Underdale

Suburb (SAL)

Greater Adelaide / West Torrens

 
 
 
 
 
 
 
Data Sources ABSValuer GeneralRental BoardACARA Newest Aug 2026 · Refreshed ABS QuickStats SAL41488 How we calculate this
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Suburb (SAL) Boundary Analysis

This analysis uses Suburbs and Localities (SAL) boundaries, which can materially differ from Statistical Areas (SA2) even when sharing the same name.

SAL boundaries are defined by Australia Post and the Australian Bureau of Statistics to represent commonly-known suburb names used in postal addresses.

Statistical Areas (SA2) are designed for census data collection and may combine multiple suburbs or use different geographic boundaries. For comprehensive analysis, consider reviewing both boundary types if available.

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Sales ActivityProperty Sales Trends in Underdale

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DemographicsPopulation Growth in Underdale

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Underdale has an estimated 3,176 residents, up from 2,429 at the 2021 Census — a change of 747 people, or 30.8%. Growth has averaged 5.3% a year over five years, faster than 95% of areas nationally. Overseas migration accounts for 89.0% of that increase. That puts 3,114 residents on each square kilometre. Population is estimated from ABS Estimated Resident Population releases and GNAF address data, re-based from the 2021 Census and updated annually.

Detail

According to investigations of ABS population estimates for the region, alongside newly confirmed address points from AreaSearch following the Census, the suburb of Underdale has a population estimated to be 3,176 in May 2026. This represents a growth of 747 individuals (30.8%) relative to the 2,429 residents counted during the 2021 Census. This population shift is calculated from the estimated resident figure of 3,176, derived by AreaSearch through analysing the ABS ERP data from June 2025 together with 34 newly validated addresses since the Census. Such a population count corresponds to a density of 3,113 persons per square kilometer, placing the suburb in the highest quarter of all Australian locations evaluated by AreaSearch.

The 30.8% expansion rate in the suburb of Underdale since the 2021 Census outpaced the state growth of 7.5% and the local SA3 region, positioning the locality as a regional leader in expansion. The population gains were heavily supported by overseas arrivals, who accounted for roughly 89.0% of the overall growth in recent times. AreaSearch utilizes ABS and Geoscience Australia projections for each individual SA2, published in 2024 using 2022 as the baseline. For any SA2 regions lacking this coverage, and for projections beyond 2032, regional age-based figures from the SA State Government released in 2023 using 2021 data are used, with modifications made by combining population growth figures from local government areas to the SA2 level. Looking at future demographic trends, the suburb of Underdale is projected to experience population expansion slightly lower than the median of Australian statistics areas, with expectations of adding 313 residents by 2041 using consolidated SA2 projections, representing an overall increase of 9.9% across the 16 years.

Frequently Asked Questions - Population

What is the latest population estimate for the suburb of Underdale?
Total population for the suburb of Underdale was estimated to be approximately 3,176 as at May 26. This is based upon an estimated resident population of 3,176 from the ABS up to June 2025.
How has the population in the suburb of Underdale changed since 2021?
The suburb of underdale has added approximately 747 people and shown a 30.75% increase from the 2,429 people recorded at the 2021 Census period.
What is the population density in the suburb of Underdale?
The population density in the suburb of Underdale is estimated at 3,113 persons per square kilometer based on the latest population estimate.
How much has the population grown over the past 10 years in the suburb of Underdale?
Over the past 10 years, the population in the suburb of Underdale has shown a compound annual growth rate of 3.0% per annum.
What are the main drivers of population growth in the suburb of Underdale?
Population growth in the suburb of Underdale is driven by: Overseas migration (89.0%), Natural increase (11.0%), Interstate migration (0.0%). The primary driver is Overseas migration, contributing 89.0% of overall population gains.

Residential SupplyHousing Development & Building Approvals in Underdale

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109 new dwellings have been approved in Underdale over the past five years, an average of 21 a year. That places the area in the 87th percentile for residential development activity nationally, about 7 approvals per 1,000 residents a year. Of the 28 dwellings approved in the latest reporting year, 54% were detached houses and the rest townhouses or apartments. Approvals are currently running at an annualised 61, running ahead of that longer-run average. Figures come from ABS building approvals aggregated to this Suburb (SAL) boundary and are updated monthly as the ABS releases them.

Detail

AreaSearch evaluation of ABS building approval statistics distributed from regional data indicates that the suburb of Underdale averages approximately 21 approved residential dwellings each year. A total of 109 homes were approved during the 5 financial years spanning FY-21 to FY-25, and an additional 56 approvals have been logged in FY-26 so far. With an average of 6.6 net new residents joining the local population annually for every dwelling completed during the 5 financial years spanning FY-21 to FY-25, local demand is outpacing incoming supply, which commonly drives prices upward and intensifies buyer competition, while new builds carry an average construction cost of $465,000, pointing to a developer focus on high-end, premium projects.

Furthermore, commercial building approvals worth $9.5 million have been registered during this financial year, pointing to steady non-residential development. Relative to Greater Adelaide, the suburb of Underdale registers marginally higher building activity, tracking 18.0% above the regional average per capita over the 5 year timeframe, which helps sustain existing home values while offering buyers options. Newly approved construction consists of 54.0% freestanding houses alongside 46.0% medium and high-density formats, with a rising volume of apartments and townhouses providing choices across price categories, spanning from larger family options to compact, lower-cost options. Recording roughly 78 residents per approved residential building, the suburb of Underdale displays demographic trends typical of a growth locality. Long-term projections indicate that the suburb of Underdale will gain 313 residents by 2041 based on the most recent quarterly estimate from AreaSearch. If current building rates persist, the upcoming housing pipeline should easily accommodate this growth, ensuring balanced conditions for purchasers and potentially enabling expansion levels above current demographic forecasts.

