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Trelawney St, Thornleigh NSW 2120

Street

Street Summary

Trelawney St, Thornleigh NSW 2120 is a local road in Thornleigh where 52% of residences are houses. 11 homes sit above the street; 4 homes sit level with the street; 7 homes sit below the street. 7 homes are recommended for a flood check. There are insufficient recent house sales to calculate a reliable comparison against the suburb, so buyers should compare recent sales of individual homes on the street against nearby comparable properties.


PART 1
Street Profile

Property Type Mix

The mix of houses and apartments (units) that make up the Trelawney St, Thornleigh NSW 2120 property market.

Houses vs Apartments46 total lots
52.2%
47.8%
Houses (52.2%)
Apartments (0%)
Townhouses/Villas/Unclassified (47.8%)

PART 2
Houses

"Houses" in this report includes detached houses, duplexes, and terraces.

Land Topography

How house lots on Trelawney St, Thornleigh NSW 2120 sit relative to street level — topography that affects drainage, flood risk, privacy, and build cost. Statistics are calculated from properties with available data.

High-side vs low-side house lots
High-sideFlatLow-side
11 lots
4 lots
7 lots
High-side (1m above)
Flat
Low-side (1m below)

Risks &Overlays

See which key planning overlays and environmental risks affect this street before you buy.

Heritage
0 houses affected
Bushfire
0 houses affected
Flood
0 houses affected
High voltage power line
0 houses affected

Street Sales - Houses

Actual house sales on Trelawney St, Thornleigh NSW 2120 over the past 5 years, plotted against the Thornleigh NSW 2120 median house price trend over the same period.

Street sales vs suburb median
Street SalesSuburb Median Price
$0$1.3M$2.5M$3.8M$5.0MSept 21May 23Jan 25Sept 26$1.7M · 2022$1.8M · 2023$1.9M · 2024$1.9M · 2025$1.8M · 2026$2.1M · 2025-09-27 · 10 TRELAWNEY ST, THORNLEIGH NSW 2120$1.5M · 2021-11-22 · 1/7A TRELAWNEY ST, THORNLEIGH NSW 2120$1.7M · 2024-11-06 · 23 TRELAWNEY ST, THORNLEIGH NSW 2120$2.2M · 2025-08-09 · 4A TRELAWNEY ST, THORNLEIGH NSW 2120$2.1M · 2022-09-15 · 18 TRELAWNEY ST, THORNLEIGH NSW 2120$2.4M · 2025-04-26 · 18 TRELAWNEY ST, THORNLEIGH NSW 2120
Turnover rate25%Past 5 years

PART 3
Apartments

Street Sales - Apartments

Actual apartment (unit) sales on Trelawney St, Thornleigh NSW 2120 over the past 5 years, plotted against the Thornleigh NSW 2120 median apartment price trend over the same period.

Street sales vs suburb median
Suburb Median Price
$0$250k$500k$750k$1.0MSept 21May 23Jan 25Sept 26$810k · 2022$700k · 2023$740k · 2024$787k · 2025$650k · 2026
Apartment sales0Past 12 months
Turnover rate0%Past 5 years

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Living in Trelawney St, Thornleigh NSW 2120 : Street Profile & FAQs

Common questions about living on and buying property on Trelawney St, Thornleigh NSW 2120 — lifestyle, transport, and the local housing market.

Note: Data is sourced from the Australian Bureau of Statistics (ABS) 2021 Census data and knest.ai internal statistical data.

Is Trelawney St an expensive or affordable street relative to Thornleigh?

There are insufficient recent house sales on Trelawney St to calculate a reliable premium or discount against the Thornleigh average. Buyers should compare recent sales of individual homes on the street against nearby comparable properties to gauge current market positioning.

What are the risk and overlay factors on Trelawney St?

There is no bushfire, heritage, or flood overlay risk on Trelawney St, and no properties are affected by high-voltage powerlines. However, 7 homes are recommended for a flood check, meaning they require further assessment. Additionally, 17 properties fall under other flood classifications, indicating no flood risk has been identified or they have not been mapped. Buyers should review council mapping and insurance costs before purchasing.

Are properties on Trelawney St mostly on high, level or low ground?

11 homes sit above the street; 4 homes sit level with the street; 7 homes sit below the street. Different site heights relative to the street can influence site characteristics, but specific outcomes depend on the individual property. Buyers should assess the specific property rather than relying on the street average.

What type of road is Trelawney St?

Trelawney St is a local road, which generally serves nearby residents. As the speed limit and traffic data are unavailable, it is not possible to make specific observations about traffic levels or congestion on the street.

Is Trelawney St mostly houses or apartments?

There are 46 residential properties on Trelawney St. Houses make up 52.2% of the residential stock, while apartments make up 0%. The street is predominantly houses.

What are the major apartment developments on Trelawney St?

No major apartment developments are recorded on Trelawney St.

How many properties have sold on Trelawney St?

2 houses sold in the past 12 months, while 0 apartments sold. The 5-year turnover rate for houses is 25%, representing the proportion of properties that changed ownership during the past five years. Apartment turnover data is unavailable.

Is Trelawney St a good street to buy property on?

Trelawney St may be aligned with buyers looking for detached houses on a local road, or those comfortable with a mixed profile of homes sitting above, level with, and below the street. The street features a mix of risk overlays, including flood checks and other flood classifications, alongside no bushfire or heritage restrictions. Buyers should weigh these trade-offs against their specific needs.