Building approvals, live development applications and major projects across the St Marys statistical area — covering Penrith and Blacktown.
These four figures are deliberately not added together. An application, an approval and a project under construction are often the same building at three points in its life, measured by three different bodies with three different lags. Read them as a sequence, not a total.
What councils and certifiers have formally permitted — the ABS series, published about four months in arrears.
Dwelling approvals a year per 100 existing homes, with New South Wales and Australia for comparison. This is the same activity as the totals view, divided by the size of the area — which is the only fair way to compare a large SA3 with a small one.
Dwelling approvals a year per 1,000 residents, each year divided by that year’s estimated resident population (ABS ERP at 30 June), not by today’s — which matters most in fast-growing areas, where a fixed denominator can understate the early years by half. The most recent periods use the latest published ERP, as the population series runs a year behind approvals. Read it alongside the per-100-homes view: the two differ wherever household size does.
Dwelling units approved each financial year. The dashed line is the five-year average of 272.
Dwelling approvals a year per 100 existing dwellings.
Detached houses as a share of existing homes, against the share of recent approvals.
Share of each year’s approvals.
The same approvals, measured against the population they have to house.
People added for every new address verified, against the size of an average local household.
A bar longer than the household average means the area gained more residents than its new housing could hold, and the extra had to be absorbed by existing homes.
Dwellings a year: what is currently being approved, against what the 2041 population projection implies.
Implied need assumes the average household stays at today’s 3.0 people. Approvals are not completions, and not every approval is built.
What is being asked for right now — applications collected from council planning portals, before any of it reaches the ABS series above. AreaSearch tracks applications of material scale; routine minor works such as signage and fencing changes are not carried, so these are not counts of every application lodged. 25 of them carry an AreaSearch analyst assessment — look for the Analysed marker in the search below.
Estimated value of applications by development type. This is the clearest single picture of what kind of place St Marys is being asked to become. A further 6 applications sit across 1 smaller category, too few to plot.
As reported by the council. Highlighted rows are applications still in assessment.
32 applications are still marked under assessment but were lodged more than 18 months ago. Councils often leave determined or abandoned applications open in their feeds, so they are counted here but excluded from the live queue above.
Applications on record within each council area that overlaps St Marys. This counts applications inside this statistical area only — it is not a total for the council.
By estimated cost of works, as lodged. Estimates are the applicant’s own figures and are not verified by AreaSearch.
What is funded and moving — the projects large enough to change how St Marys works, ranked by committed value and how close they are to delivery.
A major transport interchange project integrating the existing T1 Western Line with the new Sydney Metro Western Sydney Airport line. Key features include a new underground metro station, a 55-metre-long…
Stage 1 of the Mamre Road upgrade widens about 3.8 km of Mamre Road between the M4 Motorway at St Clair and Erskine Park Road at Erskine Park to a four-lane divided road with a wide central median, allowing…
An 11,200-hectare economic and urban transformation precinct on the doorstep of the new Western Sydney International (Nancy-Bird Walton) Airport. The Aerotropolis is being delivered through a coordinated $28…
2 further projects in St Marys are not listed here.
Combined values on this page exclude 1 whole-of-state program that reaches this area but are not local to it. Both are still listed above with their own values.
Denotes AI-based impression for illustrative purposes only, not to be taken as
definitive under any circumstances. Please follow links and conduct other
investigations from the project’s source for actual imagery. Developers and
project owners wishing us to use original imagery please Contact
Us and we will do so.
Beyond 2030: a further $235m across 1 project with completion dates further out — mostly precinct-scale programs whose dates are indicative. Kept out of the chart so the years you can act on stay readable.
Estimated value of tracked projects by the year they are due to complete, stacked by how certain they are. The dark band is money already being spent; the pale band is still an intention. Estimates are indicative and mix infrastructure cost with whole-of-precinct development value, so read the shape rather than the totals.
Development applications around St Marys
Loading development applications…
| Lodged | Address | Description | Type | Distance | Status |
|---|
SOURCE: Planning portals and council registers, compiled by AreaSearch. Distance & bearing measured from the suburb midpoint.
Applications and major projects plotted where they are actually proposed, with the 24 projects AreaSearch tracks here on their own tab — filterable by type, delivery stage, area and committed value. To search every application on record rather than this sample, use the section above.
Each area below opens a map builder on its own page — a tool for putting a map and a table into a report. Pick the place types you want plotted (schools, supermarkets, medical, child care, transport and the rest of what AreaSearch holds), add development applications as their own layer, drop your own points, then recolour, renumber and export the result as a table or CSV. A this area only toggle clips everything to the boundary you are looking at. Searches are charged against your credit balance — 1 credit per 40 results from AreaSearch data — and setting filters costs nothing until you search. The builder works on one suburb-sized area at a time, which is why it opens per area rather than across the whole of St Marys.
| Local government area | Share of St Marys | Applications on record | Register read to |
|---|---|---|---|
| Penrith | 100% of residents | 634 | June 2026 |
| Blacktown | 0.0% of residents | 32 | January 2026 |
The same view of building approvals, applications and major projects for areas neighbouring St Marys.
St Marys is Statistical Area Level 3 12405 in the ABS Australian Statistical Geography Standard (2021 edition), made up of 4 Statistical Areas Level 2. It has an estimated 59,830 residents, +5.4% since the 2021 Census.
| Measure | Source | To |
|---|---|---|
| Dwelling approvals, five-year average | ABS / AreaSearch | June 2026 |
| House share of approvals | ABS / AreaSearch | June 2026 |
| Residents per approval | ABS / AreaSearch | June 2026 |
| Value per approved dwelling | ABS / AreaSearch | June 2026 |
| Commercial work approved | ABS / AreaSearch | June 2026 |
| Verified new addresses since the Census | Address register / AreaSearch | May 2026 |
| Development applications | Council planning portals | June 2026 |
| Major projects | Infrastructure Australia / state agencies / AreaSearch | Ongoing |
Figures on this page are read live from the AreaSearch database each time it loads, so they update as soon as a source does.
The ABS recorded 268 dwelling approvals across St Marys in the 2024-25 financial year, against a five-year average of 272 a year.
AreaSearch tracks 666 development applications of material scale across St Marys — routine minor works such as signage and fencing are not included, so this is not a count of every application lodged, of which 88 remain in assessment. Applications are assessed within the Penrith and Blacktown local government areas. The most recent application in our data was lodged in June 2026.
AreaSearch tracks 17 current major projects in St Marys, 6 of them under construction. The largest include St Marys Station Upgrade and Metro Integration, Mamre Road Upgrade - M4 Motorway to Erskine Park Road (Stage 1) and Western Sydney Aerotropolis Infrastructure and Development.
St Marys is an ABS Statistical Area Level 3. It is covered by parts of 2 local government areas — Penrith and Blacktown. AreaSearch publishes development figures at ABS statistical boundaries rather than council boundaries, so they reconcile with the official ABS series.
On development approvals, St Marys is adding new dwellings more slowly than New South Wales as a whole — 0.38 approvals per 100 existing dwellings a year against the state figure of 0.59.
ABS building approvals are published with a lag of roughly four months; this page carries the series to June 2026. Development applications are collected from council planning portals and refresh continuously, with the most recent application here lodged in June 2026. Major project records are reviewed on an ongoing basis. Each section carries its own currency label so the four are never confused.
Development data is provided for general information. Estimated values, dwelling counts and delivery dates come from the lodging or delivering party and are not independently verified by AreaSearch. Confirm anything material with the relevant council or agency before relying on it.