Frequently Asked Questions - Development

How many dwelling approvals have occurred in the suburb of Underdale recently?
Dwelling approval activity in the the suburb of Underdale area has seen 79 residential approvals over the past two financial years, based on AreaSearch's SA2 aggregation method. The suburb of Underdale's current population of 3,176 has been supported by 21 approvals on average over recent years.
How does the suburb of Underdale's development activity compare to the broader region?
The suburb of Underdale has seen 0.77 approvals per 100 people in recent years, compared to 0.74 approvals in the broader region. This means that one dwelling has been approved for every 78 people in the suburb of Underdale, compared to one for every 144 in the broader region.
Is the suburb of Underdale keeping up with housing demand?
With the population expected to increase by 313 people by 2041, around 157 new dwellings will be necessary. Recent approval levels appear more than sufficient to meet these forecasts, considering the census average of 2.0 persons per dwelling. This suggests that population growth may exceed trend projections in the coming years, supported by a robust housing supply.
What has been the trend in development approvals over the past five years in the suburb of Underdale?
Looking at development activity over the past five years, the suburb of Underdale's approval levels have been significantly above the yearly average of 21, indicating strong recent growth in development activity.
How many dwellings will be needed to accommodate future population growth in the suburb of Underdale?
The population in the suburb of Underdale is expected to grow by 313 people by 2041, necessitating approximately 157 new dwellings. This calculation is based on the current census average of 2.0 persons per dwelling in the area.
How does recent development compare to population growth in the suburb of Underdale?
Over the past five years, the population in the suburb of Underdale has grown by approximately 1,291 people, while 109 residential approvals were recorded. This equates to a ratio of 11.8 people added for each new dwelling approval. This high ratio suggests strong population growth relative to housing supply, potentially indicating unmet housing demand.
Are there opportunities for residential developers in the suburb of Underdale?
With dwelling approval activity running at an average of 21 approvals per year and a population of 3,176, the market appears to be adequately supplied relative to projected housing demand in recent years, suggesting that developers should have a longer-term approach when considering new projects. With the population expected to increase by 313 people by 2041, around 157 new dwellings will be necessary. Recent approval levels appear more than sufficient to meet these forecasts, considering the census average of 2.0 persons per dwelling. This suggests that population growth may exceed trend projections in the coming years, supported by a robust housing supply.
Approvals Pipeline Development applications near Underdale

Development applications around Underdale

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SOURCE: Planning portals and council registers, compiled by AreaSearch. Distance & bearing measured from the suburb midpoint.

Project PipelineInfrastructure & Major Projects in Underdale

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AreaSearch tracks 12 current infrastructure and development projects close to Underdale, worth an estimated $1.03 billion. 4 are already under construction. The pipeline spans sports & recreation, retail and education & training. Records are compiled from Infrastructure Australia, state agencies, council planning portals and public announcements, reviewed and updated daily, then ranked by proximity, construction stage, completion horizon and project scale.

Detail

Local infrastructure shifts, major projects, and town planning decisions are critical drivers of local performance. A single project has been identified by AreaSearch as having a likely impact on the immediate area. The main initiatives include the Henley Beach Road Visioning Project, the Harbour Town Premium Outlets Adelaide Expansion, the New Women's and Children's Hospital, and the North South Corridor, with details provided on those expected to be most relevant.

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Frequently Asked Questions - Infrastructure

What are some of the major infrastructure and planning changes likely to influence the suburb of Underdale?
Key infrastructure and planning changes likely to influence the suburb of Underdale include: Henley Beach Road Visioning Project (Planning); Harbour Town Premium Outlets Adelaide Expansion (Completed); New Women's and Children's Hospital (Construction); North South Corridor (Construction); and SA Housing Trust Maintenance Contracts Review and Service Program (Construction). These projects represent significant developments that will shape the area's future infrastructure landscape.
What types of infrastructure projects are impacting the suburb of Underdale?
Infrastructure development impacting the suburb of Underdale spans multiple sectors including Transport & Logistics, Health & Medical, and Retail, among others.
What is the scale of infrastructure investment impacting the suburb of Underdale?
Infrastructure investment analysis indicates substantial capital deployment exceeding $9.1 billion in projects that will impact the extended area.
How does the suburb of Underdale's infrastructure development compare to other areas?
Infrastructure development activity impacting the suburb of Underdale currently ranks below national averages at the 21stth percentile.
Henley Beach Road Visioning Project
Category: Precincts & Urban Renewal
Stage: Planning | Est. Comp: 0
Source / Links: Link 1   Link 2  

City of West Torrens long-term main street renewal for an approximately 3 km corridor between Airport Road and the Bakewell Underpass. The Vision and five Guiding Principles were adopted by council and completed in January 2025. Implementation is now underway in phases: Stage 1 of the Thebarton Theatre upgrade is complete, Jervois Street has been upgraded with wider footpaths, a traffic and parking study is in progress, shopfront activation works are underway, and a pop-up piazza is being investigated.The vision targets a cosmopolitan, people-friendly boulevard celebrating cultural diversity, improved public transport, green space, and pedestrian access.

Precincts & Urban Renewal

Southwark Grounds
Category: Communities, Precincts & Urban Renewal
Stage: Construction | Est. Comp: 2035
Source / Links: Link 1   Link 2  

The $1 billion Southwark Grounds precinct is transforming the 8.4-hectare former West End Brewery site into a sustainable inner-city neighborhood. The masterplan includes 1,300 homes with a 20% affordable housing mandate, a supermarket, childcare centre, and aged care facility. The project features 'Brewery Green', a major civic space connecting the heritage-listed Walkerville Brew Tower to the River Torrens. Civil works and infrastructure delivery are active throughout 2026, with the first residential stage, Founder's Row, nearing completion and West Village townhouses currently in market.

Communities, Precincts & Urban Renewal

Frank Norton Reserve Redevelopment
Category: Sports & Recreation
Stage: Construction | Est. Comp: 0
Source / Links: Link 1   Link 2  

A major redevelopment project for the Frank Norton Reserve, set to begin in late January 2025. This project focuses on enhancing community recreation facilities and public spaces.

Sports & Recreation

Thebarton Theatre Complex Redevelopment
Category: Arts & Culture
Stage: Construction | Est. Comp: 0
Source / Links: Link 1   Link 2  

An upgrade of the iconic State heritage-listed Thebarton Theatre Complex. The redevelopment aims to conserve its unique heritage values while enhancing its ongoing use as a working entertainment venue, including improved accessibility, new entry lobby, bathrooms, outdoor areas, and operational improvements. Construction is underway, with Stage 1 expected to complete by mid-late 2025, and the theatre set to reopen in October 2025.

