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William St, Double Bay NSW 2028

Street

Street Summary

William St, Double Bay NSW 2028 is an arterial road with a 50km/h limit where 97.4% of stock fronts the carriageway. The street is dominated by apartments, which make up 82.6% of residential properties, while houses account for 8%. 19 homes sit level with the street. One property is heritage-listed, two have a flood overlay, and 26 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. Notable developments include 51 William St (98 lots, 5 levels, built 2001), 41 William St (50 lots, 4 levels, built 1968), and 20 William St (13 lots, 3 levels, built 1967).


PART 1
Street Profile

Property Type Mix

The mix of houses and apartments (units) that make up the William St, Double Bay NSW 2028 property market.

Houses vs Apartments351 total lots
8%
82.6%
9.4%
Houses (8%)
Apartments (82.6%)
Townhouses/Villas/Unclassified (9.4%)

Street Class & Speed Limit

The road classification and posted speed limit along William St, Double Bay NSW 2028. Road class and speed limit can each vary from section to section; the dominant setting along the street is shown here.

Dominant road class & speed limitARTERIAL ROAD · 50 km/h97.4% of properties front this section

PART 2
Houses

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

Land Topography

How house lots on William St, Double Bay NSW 2028 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
19 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
1 houses affected
Bushfire
0 houses affected
Flood
2 houses affected
High voltage power line
0 houses affected

Street Sales - Houses

Actual house sales on William St, Double Bay NSW 2028 over the past 5 years, plotted against the Double Bay NSW 2028 median house price trend over the same period.

Street sales vs suburb median
Street SalesSuburb Median Price
$0$2.5M$5.0M$7.5M$10.0MSept 21May 23Jan 25Sept 26$6M · 2022$5.9M · 2023$7.5M · 2024$7.2M · 2025$5.1M · 2025-03-25 · 42 WILLIAM ST, DOUBLE BAY NSW 2028
Turnover rate3.6%Past 5 years

PART 3
Apartments

Street Sales - Apartments

Actual apartment (unit) sales on William St, Double Bay NSW 2028 over the past 5 years, plotted against the Double Bay NSW 2028 median apartment price trend over the same period.

Street sales vs suburb median
Street SalesSuburb Median Price
$0$2.5M$5.0M$7.5M$10.0MSept 21May 23Jan 25Sept 26$1.9M · 2022$1.7M · 2023$1.8M · 2024$2M · 2025$1.9M · 2026$1.3M · 2024-08-30 · 6/20 WILLIAM ST, DOUBLE BAY NSW 2028$3M · 2022-09-20 · 3/21 WILLIAM ST, DOUBLE BAY NSW 2028$2M · 2025-06-07 · 1/30 WILLIAM ST, DOUBLE BAY NSW 2028$1.8M · 2025-03-29 · 11/30 WILLIAM ST, DOUBLE BAY NSW 2028$1.6M · 2022-01-18 · 12/30 WILLIAM ST, DOUBLE BAY NSW 2028$2M · 2021-10-07 · 2/30 WILLIAM ST, DOUBLE BAY NSW 2028$1.6M · 2022-05-07 · 3/26A WILLIAM ST, DOUBLE BAY NSW 2028$1.9M · 2026-08-07 · 5/28 WILLIAM ST, DOUBLE BAY NSW 2028$2.9M · 2023-08-14 · 52/41 WILLIAM ST, DOUBLE BAY NSW 2028$2.9M · 2024-12-04 · 52/41 WILLIAM ST, DOUBLE BAY NSW 2028$1.4M · 2024-03-21 · 6/41 WILLIAM ST, DOUBLE BAY NSW 2028$1.6M · 2024-09-26 · 1/50 WILLIAM ST, DOUBLE BAY NSW 2028$1.6M · 2024-02-13 · 2/50 WILLIAM ST, DOUBLE BAY NSW 2028$1.9M · 2025-12-12 · 3/48 WILLIAM ST, DOUBLE BAY NSW 2028$1.5M · 2023-05-13 · 5/50 WILLIAM ST, DOUBLE BAY NSW 2028$970k · 2023-05-17 · 4/63 WILLIAM ST, DOUBLE BAY NSW 2028$1.1M · 2025-08-27 · 8/63 WILLIAM ST, DOUBLE BAY NSW 2028$2M · 2022-10-15 · 10/41 WILLIAM ST, DOUBLE BAY NSW 2028$2.3M · 2022-09-26 · 13/41 WILLIAM ST, DOUBLE BAY NSW 2028$883k · 2025-04-16 · 22/41 WILLIAM ST, DOUBLE BAY NSW 2028$2.3M · 2023-06-29 · 27/41 WILLIAM ST, DOUBLE BAY NSW 2028$2.6M · 2024-12-06 · 30/41 WILLIAM ST, DOUBLE BAY NSW 2028$4.1M · 2021-11-26 · 19/51 WILLIAM ST, DOUBLE BAY NSW 2028$4M · 2025-11-17 · 13/51 WILLIAM ST, DOUBLE BAY NSW 2028$3.8M · 2025-08-10 · 3/51 WILLIAM ST, DOUBLE BAY NSW 2028$3.6M · 2024-04-19 · 6/51 WILLIAM ST, DOUBLE BAY NSW 2028$4.2M · 2024-03-01 · 24/51 WILLIAM ST, DOUBLE BAY NSW 2028$4.6M · 2023-09-06 · 47/51 WILLIAM ST, DOUBLE BAY NSW 2028$3.9M · 2022-05-27 · 34/51 WILLIAM ST, DOUBLE BAY NSW 2028$4.3M · 2024-09-18 · 35/51 WILLIAM ST, DOUBLE BAY NSW 2028$2.5M · 2024-02-23 · 11/10 WILLIAM ST, DOUBLE BAY NSW 2028$2.1M · 2025-06-20 · 11/10 WILLIAM ST, DOUBLE BAY NSW 2028$2.8M · 2025-10-31 · 1/55 WILLIAM ST, DOUBLE BAY NSW 2028$2.1M · 2024-04-29 · 7/10 WILLIAM ST, DOUBLE BAY NSW 2028$2M · 2025-06-13 · 7/10 WILLIAM ST, DOUBLE BAY NSW 2028$2.2M · 2025-11-14 · 6/10 WILLIAM ST, DOUBLE BAY NSW 2028$1.9M · 2024-06-19 · 2/10 WILLIAM ST, DOUBLE BAY NSW 2028$2M · 2024-09-27 · 3/10 WILLIAM ST, DOUBLE BAY NSW 2028$2M · 2023-12-11 · 8/10 WILLIAM ST, DOUBLE BAY NSW 2028$3M · 2024-02-16 · 1/10 WILLIAM ST, DOUBLE BAY NSW 2028$2.4M · 2024-03-15 · 12/10 WILLIAM ST, DOUBLE BAY NSW 2028$2.1M · 2024-11-13 · 12/10 WILLIAM ST, DOUBLE BAY NSW 2028$2M · 2024-11-14 · 4/10 WILLIAM ST, DOUBLE BAY NSW 2028$6.2M · 2025-09-05 · 13/10 WILLIAM ST, DOUBLE BAY NSW 2028
Apartment sales8Past 12 months
Turnover rate15.2%Past 5 years

