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William St, Blacktown NSW 2148

Street

Street Summary

William St, Blacktown NSW 2148 sits below the suburb's house median. The street is predominantly house stock at 87%, with no apartments. All 73 homes sit level with the street. 18 homes are in a flood overlay, 38 are recommended for a flood check, and 28 have other flood classifications. A local road with no speed limit data, it had 3 house sales in the past year.


PART 1
Street Profile

Property Type Mix

The mix of houses and apartments (units) that make up the William St, Blacktown NSW 2148 property market.

Houses vs Apartments97 total lots
86.6%
13.4%
Houses (86.6%)
Apartments (0%)
Townhouses/Villas/Unclassified (13.4%)

PART 2
Houses

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

Land Topography

How house lots on William St, Blacktown NSW 2148 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
Flat
73 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
18 houses affected
High voltage power line
0 houses affected

Street Sales - Houses

Actual house sales on William St, Blacktown NSW 2148 over the past 5 years, plotted against the Blacktown NSW 2148 median house price trend over the same period.

Street sales vs suburb median
Street SalesSuburb Median Price
$0$500k$1.0M$1.5M$2.0MSept 21May 23Jan 25Sept 26$895k · 2022$947k · 2023$1M · 2024$1.1M · 2025$1.2M · 2026$880k · 2023-11-29 · 72 WILLIAM ST, BLACKTOWN NSW 2148$1.2M · 2025-08-22 · 81 WILLIAM ST, BLACKTOWN NSW 2148$723k · 2022-09-03 · 40 WILLIAM ST, BLACKTOWN NSW 2148$1.1M · 2025-07-26 · 27 WILLIAM ST, BLACKTOWN NSW 2148$1.1M · 2023-11-03 · 29 WILLIAM ST, BLACKTOWN NSW 2148$1.1M · 2025-11-26 · 36 WILLIAM ST, BLACKTOWN NSW 2148$1.1M · 2022-01-23 · 54 WILLIAM ST, BLACKTOWN NSW 2148$1.2M · 2024-06-02 · 56 WILLIAM ST, BLACKTOWN NSW 2148$832k · 2022-09-07 · 60 WILLIAM ST, BLACKTOWN NSW 2148$775k · 2023-03-01 · 63 WILLIAM ST, BLACKTOWN NSW 2148$810k · 2022-04-30 · 65 WILLIAM ST, BLACKTOWN NSW 2148$727k · 2023-03-04 · 85 WILLIAM ST, BLACKTOWN NSW 2148$1.2M · 2023-05-13 · 45 WILLIAM ST, BLACKTOWN NSW 2148
Street price-7%vs suburb median
Turnover rate15.5%Past 5 years

PART 3
Apartments

Street Sales - Apartments

Actual apartment (unit) sales on William St, Blacktown NSW 2148 over the past 5 years, plotted against the Blacktown NSW 2148 median apartment price trend over the same period.

Street sales vs suburb median
Suburb Median Price
$0$125k$250k$375k$500kSept 21May 23Jan 25Sept 26$440k · 2022$460k · 2023$460k · 2024$450k · 2025$470k · 2026
Apartment sales0Past 12 months
Turnover rate0%Past 5 years

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Living in William St, Blacktown NSW 2148 : Street Profile & FAQs

Common questions about living on and buying property on William St, Blacktown NSW 2148 — 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 William St an expensive or affordable street relative to Blacktown?

House prices on William St sit 7.17% below the Blacktown suburb house median, making it a relatively affordable option compared to the broader area.

What are the risk and overlay factors on William St?

There are no bushfire or heritage overlays on William St, but 18 properties fall within a flood overlay and 38 are recommended for a flood check. An additional 28 properties have been reviewed and found to have no flood risk identified or not mapped. Flood overlays do not necessarily mean a property floods, but it is worth reviewing council mapping, flood reports and insurance costs before purchasing. Flood Check Recommended means the property is recommended for further assessment.

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

73 homes sit level with the street.

What type of road is William St?

William St is a local road, which generally serves nearby residents rather than carrying through traffic.

Is William St mostly houses or apartments?

William St has 97 residential properties, with 86.6% being houses and 0% being apartments.

What are the major apartment developments on William St?

No major apartment developments are recorded on William St.

How many properties have sold on William St?

3 houses sold in the past 12 months, while no apartments were sold. The 5-year turnover rate for houses is 15.5%, which represents the proportion of properties that changed ownership during the past five years.

Is William St a good street to buy property on?

William St is best suited for buyers looking for detached houses on a local road. With prices sitting below the Blacktown median, it offers relative affordability, though buyers should review flood mapping and insurance costs due to the overlay and recommended flood check counts.