Arts & Culture

Adelaide Crows Thebarton Oval Facility
Category: Sports & Recreation
Stage: Construction | Est. Comp: 0
Source / Links: Link 1   Link 2  

Development of a new state-of-the-art training, administration, and community headquarters for the Adelaide Football Club at Thebarton Oval. The $100 million project includes a two-storey building with a caf', members lounge, function centre, and interactive museum, serving as a permanent match-day home for the AFLW team.

Sports & Recreation

Thebarton Technology Hub
Category: Science & Research
Stage: Planning | Est. Comp: 0
Source / Links: Link 1   

A master plan to develop and promote a bioscience and technology precinct within Thebarton. The initiative aims to attract new early-stage companies, improve the precinct's environment for existing employees, and enhance amenity and visual credibility.

Science & Research

Construction of Shared Path, Thebarton
Category: Sports & Recreation
Stage: Completed | Est. Comp: 0
Source / Links: Link 1   

Construction of a shared path in Thebarton, funded by a grant of $150,000.

Sports & Recreation

Land Purchase for Shared Path, City of West Torrens
Category: Sports & Recreation
Stage: Completed | Est. Comp: 0
Source / Links: Link 1   

Land purchase to enable future shared path development within the City of West Torrens, supported by a grant of $290,000.

Sports & Recreation

Jobs & IndustryEmployment Trends in Underdale

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1,953 residents of Underdale are employed, from a labour force of 2,006. Unemployment sits at 2.6%, with participation at 74.1%. Weighted for its industry mix, the area's sectors are forecast to grow about 6.7% nationally over five years. That reflects industry composition only and makes no allowance for local population growth, so in an area growing as fast as this one it understates the likely rise in local jobs. Unemployment and labour force come from ABS Small Area Labour Markets, updated quarterly; the industry and occupation profile is from the 2021 Census.

Detail

The suburb of Underdale is characterized by an educated labor force, a strong showing in basic services, an unemployment rate of only 2.6%, and estimated job numbers increasing by 12.0% over the past year, according to AreaSearch regional data. In March 2026, there were 1,953 employed locals, the unemployment level sat 1.2% lower than the 3.8% recorded in Greater Adelaide, and the labor force participation rate reached an elevated 74.1% compared to 66.6% across Greater Adelaide. According to Census replies, a small share of 11.3% of workers operated from home, though this may have been influenced by pandemic-related movement restrictions.

The primary employment fields for working locals are health care & social assistance, education & training, and retail trade. The local workforce has a notable concentration in finance & insurance, representing 1.4 times the regional proportion. Conversely, industrial manufacturing is less common, making up 5.6% of the workforce in the suburb of Underdale relative to 7.0% across Greater Adelaide. The presence of 0.7 workers for every local inhabitant at the Census demonstrates a higher availability of local jobs than is typical. Based on AreaSearch aggregation of SALM and ABS statistics for the broader district, during the twelve months leading to March 2026, local employment numbers expanded by 12.0% and the overall labor pool grew by 10.6%, resulting in a 1.2 percentage point drop in unemployment. In comparison, Greater Adelaide experienced a 4.2% rise in employment, a 4.0% increase in the labor force, and a 0.2 percentage point reduction in unemployment. National employment projections from Jobs and Skills Australia dated May-25 offer additional context on future labor needs in the suburb of Underdale. These models, spanning five and ten years, are mapped against local jobs data to project expansion. While nationwide employment is projected to grow by 6.6% over five years and 13.7% over ten years, the rates of change vary by industry. Combining these industry trends with the local employment profile suggests employment in the suburb of Underdale should grow by 6.7% over five years and 14.0% over ten years, noting this is a simple weighted calculation for demonstration that excludes local population projection models.

Frequently Asked Questions - Employment

What is the employment situation in the suburb of Underdale?
As of March 2026, the suburb of Underdale has approximately 1,953 employed residents with an unemployment rate of 2.6%. This very low unemployment rate indicates a tight labour market with strong demand for workers. The area ranks in the top 25% nationally for employment performance, indicating a robust job market.
How does the suburb of Underdale's unemployment rate compare to the broader region?
As of March 2026, the unemployment rate in the suburb of Underdale stands at 2.6%, which is 1.2 percentage points below Greater Adelaide's rate of 3.8%. This lower unemployment rate suggests stronger local employment conditions. For comparison, the national unemployment rate is 4.2%.
What are the major employment sectors in the suburb of Underdale?
The employment landscape in the suburb of Underdale is dominated by several key sectors. The largest employers are health care & social assistance (17.9% of employment), education & training (9.8%), and retail trade (9.5%). Other significant employers include public administration & safety and construction.
How has employment changed recently in the suburb of Underdale?
Over the past year to March 2026, the suburb of Underdale has experienced employment growth, with total employment increasing while the labour force increased. As a result, the unemployment rate has fall. By comparison, Greater Adelaide saw employment increased and its unemployment rate dropped.
What is the workforce participation rate in the suburb of Underdale?
The workforce participation rate in the suburb of Underdale is 74.1%, which represents the proportion of working-age residents who are either employed or actively seeking work. This high participation rate indicates strong workforce engagement and economic vitality. The local rate leading the Greater Adelaide average of 66.6%, indicating stronger workforce attachment in the local area.
Which industries are over-represented in the suburb of Underdale's employment market?
The suburb of underdale shows notable specialization in finance & insurance, which employs 4.5% of the local workforce compared to 3.3% regionally. This moderate specialization indicates some local strength in the sector.
What are the employment growth prospects for the suburb of Underdale?
Based on Jobs and Skills Australia projections applied to the suburb of Underdale's industry mix, employment is expected to grow by 6.7% over the next five years and 14.0% over ten years. This exceeds the national forecast of 6.6% over five years, suggesting the area's industry composition is well-positioned for future growth. Steady growth is anticipated across multiple sectors, providing diverse employment opportunities.
How does the job market in the suburb of Underdale compare nationally?
The suburb of underdale's employment market shows strong performance nationally, ranking in the top 25% of areas assessed by AreaSearch. This indicates robust employment conditions and economic vitality compared to other regions. Recent job advertisement trends show the broader employment region experienced 0.7% growth, ranking 11.0th out of 37 regions nationally.
What employment opportunities exist for skilled workers in the suburb of Underdale?
Skilled workers will find excellent opportunities in the suburb of Underdale, with knowledge-intensive sectors comprising 40.8% of local employment. Key sectors for skilled workers include health care & social assistance (17.9%), education & training (9.8%), and professional & technical (7.1%). With projected employment growth of 6.7% over five years, demand for skilled workers is expected to remain strong.

