St Marys property prices split into two markets that behave nothing alike. Houses sit near a $1.19 million median. Units sit near $690,000.
That gap matters more than any suburb-wide headline. What follows is what houses and units in St Marys NSW 2760 have actually sold for, street by street.
Written by Daniel Whitfield, founder of Australia Develops, who has personally bought, subdivided, and built property across Australia.
What Houses and Units Sell For in St Marys
Houses carry a median near $1.19 million while units sit close to $690,000 — but units return the stronger yield.
| Measure | Houses | Units |
|---|---|---|
| Median sale price | $1,190,000 | $690,000 |
| Median rent | $570 per week | $580 per week |
| Rental yield | 2.8% | 4.3% |
| Sales counted | 119 | not stated |
Those figures come from Property.com.au, using PropTrack data covering the 12 months to July 2026.
The rent columns are the surprising part. Unit rent sat $10 per week above house rent, on a median price roughly $500,000 lower.
Houses in St Marys are land-heavy. Buyers pay for the block, and the rent does not scale with land value, which compresses the yield.
Units carry no such land premium. That is why the same suburb produces a 2.8% yield on one property type and 4.3% on another.
Why Domain and PropTrack Show Different Medians
Domain reports St Marys by bedroom count rather than as one house median, which produces lower headline numbers.
Neither portal is wrong. They use different datasets, different property groupings and different calculation methods over different sale sets.
The practical rule is to treat the two as a range rather than a valuation. Mixing a Domain bedroom median with a PropTrack suburb median produces a number that describes nothing.
This matters for anyone comparing St Marys against other Western Sydney centres such as Bankstown or Leppington. Compare like sources, not like suburbs.
Recent Sale Evidence, Street by Street
Detached sales clustered on larger blocks around Lonsdale, Tidswell and Beresford Streets. Apartment sales clustered around Carson Lane.
| Address | Sale price | Detail |
|---|---|---|
| 25 Lonsdale Street | $1,190,000 | 5 bed, 3 bath, 537 m² |
| 21 Tidswell Street | $1,450,000 | 974 m² |
| 6 Beresford Street | $1,250,000 | 752 m² |
| 505/12A Carson Lane | $649,000 | 2 bed, 2 bath, 1 car |
| 101/12C Carson Lane | $660,000 | 2 bed, 2 bath, 1 car |
| 402/12B Carson Lane | $650,000 | 2 bed, 2 bath, 1 car |
Land size explains most of the spread. Tidswell Street sold at $1.45 million on 974 square metres, against $1.19 million on 537 square metres at Lonsdale Street.
The three Carson Lane apartments landed within $11,000 of each other. Comparable stock in one building group produces a tight band, which makes apartment valuation more predictable than house valuation here.
Townhouse stock around Mamre Road and the Great Western Highway sits between the two. It is a third product again, and neither the house median nor the unit median describes it.
What Sits Behind the Numbers
St Marys falls inside Penrith City Council. Three separate things are changing the streets those sales sit on.
Sydney Metro confirms the new metro station will sit beneath the existing Sydney Trains station, with entries on Station Street and Harris Street.
NSW Planning lists St Marys Metro under the Transport Oriented Development program, with Penrith council controls applied in February 2026. The wider program is covered in our TOD rezoning guide.
Penrith City Council scheduled early works on the St Marys Central Park project for early June 2026, with completion anticipated in early 2028, weather permitting.
None of that applies evenly. A block on Station Street and a block in an established low-density street four suburbs deep sit under different controls.
The NSW Planning Spatial Viewer is where a specific parcel gets checked. Penrith City Council holds the Local Environmental Plan that sets height, floor space and parking.
Checks That Change the Number
Sale evidence is only comparable once the site constraints match. Four checks move a St Marys valuation more than the street name does.
Flood and contamination history — the mapping tools are set out in our guide to flood and bushfire maps.
Registered easements, which can cut the buildable envelope before design starts. Our easements guide covers how to find them on title.
Slope and site costs, which sit outside most base build quotes. See sloping block site costs.
Broader market direction, covered in our analysis of the Sydney price cycle and the Western Sydney Airport timeline.
St Marys Property Prices: Key Data at a Glance
| Metric | Figure | Source |
|---|---|---|
| Median house price | $1,190,000 | PropTrack, 12 months to July 2026 |
| Median unit price | $690,000 | PropTrack, 12 months to July 2026 |
| House rent / yield | $570 per week / 2.8% | PropTrack |
| Unit rent / yield | $580 per week / 4.3% | PropTrack |
| House sales counted | 119 | PropTrack |
| Highest listed sale | $1,450,000 — 21 Tidswell Street | Property.com.au |
| Council | Penrith City Council | — |
| TOD controls applied | February 2026 | NSW Planning |
| Central Park works | June 2026 to early 2028 | Penrith City Council |
Summary
St Marys is not one market. Houses and units in the same postcode produced a 1.5 percentage point yield gap over the same 12 months.
Land size drove the house spread, from $1.19 million on 537 square metres to $1.45 million on 974. Apartment sales around Carson Lane held within a $11,000 band.
Anyone reading St Marys property prices off a single suburb median is reading the wrong number.
The street, the land size, the planning controls and the constraints decide what a specific property is worth.
Sydney Metro reported the first of 12 airport metro trains arrived in Sydney on 6 July 2026. The sale evidence here will keep moving.
What is the median house price in St Marys NSW?
Property.com.au, using PropTrack data for the 12 months to July 2026, listed the St Marys median house price at $1,190,000 from 119 recorded sales. Domain listed lower medians because it separates results by bedroom count.
Are units in St Marys a better yield than houses?
On the same portal data, units showed a 4.3% rental yield against 2.8% for houses. Unit rent was $580 per week and house rent $570, on a much lower median price. Yield excludes strata costs, vacancy and land value.
Why do Domain and Property.com.au show different St Marys medians?
The two portals use different datasets, group property types differently and calculate medians over different sale sets. Domain splits houses by bedroom count while PropTrack reports a single house median. Treat them as a range, not as competing valuations.
Which St Marys streets have recorded the highest sale prices?
Among listed sales, 21 Tidswell Street recorded $1,450,000 on 974 square metres and 6 Beresford Street $1,250,000 on 752 square metres. Larger land size, not the street name alone, drove those results.
This article is general information only and is not financial, legal or planning advice. See the Disclaimer for details.
