8/18 Countess Street, Mosman NSW 2088
3 bed1 bath1 car152 m² floorBuilt 1936
Secure buildingPet-friendly buildingDistrict viewsFloor-to-ceiling windows
PropertyCheck estimate
$1,989,000
as at Jun 2026
Statistical model estimate, not a professional valuation. Range reflects a ±6.3% model deviation based on 6 comparable sales. Do not rely on it for lending or legal decisions.
Rental estimate
$1320/wk
Range $1215–$1425 · gross yield 3.5%
Buying costs snapshot
Stamp duty ≈ $91,804 (NSW)
Repayments ≈ $9,438/mo (80% LVR, 5.9%, 30y)
Estimated value over time
Today's estimate carried back along the Mosman unit price index.
Sales history
| Date | Sale price | Change |
|---|---|---|
| 21 Jun 2023 | $1,771,500 | -1% |
| 28 Nov 2022 | $1,785,500 | +15% |
| 4 Apr 2020 | $1,555,000 | — |
The evidence behind this estimate
Recent comparable sales, indexed to today and adjusted for attribute differences. This is the transparency most estimators keep behind a paywall.
1/39 Killarney Street, Mosman
Unit · 3 bed · 1 bath · 1 car · 0.9 km away
$1,918,000
20 May 2025
≈ $2.14m adjusted
2/46 Killarney Street, Mosman
Unit · 3 bed · 1 bath · 1 car · 0.9 km away
$1,777,000
6 Mar 2026
≈ $1.99m adjusted
19/50 Ourimbah Road, Mosman
Unit · 3 bed · 1 bath · 1 car · 1.3 km away
$1,697,000
9 Jan 2024
≈ $2.00m adjusted
4/164 Cowles Road, Mosman
Unit · 3 bed · 1 bath · 1 car · 0.7 km away
$1,980,000
10 Aug 2024
≈ $2.30m adjusted
12/108 Raglan Street, Mosman
Unit · 3 bed · 1 bath · 1 car · 0.9 km away
$1,798,500
9 Feb 2026
≈ $2.01m adjusted
6/171 Bradleys Head Road, Mosman
Unit · 3 bed · 1 bath · 1 car · 1.2 km away
$1,646,000
11 Mar 2026
≈ $1.90m adjusted