EarningsHousehold Income in Underdale

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Median household income in Underdale is $1,578 a week (about $82,000 a year), with median personal income at $830 a week. ATO records put median taxable income at $53,661 a year against an average of $67,028. Household income is from the 2021 Census; taxable income is from ATO Taxation Statistics for the latest financial year available, indexed forward using the ABS Wage Price Index.

Detail

The suburb of Underdale has an income level that aligns closely with the national average, according to ATO figures compiled by AreaSearch for financial year 2023. The median tax returns in the suburb of Underdale were $53,661 and average earnings were $67,028, compared to regional medians of $54,808 and averages of $66,852 in Greater Adelaide. Accounting for a 10.17% rise in the Wage Price Index since financial year 2023, local values are estimated at approximately $59,118 for the median and $73,845 for the average as of March 2026. According to the Census, household, family, and individual incomes are moderate in the suburb of Underdale, placing between the 40th and 55th percentiles.

Distribution statistics show the dominant income band is the $1,500 - 2,999 category, containing 30.3% of locals (962 people), matching the regional rate of 31.8%. Affordability pressures are high, with residents retaining just 84.4% of their income, which sits in the 41st percentile, while the SEIFA index ranks the area in the 5th decile for income.

Frequently Asked Questions - Income

What is the median taxable income in the suburb of Underdale?
Based on Wage Price Index adjustments to March 2026, the estimated median taxable income in the suburb of Underdale is approximately $59,118. The official ATO data from FY-23 recorded a median of $53,661.
What is the average taxable income in the suburb of Underdale?
Based on Wage Price Index adjustments to March 2026, the estimated average taxable income in the suburb of Underdale is approximately $73,845. The official ATO data from FY-23 recorded an average of $67,028.
How does the median taxable income in the suburb of Underdale compare to the region?
Based on Wage Price Index adjustments to March 2026, the estimated median taxable income in the suburb of Underdale is approximately $59,118 compared to $60,382 in Greater Adelaide. The official ATO data from FY-23 shows $53,661 and $54,808 respectively.
How does the average taxable income in the suburb of Underdale compare to the region?
Based on Wage Price Index adjustments to March 2026, the estimated average taxable income in the suburb of Underdale is approximately $73,845 compared to $73,651 in Greater Adelaide. The official ATO data from FY-23 shows $67,028 and $66,852 respectively.
What are the main income cohorts in the suburb of Underdale according to the 2021 Census?
As per the 2021 Census, the income bracket containing the largest proportion (~30.3% / 962 persons) of the suburb of Underdale's population is the $1,500 - 2,999 cohort.
How do the main income cohorts in the suburb of Underdale compare to the region?
The largest income cohort in the suburb of Underdale is the $1,500 - 2,999 group, representing about 30.3% of the population. In comparison, Greater Adelaide's largest income cohort is the $1,500 - 2,999 group, representing 31.8% of its population, according to the 2021 Census.
What is the median household income in the suburb of Underdale according to the 2021 Census?
The 2021 Census data indicates that the median household income in the suburb of Underdale is $1,578/wk.
What is the median family income in the suburb of Underdale according to the 2021 Census?
According to the 2021 Census, the median family income in the suburb of Underdale is $2,133/wk.
What is the median personal income in the suburb of Underdale according to the 2021 Census?
The 2021 Census shows that the median personal income in the suburb of Underdale is $830/wk.
How does the suburb of Underdale's income rank nationally?
The suburb of Underdale shows a median taxpayer income of $53,661 and an average of $67,028 according to the latest postcode level ATO data aggregated by AreaSearch for FY-23. This is in line with the national averages, contrasting with Greater Adelaide's median income of $54,808 and average income of $66,852. Based on Wage Price Index growth of 10.17% since FY-23, current estimates would be approximately $59,118 (median) and $73,845 (average) as of March 2026.
What is the disposable income in the suburb of Underdale?
The estimated disposable income in the suburb of Underdale is $5,773 per year according to AreaSearch analysis.
How does the suburb of Underdale's disposable income compare to the region?
The suburb of underdale's disposable income is $5,773 compared to $5,698 for Greater Adelaide, based on AreaSearch analysis.

Housing StockHousing & Dwellings in Underdale

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Underdale had 1,016 occupied dwellings at the 2021 Census, 64% detached houses and 19% apartments. 31% are owned with a mortgage, 38% rented and 31% owned outright. At that Census the median rent was $310 a week and the median mortgage repayment $1,786 a month. Rent absorbs 19.6% of household income here and mortgage repayments 26.1%. Dwelling stock, tenure and housing costs are 2021 Census measures — the only source that counts dwellings at this boundary size.

Detail

Housing types in the suburb of Underdale at the recent Census consisted of 63.6% detached houses and 36.5% alternative dwellings including apartments, semi-detached, and other types, compared to 75.2% detached houses and 24.9% alternative dwellings in Greater Adelaide. Home ownership rates in the suburb of Underdale matched the Adelaide metro benchmark of 31.1%, with remaining properties held under a mortgage (31.1%) or occupied by renters (37.9%). The median monthly home loan payment was $1,786, which is higher than the Adelaide metro average of $1,562, while the weekly rent median was $310 compared to the Adelaide metro average of $320.

Nationally, mortgage costs in the suburb of Underdale are below the Australian average of $1,863, and typical rent costs are much lower than the national median of $375.

