← Board · Double Bay — prices, sales, schools, crime

21 Guilfoyle Avenue, Double Bay

Strata plan SP40012 · 9 lots (NSW Strata Hub) · registered 1991-11-04 (age floor) · VG property id 2089205

This building has 8 recorded sales since 2015. Every figure below is a government record with its source named — and the last section lists what the public record cannot tell you.

21 Guilfoyle Ave, Double Bay 2028 is a 9-lot building with 8 recorded sales since 2015, including 5 in the last 3 years. In the postcode, 1-bedroom apartments have a median rent of $815/wk, with the middle half of rents at $662–$900/wk. 2-bedroom apartments have a median of $1075/wk ($925–$1250/wk for the middle half), and 3-bedroom apartments have a median of $2250/wk ($1545–$2600/wk).

Written by AI from the government records on this page — checked figure-by-figure against them (2026-08-27). A description of the record, never advice.

Every sale in this building

8 priced transfers on the public record since 2015.

In the last three years, 5 lots changed hands — 56% of the scheme's 9 lots. Trailing 36 months of VG transfers ÷ registered lot count.

Unit 7$1.5M2025-12-15

Unit 3$1.93M2025-08-20

Unit 9$1.46M2025-04-10

Unit 5$1.3M2025-03-03

Unit 7$1.3M2024-12-14

Unit 8$1.57M2021-09-21

NSW Valuer General bulk property sales information (CC-BY), every lot sharing this building's property id; unit labels are the register's own strings. Transfers under 3 months apart are excluded as double entries; growth figures are gross price movements, not returns.

What units here actually rent for

1-bed$662–$900/wkmedian $81515 bonds, Q2 2026

2-bed$925–$1250/wkmedian $107553 bonds, Q2 2026

3-bed$1545–$2600/wkmedian $225014 bonds, Q2 2026

Real transacted rents — every residential bond lodged in postcode 2028 (NSW Fair Trading, CC-BY). Postcode is the finest geography the source publishes; the middle half (25th–75th percentile) is shown because identical floor plans in one building can lease hundreds apart.

Nearby buildings with dossiers

9 Manning Rd8 sales · 8 lots

526 New South Head Rd8 sales · 20 lots

484 New South Head Rd8 sales · 8 lots

45 Ocean Ave45 sales · 82 lots · 92% of resales above purchase

539 New South Head Rd32 sales · 42 lots · 100% of resales above purchase

What this dossier cannot tell you

Stated so a gap never reads as a clean bill (rule 7's positive form — silence is not evidence):

The strata books. Levies, the capital-works (sinking) fund, insurance, AGM minutes, and any defect claims in progress are not public records. Only a strata report — a paid inspection of the owners corporation's own books — has them. If you are serious about a unit here, buy that report; nothing on this page substitutes for it.
When the building was actually completed. The 1991 registration date is a floor — the scheme existed by then. Occupation certificates aren't in our sources; a conveyancer can obtain them.
Bedrooms on sales records. The Valuer General publishes no bedroom counts, so the sales above are every configuration pooled — a $732k sale and a $1.38M sale may be different-sized homes, not a price swing.
This building's own rents. Bond data is postcode-grain — the ranges above are the area's real transactions, not this building's ledger.
Why any individual vendor is selling. The patterns above are the building's record; no line on this page is a claim about a particular home or owner.

© State of New South Wales (Spatial Services, a business unit of the Department of Customer Service NSW). For current information go to spatial.nsw.gov.au. VG figures: NSW Valuer General bulk property sales information (CC-BY). Every fact above names its source; where a source doesn't cover this building, the section doesn't appear.