21/18 Bay St, Double Bay NSW 2028
Double Bay Unit
Technical details
How this sale compares
Sold for $3,877,500 in Apr 2026, up $1,077,500 (38%) on the $2,800,000 paid in Jun 2016. That is about 3.4% a year over 9.9 years.
Over the same period the median unit price in Double Bay rose 19%, from $1,850,000 in 2016 to $2,200,000 in 2026.
The 2026 sale was 76% above the Double Bay median unit price for that year ($2,200,000 across 42 sales).
Double Bay medians use NSW Valuer General sales of $50,000 or more, leaving out part-interest transfers and contracts covering several properties, and need at least 10 sales in the period. See Double Bay sold prices by year.
Rent and yield
Units in postcode 2028 rented for a median $1,050 a week, from 331 bonds lodged Oct 2025 to Sep 2026.
On its last sale of $3,877,500 on 28 Apr 2026, that rent is a gross yield of 1.4% a year, before costs and vacancies.
Median weekly rents from residential rental bonds lodged with NSW Fair Trading, by postcode. This home's own rent may differ. See rents by bedrooms in Double Bay.
Planning controls
- Zone
- E1 Local Centre
- Maximum building height
- 14.7 m
- Floor space ratio
- 2.5:1 Floor area allowed for each square metre of site
From the Woollahra Local Environmental Plan 2014 maps on the NSW Planning Portal, looked up at this address's map point on 22 Oct 2026. A control can cover only part of a site and plans change, so the council's planning certificate is the formal record. Planning data from the NSW Department of Planning, Housing and Infrastructure, CC BY 4.0.
Related sales
Sale history
Sold is the contract date, when the sale was agreed. Settled is the date ownership transferred.
| Beds | Baths | Cars | Title reference | |||
|---|---|---|---|---|---|---|
| 28 Apr 2026 | 24 Aug 2026 | $3,877,500 | - | - | - | 3/SP91256 |
| 14 Jun 2016 | 15 Aug 2016 | $2,800,000 | - | - | - | 3/SP91256 |
| 22 Apr 2013 | 28 May 2015 | $2,750,000 | - | - | - | 3/SP91256 |
$3,877,500 Sold 28 Apr 2026
Settled24 Aug 2026
Beds-
Baths-
Cars-
Title reference: 3/SP91256
$2,800,000 Sold 14 Jun 2016
Settled15 Aug 2016
Beds-
Baths-
Cars-
Title reference: 3/SP91256
$2,750,000 Sold 22 Apr 2013
Settled28 May 2015
Beds-
Baths-
Cars-
Title reference: 3/SP91256
Other sales at 18 Bay St
The most recent sales of other units in this building. See every sale in the building.
| Beds | Baths | Cars | Title reference | ||||
|---|---|---|---|---|---|---|---|
| 32 | 15 Apr 2026 | 1 May 2026 | $3,275,000 | - | - | - | 9/SP91256 |
| 51 | 1 Mar 2025 | 27 May 2025 | $3,407,000 | - | - | - | 14/SP91256 |
| 22 | 25 Oct 2024 | 22 Jan 2025 | $3,500,000 | - | - | - | 4/SP91256 |
| 23 | 4 Aug 2020 | 27 Oct 2020 | $2,800,000 | - | - | - | 5/SP91256 |
| 32 | 25 May 2020 | 24 Aug 2020 | $3,075,000 | - | - | - | 9/SP91256 |
| 32 | 14 Jun 2019 | 18 Dec 2019 | $2,800,000 | - | - | - | 9/SP91256 |
| 24 | 27 Nov 2019 | 11 Dec 2019 | $3,700,000 | - | - | - | 6/SP91256 |
| 1 | 13 Oct 2017 | 24 Nov 2017 | $1,520,000 | - | - | - | 1/SP91256 |
| 42 | 18 Aug 2016 | 9 Nov 2016 | $5,300,000 | - | - | - | 13/SP91256 |
| 2 | 30 Apr 2016 | 14 Jun 2016 | $1,475,000 | - | - | - | 2/SP91256 |
$3,275,000 Sold 15 Apr 2026
Title reference: 9/SP91256
$3,407,000 Sold 1 Mar 2025
Title reference: 14/SP91256
$3,500,000 Sold 25 Oct 2024
Title reference: 4/SP91256
$2,800,000 Sold 4 Aug 2020
Title reference: 5/SP91256
$3,075,000 Sold 25 May 2020
Title reference: 9/SP91256
$2,800,000 Sold 14 Jun 2019
Title reference: 9/SP91256
$3,700,000 Sold 27 Nov 2019
Title reference: 6/SP91256
$1,520,000 Sold 13 Oct 2017
Title reference: 1/SP91256
$5,300,000 Sold 18 Aug 2016
Title reference: 13/SP91256
$1,475,000 Sold 30 Apr 2016
Title reference: 2/SP91256
Recent sales on Bay St
Sold in the last two years.
- 3/61-63 Bay Street, Double Bay 2028 $8,050,000 sold 25 Mar 2025
- 7/69 Bay Street, Double Bay 2028 $3,750,000 sold 23 Mar 2025
- 5/61-63 Bay Street, Double Bay 2028 $10,000,000 sold 20 Mar 2025
- 8/69 Bay Street, Double Bay 2028 $5,000,000 sold 6 Mar 2025
Recent sales nearby
Sold in the last 12 months within about 400 metres.
- 8/9 Guilfoyle Ave, Double Bay 2028 $1,166,666 sold 9 Oct 2026
- 3 A/2 Knox St, Double Bay 2028 $4,950,000 sold 15 Sep 2026
- 9/347 Edgecliff Rd, Edgecliff 2027 $1,160,000 sold 14 Sep 2026
- 23/337 New South Head Rd, Double Bay 2028 $2,490,000 sold 5 Sep 2026
- 3/123 Ocean St, Edgecliff 2027 $1,300,000 sold 26 Aug 2026
- 12/17 Knox St, Double Bay 2028 $1,045,000 sold 21 Aug 2026
- 5/28 William St, Double Bay 2028 $1,860,000 sold 7 Aug 2026
- 10/30 William St, Double Bay 2028 $1,600,000 sold 31 Jul 2026