Frequently Asked Questions - Housing

What percentage of homes are owned vs rented in the suburb of Underdale?
In the suburb of Underdale, 31.1% of homes are owned outright, 31.1% are owned with a mortgage, and 37.9% are rented.
What percentage of dwellings in the suburb of Underdale are houses?
According to the latest data, 63.6% of dwellings in the suburb of Underdale are houses.
What percentage of dwellings in the suburb of Underdale are apartments or units?
In the suburb of Underdale, 18.7% of dwellings are apartments or units, with an additional 17.8% being semi-detached dwellings.
What is the level of outright home ownership in the suburb of Underdale?
Outright home ownership in the suburb of Underdale stands at 31.1%, compared to 32.1% in Greater Adelaide.
What is the median monthly mortgage repayment in the suburb of Underdale?
The median monthly mortgage repayment in the suburb of Underdale is $1,786, compared to $1,562 in Greater Adelaide.
What is the median weekly rent in the suburb of Underdale?
The median weekly rent in the suburb of Underdale is $310, compared to $320 in Greater Adelaide.
What is the distribution of rental prices in the suburb of Underdale?
In the suburb of Underdale, 7.7% of rentals are $0-149/week, 56.3% are $150-349/week, 36.0% are $350-649/week, 0.0% are $650-949/week, and 0.0% are $950+/week.
What is the average monthly housing cost in the suburb of Underdale?
The aggregate monthly housing cost in the suburb of Underdale is $1,064, which represents the average monthly cost across all housing types.
What percentage of income do residents spend on housing in the suburb of Underdale?
In the suburb of Underdale, households with mortgages typically spend 26.1% of their income on mortgage repayments, while renters spend 19.6% of their income on rent.
How crowded are homes in the suburb of Underdale?
The average persons per bedroom ratio in the suburb of Underdale is 0.8, indicating the level of household density.
How does housing affordability in the suburb of Underdale compare to the region?
Housing affordability in the suburb of Underdale shows mortgage holders spending 26.1% of income on repayments (vs 23.3% regionally), while renters spend 19.6% of income on rent (vs 20.7% regionally).
What types of dwellings are most common in the suburb of Underdale?
The dwelling mix in the suburb of Underdale consists of 63.6% detached houses, 17.8% semi-detached dwellings, 18.7% apartments, and 0.0% other dwelling types.
What is the weighted average housing cost based on tenure mix in the suburb of Underdale?
Based on the area's tenure composition, the weighted average monthly housing cost is approximately $1,064. This accounts for outright owners paying no housing costs, mortgage holders paying $1,786/month, and renters paying $1,342/month.
How affordable is housing in the suburb of Underdale relative to local incomes?
Housing in Underdale consumes approximately 15.6% of median household income ($6,833 monthly), indicating costs are highly affordable. The generally accepted benchmark is that housing should not exceed 30% of household income.
How do proposed developments compare to existing housing types in the suburb of Underdale?
Recent development applications in Underdale show attached dwellings contributing 57% of approvals compared to 36% of existing stock, while detached houses represent 42% of applications versus 64% of current dwellings. This suggests increasing densification. Housing density growth is around the national average.

HouseholdsHousehold Composition in Underdale

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Underdale counted 1,016 households at the 2021 Census, an estimated 1,328 today, averaging 2.3 people each. 28% are couples with children, against 24% couples without children. 32% of households are people living alone, and families average 1.3 children. Household and family composition is measured only by the Census, so these are 2021 figures.

Detail

Families represent the primary household type at 62.4%, consisting of couples raising children at 28.2%, couples without children at 24.2%, and single parents with children at 8.7%. Non-family households comprise the remaining 37.6% of homes, consisting of single-person households at 31.9% and shared group households at 5.4%. The median household size of 2.3 people is smaller than the Greater Adelaide average of 2.5.

Frequently Asked Questions - Households

How many households are in the suburb of Underdale?
As of the 2021 Census, the suburb of Underdale had 1,016 households. Based on population growth patterns, this has grown by approximately 30.7% to an estimated 1,328 households today.
What is the typical household size?
The median household size in the suburb of Underdale is 2.3 people. This compares to 2.5 in Greater Adelaide and reflects the area's household composition mix.
What types of households are most common?
Family households dominate at 62.4% of all households. The remaining households consist of lone person households (31.9%), group households (5.4%), and other household types (0.0%).
How are families structured in the area?
Among the 633 family households, 28.2% are couples with children, 24.2% are couples without children at home, and 8.7% are single parent families. This mix shapes local demand for schools, family services, and housing types.
How does the suburb of Underdale compare to regional household patterns?
Compared to Greater Adelaide, the suburb of Underdale shows distinct household patterns. Conversely, family households are under-represented at 62.4% compared to the regional 68.6%. This higher proportion of single-person households drives demand for smaller dwellings and different community services.
What is the average family size?
Families in the suburb of Underdale have an average of 1.3 children, slightly below the Greater Adelaide average of 1.5. This influences local demand for child-related services and larger family homes.
What are the marriage patterns in the suburb of Underdale?
Marriage patterns reveal 45.9% of the adult population are currently married, while 37.8% have never married. This compares to 45.7% married and 36.4% never married across Greater Adelaide.
How significant are single-person households?
Single-person households represent 31.9% of all households in the suburb of Underdale, similar to the regional average of 27.7%. This affects demand for smaller dwellings and single-person accommodation.
Are shared living arrangements common?
Group households (unrelated people sharing) account for 5.4% of households, well below the Greater Adelaide average of 3.7%. This low rate suggests limited student or young professional shared accommodation.
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EducationSchools & Education in Underdale

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35.6% of adults in Underdale hold a university qualification, including 23.9% with a bachelor degree and 9.2% with postgraduate qualifications. A further 18.2% hold a vocational qualification. 2 schools serve the area, with 628 enrolment places and an average ICSEA of 998 against a national benchmark of 1,000. Qualifications come from the 2021 Census; school enrolments, ICSEA and results come from ACARA's current release.

Detail

The educational makeup of the area is distinct in the region, with higher education qualification rates showing 35.6% of residents aged 15+ holding a degree, compared to the SA average of 25.7% and the Greater Adelaide average of 28.9%. Bachelor programs represent the most common degree at 23.9%, followed by postgraduate study at 9.2% and graduate diplomas at 2.5%. Practical and vocational qualifications are also common, with 28.9% of residents aged 15+ holding trade credentials, consisting of advanced diplomas at 10.7% and certificates at 18.2%. Engagement in learning is high, with 26.6% of the population enrolled in an educational program.