Largest Apartment Projects

The largest apartment projects on William St, Double Bay NSW 2028, ranked by number of lots.

1
51 WILLIAM ST, DOUBLE BAY NSW 2028Medium project (51-100 lots)
2
41 WILLIAM ST, DOUBLE BAY NSW 2028Small-Medium project (20-50 lots)
3
20 WILLIAM ST, DOUBLE BAY NSW 2028Small project (<20 lots)

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Living in William St, Double Bay NSW 2028 : Street Profile & FAQs

Common questions about living on and buying property on William St, Double Bay NSW 2028 — 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 Double Bay?

There are insufficient recent house sales on William St to calculate a reliable premium or discount against the Double Bay 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 William St?

There are no bushfire or high-voltage powerline overlays on William St. One property is heritage-listed, which typically means renovations, extensions, or exterior changes may require additional council approval, reducing renovation flexibility. Two properties fall within a flood overlay, 26 are recommended for a flood check, and none fall under other flood classifications. A flood overlay or recommended flood check does not necessarily mean a property floods, but it is worth reviewing council mapping, flood reports and insurance costs before purchasing. Flood Check Recommended means recommended for further assessment. The other flood classification means the property has been reviewed and found to have no flood risk, or has not been assessed or mapped for flood.

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

19 homes sit level with the street. Different site heights relative to the street can influence site characteristics, but do not claim specific outcomes such as better views, poorer drainage, reduced flooding, or greater privacy, since these depend on the individual property. Encourage buyers to assess the specific property rather than relying on the street average.

What type of road is William St?

William St is an arterial road with a 50 km/h speed limit, and 97.4% of the residential stock fronts this dominant road section. Arterial roads generally carry more through traffic, which may mean higher traffic volumes compared to local residential streets.

Is William St mostly houses or apartments?

William St has 351 residential properties in total. Apartments make up 82.6% of the residential stock, while houses account for 8%. Because apartments clearly represent the majority of residential properties, the street is predominantly apartments.

What are the major apartment developments on William St?

The major apartment developments on William St include 51 William St with 98 lots across 5 levels built in 2001, 41 William St with 50 lots across 4 levels built in 1968, and 20 William St with 13 lots across 3 levels built in 1967. These developments contribute to the street's apartment presence or higher-density residential character.

How many properties have sold on William St?

8 apartments sold in the past 12 months, while no houses sold in that period. The 5-year turnover rate is 16.2% for apartments and 3.6% for houses. The turnover rate 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 an arterial road with a 50 km/h speed limit and a predominantly apartment stock. It may be more aligned with apartment buyers comfortable with a higher-density residential street. The street features one heritage-listed property and several properties with flood overlays or recommended flood checks, which require careful review. Buyers should consider these trade-offs alongside the street's structural characteristics.