4/21 Guilfoyle Avenue, Double Bay NSW 2028
Double Bay Unit
Technical details
How this sale compares
The 2015 sale was 37% below the Double Bay median unit price for that year ($1,344,500 across 140 sales).
Since then the median unit price in Double Bay has risen 71%, from $1,344,500 in 2015 to $2,300,000 over the last 12 months (69 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.
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.
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 | |||
|---|---|---|---|---|---|---|
| 13 Jul 2015 | 24 Aug 2015 | $850,000 | - | - | - | 4/SP40012 |
$850,000 Sold 13 Jul 2015
Settled24 Aug 2015
Beds-
Baths-
Cars-
Title reference: 4/SP40012
Other sales at 21 Guilfoyle Avenue
The most recent sales of other units in this building. See every sale in the building.
| Beds | Baths | Cars | Title reference | ||||
|---|---|---|---|---|---|---|---|
| 7 | 15 Dec 2025 | 27 Jan 2026 | $1,500,000 | - | - | - | 7/SP40012 |
| 3 | 20 Aug 2025 | 18 Nov 2025 | $1,925,000 | - | - | - | 3/SP40012 |
| 9 | 10 Apr 2025 | 22 May 2025 | $1,460,000 | - | - | - | 9/SP40012 |
| 5 | 3 Mar 2025 | 7 Mar 2025 | $1,300,000 | - | - | - | 5/SP40012 |
| 7 | 14 Dec 2024 | 28 Jan 2025 | $1,300,000 | - | - | - | 7/SP40012 |
| 8 | 21 Sep 2021 | 1 Nov 2021 | $1,575,000 | - | - | - | 8/SP40012 |
| 9 | 4 Aug 2020 | 15 Sep 2020 | $1,075,000 | - | - | - | 9/SP40012 |
| 9 | 6 Nov 2018 | 30 Jan 2019 | $1,105,000 | - | - | - | 9/SP40012 |
| 6 | 28 Sep 2018 | 14 Dec 2018 | $1,085,000 | - | - | - | 6/SP40012 |
| 1 | 15 Nov 2016 | 20 Dec 2016 | $1,085,000 | - | - | - | 1/SP40012 |
$1,500,000 Sold 15 Dec 2025
Title reference: 7/SP40012
$1,925,000 Sold 20 Aug 2025
Title reference: 3/SP40012
$1,460,000 Sold 10 Apr 2025
Title reference: 9/SP40012
$1,300,000 Sold 3 Mar 2025
Title reference: 5/SP40012
$1,300,000 Sold 14 Dec 2024
Title reference: 7/SP40012
$1,575,000 Sold 21 Sep 2021
Title reference: 8/SP40012
$1,075,000 Sold 4 Aug 2020
Title reference: 9/SP40012
$1,105,000 Sold 6 Nov 2018
Title reference: 9/SP40012
$1,085,000 Sold 28 Sep 2018
Title reference: 6/SP40012
$1,085,000 Sold 15 Nov 2016
Title reference: 1/SP40012
Recent sales on Guilfoyle Avenue
Sold in the last two years.
- 8/9 Guilfoyle Ave, Double Bay 2028 $1,166,666 sold 9 Oct 2026
- 3/11 Guilfoyle Ave, Double Bay 2028 $7,000,000 sold 20 Apr 2026
- 2/11 Guilfoyle Ave, Double Bay 2028 $10,000,000 sold 10 Oct 2025
- 2/9 Guilfoyle Ave, Double Bay 2028 $1,300,000 sold 3 Mar 2025
- 18 Guilfoyle Avenue, Double Bay 2028 $1,702,000 sold 18 Dec 2024, 158 m²
- 4/11 Guilfoyle Ave, Double Bay 2028 $5,525,000 sold 18 Nov 2024
Recent sales nearby
Sold in the last 12 months within about 400 metres.
- 3 A/2 Knox St, Double Bay 2028 $4,950,000 sold 15 Sep 2026
- 23/337 New South Head Rd, Double Bay 2028 $2,490,000 sold 5 Sep 2026
- 12/17 Knox St, Double Bay 2028 $1,045,000 sold 21 Aug 2026
- 2/95 Darling Point Rd, Darling Point 2027 $3,300,000 sold 12 Aug 2026
- 5/28 William St, Double Bay 2028 $1,860,000 sold 7 Aug 2026
- 7/2 Marathon Rd, Darling Point 2027 $1,910,000 sold 4 Aug 2026
- 6/65 Darling Point Rd, Darling Point 2027 $1,120,000 sold 1 Aug 2026
- 10/30 William St, Double Bay 2028 $1,600,000 sold 31 Jul 2026