This contains 8.1% of residents in primary schooling, 6.5% attending tertiary institutions, and 5.6% in secondary schools.

Frequently Asked Questions - Education

What percentage of people in the suburb of Underdale have university qualifications?
35.6% of people aged 15 and over in the suburb of Underdale have university qualifications, compared to 28.9% in the broader region.
What percentage of people in the suburb of Underdale have no formal qualifications?
35.5% of people aged 15 and over in the suburb of Underdale have no formal qualifications, compared to 39.0% regionally.
How does the suburb of Underdale's education level compare to national averages?
The suburb of underdale ranks in the 47th percentile nationally for education based on AreaSearch's analysis of qualification and performance metrics.
What types of qualifications are most common in the suburb of Underdale?
The most common qualifications in the suburb of Underdale are: Bachelor Degree (23.9%), Certificate (18.2%), Advanced Diploma (10.7%).
What proportion of the suburb of Underdale's population is currently attending educational institutions?
26.6% of the population in the suburb of Underdale is currently engaged in formal education, with 8.1% in primary school, 5.6% in secondary school, 6.5% at university.
What is the ICSEA score for schools in the suburb of Underdale?
The average ICSEA (Index of Community Socio-Educational Advantage) score for schools in the suburb of Underdale is 998, indicating below-average socio-educational advantage compared to the national average of 1000.
How many schools are located within the suburb of Underdale?
There are 2 schools within the suburb of Underdale, with a combined enrollment of approximately 628 students.
What types of schools are available in the suburb of Underdale?
The suburb of underdale includes 2 secondary schools.

Schools Detail

AmenitiesServices & Amenities in Underdale

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Getting AroundTransport & Commuting in Underdale

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Public transport in Underdale reaches 14 stops on 24 routes, timetabled for about 1,700 services a week. The typical home sits about 150 m from its nearest stop. Buses carry the largest share of public transport commuters. Households keep an average of 1.3 vehicles. Stop and service counts are built from operators' published GTFS timetables and refresh with each timetable release; vehicle ownership is from the 2021 Census.

Detail

Public transit statistics show 14 active stops operating in the suburb of Underdale, consisting of bus services. These stops are served by 24 unique routes, which provide a total of 1,682 passenger trips each week. Access to transit is rated as excellent, with locals living an average of 153 meters from their closest stop. Being a mostly residential suburb, the majority of working residents travel outside the area, with private cars remaining the primary travel mode at 81%, and buses used by 9%. Households own an average of 1.3 cars.

A small proportion of 11.3% of workers worked from home, based on the 2021 Census, which may have been impacted by pandemic restrictions. Transit service frequency averages 240 trips daily across all local routes, which translates to about 120 weekly journeys for each individual stop.

Frequently Asked Questions - Transport

How many public transport stops are in Underdale?
There are 14 public transport stops within the suburb of Underdale.
How frequent are the transport services in Underdale?
the suburb of Underdale has 1,682 weekly trips across 24 routes, averaging 240 trips per day.
How far are residents from public transport in Underdale?
On average, residential properties are 153 meters from the nearest transport stop.

Transport Stops Detail

HealthcareHealth Services in Underdale

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74.1% of residents in Underdale report no long-term health condition. 3.9% need daily assistance with core activities, and 53.5% hold private health cover. The standardised death rate runs at 5.3 per 1,000 residents. Health conditions, assistance needs and insurance are 2021 Census measures; the death rate comes from current ABS releases.

Detail

Assessments of local health statistics point to strong well-being outcomes throughout the suburb of Underdale, with AreaSearch analysis of mortality rates and chronic health conditions showing low rates of common illnesses across younger and older demographics, while the share of residents with private health insurance is just ahead of the typical SA2 area at approximately 53% of the population, representing about 1,698 individuals. The primary medical diagnoses among locals were mental health conditions and asthma, affecting 6.6 and 6.4% of residents, respectively, while 74.1% of the population reported no long-term illnesses, compared to 67.9% across Greater Adelaide.

The working-age population exhibits strong health with low rates of chronic diseases. Those aged 65 and over make up 18.5% of the community, representing 587 individuals. Seniors in this area experience particularly positive health outcomes, with national rankings exceeding those of the general local population.

Frequently Asked Questions - Health

How many people in the suburb of Underdale have private health insurance?
Around 53.5% of people in the suburb of Underdale are covered by private health insurance, which compares to 52.7% in the broader region of Greater Adelaide.
What percentage of the population requires ongoing medical assistance in the suburb of Underdale?
In the suburb of Underdale, 3.9% of the population is identified as requiring ongoing medical assistance. This figure is slightly different from the regional average, where 6.6% of people in Greater Adelaide require similar assistance.
How prevalent is asthma in the suburb of Underdale?
6.4% of people in the suburb of Underdale are diagnosed with asthma. In comparison, 7.7% of the population across Greater Adelaide is affected by asthma.
What percentage of people have diabetes in the suburb of Underdale?
Diabetes affects 4.5% of the the suburb of Underdale population, while in the surrounding region, 4.8% of people are diagnosed with diabetes.
What is the percentage of people with heart disease in the suburb of Underdale?
3.0% of people in the suburb of Underdale have heart disease. Across the region of Greater Adelaide, 3.8% of the population is affected by heart disease.
How does the suburb of Underdale compare to the region in terms of overall private health coverage?
In the suburb of Underdale, 53.5% of the population are estimated to have private health insurance. Comparatively, Greater Adelaide sees an estimated private health coverage rate of 52.7%.

Ancestry & LanguageCultural Diversity in Underdale

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33.6% of Underdale residents were born overseas and 35.5% speak a language other than English at home, more culturally diverse than 78% of areas nationally. The largest reported ancestries are English (19.1%) and Australian (18.2%). Ancestry, language and country of birth are counted only by the Census, so these are 2021 figures.

Detail

The suburb of Underdale registers high cultural diversity, with 33.6% of the local population born overseas and 35.5% using a non-English language at home. Christianity is the primary religion, followed by 49.6% of residents in the suburb of Underdale. The most pronounced difference is in the Other religious category, which represents 3.9% of the local population compared to 1.8% across Greater Adelaide. Based on parental birthplaces, the largest ancestry groups in the suburb of Underdale are English at 19.1%, which is lower than the Greater Adelaide average of 27.8%, Australian at 18.2%, and Other at 12.3%.

Significant differences are present in other backgrounds, with Greek ancestry represented at 6.6% in the suburb of Underdale compared to 2.0% in Greater Adelaide, Italian ancestry at 10.9% compared to 5.2% regionally, and Indian ancestry at 4.9% compared to 2.3% regionally.

Frequently Asked Questions - Diversity

What is the level of cultural diversity in the suburb of Underdale?
Underdale scores quite highly on cultural diversity, with 33.6% of its population born overseas and 35.5% speaking a language other than English at home.
What is the most common religion in the suburb of Underdale?
The main religion in Underdale was found to be Christianity, which makes up 49.6% of people in Underdale. However, the most apparent overrepresentation was in Other, which comprises 3.9% of the population, compared to 1.8% across Greater Adelaide.
What are the top countries of origin in the suburb of Underdale?
In terms of ancestry (country of birth of parents), the top three represented groups in Underdale are English, comprising 19.1% of the population, which is notably lower than the regional average of 27.8%, Australian, comprising 18.2% of the population, and Other, comprising 12.3% of the population. Additionally, there are notable divergences in the representation of certain other ethnic groups: Greek is notably overrepresented at 6.6% of Underdale (vs 2.0% regionally), Italian at 10.9% (vs 5.2%) and Indian at 4.9% (vs 2.3%).
How does the percentage of people born overseas compare to the regional average?
33.6% of the the suburb of Underdale population was born overseas, compared to 28.7% regionally.
What percentage of the the suburb of Underdale population speaks a language other than English at home?
35.5% of the population in the suburb of Underdale speaks a language other than English at home, compared to 22.2% in the wider region.
How many people in the suburb of Underdale identify as Australian Aboriginal?
1.2% of the the suburb of Underdale population identifies as Australian Aboriginal, compared to 1.2% in the region.
What is the citizenship status of the population in the suburb of Underdale?
83.8% of the the suburb of Underdale population holds citizenship, compared to 86.3% in the wider region.

Age StructureAge Profile of Underdale

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The median resident of Underdale is 38. 28.4% of residents are aged 15 to 34. Age cohorts are not raw Census counts: the Census split is re-based to the latest ABS population estimates and state projections.

Detail

With a median age of 38, the suburb of Underdale is close to the Greater Adelaide figure of 39 and identical to the national average of 38 years. Relative to Greater Adelaide, the 25 - 34 cohort is highly represented at 16.9% locally, while children aged 5 - 14 are less common at 9.9%. Since 2021, the 65 to 74 age group rose from 8.9% to 9.9% of the population, while the 55 to 64 group decreased from 13.3% to 11.6%. Modeling suggests that by 2041, the local age structure will change, with the 45 to 54 cohort projected to increase by 80 people (21%) from 374 to 455, while the 0 to 4 group is projected to decrease by 5 residents.

Frequently Asked Questions - Age

What is the median age in the suburb of Underdale?
According to the latest data, the median age in the suburb of Underdale is 38 years.
How does the suburb of Underdale's median age compare to broader areas?
At 38 years, Underdale is comparable to the Greater Adelaide average (39 years) and similarly aligned with equal to the national average.
What age groups are over-represented in the suburb of Underdale?
The most over-represented age group in the suburb of Underdale compared to the Greater Adelaide region is the 25 - 34 group, making up 16.9% of the population.
What age groups are under-represented in the suburb of Underdale?
The most under-represented age group in the suburb of Underdale compared to the Greater Adelaide region is the 5 - 14 group, making up 9.9% of the population.
Are there age groups with notable population variances?
No, the age distribution in the suburb of Underdale is broadly in line with the Greater Adelaide region.
What is the percentage of children (0-14 years) in the suburb of Underdale?
The percentage of children aged 0-14 years in the suburb of Underdale is 15.7%.
What is the percentage of older people (65+ years) in the suburb of Underdale?
The percentage of people aged 65 and over in the suburb of Underdale is 18.5%.

Data & MethodBoundaries, Sources & Method for Underdale

Data currency Refreshed

9 of 14 data sections on this page were updated within the last 12 months — the newest current to Aug 2026.

Everything is aggregated to the Suburb (SAL) boundary shown above, on a 2021 Census baseline. Only 3 sections — housing, households and cultural diversity — still wait on the 2026 Census.

The ledger — source, cycle and currency by section

Section Source & update cycle Currency
Updated within the last 12 months 9 sections
Population ABS, GNAF, Geoscience Australia Annual (ABS ERP) May 2026 3 months ago headline measures · 2021 Census baseline
Re-based to the ABS Estimated Resident Population (June 2025 release) and updated with new dwellings from GNAF address data. Current to May 2026, with the 2021 Census supplying the small-area baseline.
Age profile ABS, Geoscience Australia, State governments Annual May 2026 3 months ago headline measures · 2021 Census baseline
Age cohorts are re-based to the latest ABS population estimates and state projections, current to May 2026. Each cohort is held as a Census baseline and a current estimate.
Development & approvals ABS, GNAF Monthly (ABS approvals) Jun 2026 2 months ago headline measures · May 2026 baseline
Property sales & rents Valuer General, Rental Board, ABS Weekly sales, quarterly rents Aug 2026 this month all 21 measures
Sales from the state Valuer General register, refreshed weekly, and rents from quarterly rental bond lodgements. Both are read live each time this page loads, current to Aug 2026.
Infrastructure projects Infrastructure Australia, Local governments Daily May 2026 3 months ago all 2 projects tracked here
Project pipeline maintained continuously from Infrastructure Australia, state agencies, local government and public announcements. Records are added and revised daily; this area was last updated May 2026.
Employment ABS, DEWR, JSA Quarterly (ABS SALM) Mar 2026 5 months ago headline measures · 2021 Census baseline
Unemployment and labour force from ABS Small Area Labour Markets, current to Mar 2026. The growth outlook applies Department of Employment (now Jobs and Skills Australia) forecasts for all 19 industry divisions to the local industry mix, so it measures sector composition rather than local expansion and makes no allowance for population growth. Job demand comes from the same agency via its Internet Vacancy Index; industry and occupation structure from the 2021 Census.
Education ABS, ACARA Annual (ACARA) Aug 2026 this month headline measures · 2021 Census baseline
Transport ABS, State Transport Departments Each timetable release Jul 2026 last month headline measures · 2021 Census baseline
Services & amenities Provider directories, ACECQA Continuous Jul 2026 last month all 14 measures
Annual and financial-year sources 2 sections
Income ABS, ATO Annual (ATO) FY 2023 3 years ago headline measures · 2021 Census baseline
ATO taxable income statistics for FY 2023, indexed forward using the Wage Price Index. Census household income provides the distribution detail.
Health ABS, ATO Annual 2024 2 years ago headline measures · 2021 Census baseline
Census-measured — next update: 2026 Census 3 sections No more current small-area source exists for these, so they are labelled as Census-measured rather than implied to be current.
Housing ABS 5-yearly (Census) 2021 Census next update 2026 all 30 measures
Households ABS 5-yearly (Census) 2021 Census next update 2026 all 18 measures
Cultural diversity ABS, Geoscience Australia 5-yearly (Census) 2021 Census next update 2026 all 44 measures

"Currency" is the most recent release feeding that section. Where the Census supplies the structural baseline underneath a current headline figure, the row says so.

How the numbers are built

Population

The Census provides the small-area baseline, aggregated from mesh blocks to this boundary. It is then re-based to the ABS Estimated Resident Population (June 2025 release), and new dwellings built since Census night are counted from address data — 34 validated new addresses here. The headline figure is therefore a current estimate for May 2026, not a 2021 count (2,429 at the 2021 Census → 3,176 now). Annual growth rates are compound (CAGR), not simple averages.

Age profile

Cohort shares are not raw Census counts. Every cohort is held as a pair — the Census baseline and a current estimate — and the split is re-based using ERP and state population projections, current to May 2026. Median age is the Census median plus modelled change since. Charts that show both are labelled "2021 Census vs Current Estimate".

Property sales

Sourced from the state valuation authority's sales register — current, not Census, and refreshed weekly. Medians are calculated from settled transactions in the period shown; periods with very low transaction counts are flagged or suppressed, because a handful of sales can move a median substantially.

Rents

Derived from state rental bond lodgement data, by dwelling type and bedroom count. Bonds are lodged at the start of a new tenancy, so this reflects new lettings, not the whole rented stock.

Development & infrastructure

Building approvals come from current ABS releases; development applications are collected from council and state planning portals; the infrastructure pipeline is compiled from Infrastructure Australia and local government sources. Applications are matched to this boundary by address or coordinates, so very recent lodgements may not yet appear.

Employment & income

Industry and occupation structure comes from the Census, but the headline labour-market indicators do not. Unemployment and labour force are derived from ABS Small Area Labour Markets (quarterly). The employment outlook applies Department of Employment forecasts for all 19 industry divisions to this area's own industry mix (the agency is now Jobs and Skills Australia), as does the Internet Vacancy Index used for job demand. Because it is weighted on industry composition alone, that outlook carries no allowance for local population growth — in fast-growing areas the real rise in local jobs will typically be higher. Income combines Census household income with ATO taxable-income statistics for FY 2023, indexed forward using the Wage Price Index.

Education, transport & amenities

School enrolments, ICSEA and performance come from ACARA's current release, not the Census. Public transport stops and service frequency are derived from GTFS timetable feeds published by state transport departments. Services and amenities are proximity and count scores built from provider directories, refreshed on their own cycle. The Census contributes only the travel-to-work and qualification measures.

Rankings and benchmarks. Where we rank this area, the comparison set is every area of the same boundary type — suburbs against suburbs, SA2s against SA2s. Benchmarks compare this area against its greater capital city region and the national figure for the same measure and period.

Limits worth knowing. Small areas carry larger error margins, and the ABS introduces small random adjustments to Census counts to protect confidentiality — so totals may not sum exactly. Estimates re-based from regional data describe the area's expected trajectory, not a direct count of it. Figures are indicative for research and are not financial, planning or valuation advice.

Cross-check us. The Census baseline for this boundary is at ABS 2021 Census QuickStats (SAL41488). QuickStats reports 2021 only — the figures on this page are more current wherever the ledger shows a later date.

Common questions about this page

How do Underdale suburb boundaries differ from Statistical Areas?
This page uses Suburbs and Localities (SAL) boundaries (suburb-style geography). SAL represents commonly-known suburb names used in addresses, while Statistical Areas (SA2) are designed for census/statistical reporting. Even when sharing the same name, SAL and SA2 boundaries often cover different geographic areas with different populations.
Where does the data on this Underdale page come from?
AreaSearch compiles this page from official and industry sources — including ABS, Geoscience Australia, Valuer General, Provider directories, DEWR, JSA, State Transport Departments and ACARA — then aggregates them to the boundary shown and calculates the rankings, growth rates and benchmarks itself. Property sales come from the state valuation authority, rents from state rental bond lodgements, development applications from council and state planning portals, school data from ACARA, and public transport from state transport departments.
Is the Underdale data on this page just from the 2021 Census?
No. Most of this page is maintained well beyond the Census. Sourced entirely from current releases: development & approvals (Jun 2026), property sales & rents (Aug 2026), infrastructure projects (May 2026) and services & amenities (Jul 2026). Built on a Census baseline but carrying newer measures on top: population (to May 2026), age profile (to May 2026), employment (to Mar 2026), income (to FY 2023), education (to Aug 2026), transport (to Jul 2026) and health (to 2024). Population and age cohorts in particular are re-based to the latest ABS Estimated Resident Population rather than left at 2021 counts. Only housing, households and cultural diversity remain wholly Census-based, because no more current small-area dataset exists for those measures.

Nearby Areas