Flat 1, 28 Onslow Gardens, London, SW7 3AG is a leasehold flat built between 1900-1929. The property offers approximately 1,399 square feet of living space and is situated on the 1st floor. In this location, apartments of similar size usually have five bedrooms.

The estimated current market value of the property is £1,929,849 , which equates to approximately £1,379 per square foot. It was last sold on 12 Sep 2017 for £2,045,000. Since then, the value has decreased by £115,151, representing a 5.6% decrease, or approximately 0.7% per year.

The current estimated value of £1,929,849 is:

  • 32.3% higher than the average property price on Onslow Gardens
  • 55.1% higher than the average in the SW7 3AG postcode area
  • and 120.5% higher than the average price for London as a whole

Based on EPC inspection history, this property has been mostly owner-occupied (2 out of 3 inspections). This suggests the property has typically been lived in by its owners, which often reflects longer-term residency and more consistent maintenance.

At the most recent EPC inspection on 4 March 2025, the property was recorded as owner-occupied.

View sold house prices in SW7 3AG

Building approximate location

About Property

Type
Flat
Built
1900-1929
Interior Size
1399 sq ft
Tenure
Leasehold
Floor level
1st floor
Price (estimate)
£1,929,849
Price Per sq ft (estimate)
£1,379
Bedroom Count (estimate)
5 bedrooms

EPC Summary

Flat 1, 28 Onslow Gardens, London, Kensington And Chelsea, Greater London, SW7 3AG has an Energy Performance Certificate (EPC) rating of C, based on the latest assessment carried out on 4 Mar 2025.

This property uses a gas-fired boiler and radiators, connected to the mains gas supply, as its main heating source. Hot water is provided from main heating system. The windows have some double glazing.

The previous EPC assessment was conducted on 14 Feb 2023. The rating of C remains the same, but the energy efficiency score improved by 2.8%.

Since the previous assessment, several changes were observed:

  • The wall energy efficiency changing from poor to very poor, with the construction or insulation remaining solid brick, as built, no insulation (assumed).
  • The windows were upgraded from partial double glazing to some double glazing.
Heating Type
Boiler and radiators, mains gas
Good
Hot Water
From main system
Good
Walls
Solid brick, as built, no insulation (assumed)
Very Poor
Windows
Some double glazing
Poor
Lighting
Low energy lighting in all fixed outlets
Very Good

Compared to SW7 3AG

2 nd / 22
Price Rank
55% higher than average
2 nd / 10
Size Rank
75% bigger than average
1 st / 10
Price Per Sq FT Rank
11% lower than average

Compared to other properties in SW7 3AG , this flat's estimated value ranks 2nd out of 22. Based on price per square foot, it ranks 1st out of 10 properties. This suggests a relatively high price per square foot, which may reflect quality, location, or recent upgrades. In terms of size, this home ranks 2nd out of 10 properties in its postcode area.

Sale History

Today
£1,929,849
streetscan.co.uk estimate
-6 %
12 Sep 2017
£2,045,000
Leasehold
+41 %
24 Aug 2006
£1,450,000
Leasehold

Area Insights

Similar Properties Sold Nearby

rooms: 4
size: 1561 sq ft
sale price: £1,380,000
sale date: 22 Aug 2008
rooms: 4
size: 1206 sq ft
sale price: £2,025,000
sale date: 21 Nov 2024
rooms: 3
size: 1292 sq ft
sale price: £1,250,000
sale date: 2 Aug 2024
rooms: 3
size: 1294 sq ft
sale price: £2,450,000
sale date: 6 Sep 2022
rooms: 3
size: 1227 sq ft
sale price: £2,000,000
sale date: 6 May 2022

Data Sources

The property at Flat 1, 28 Onslow Gardens, London, SW7 3AG appears two times in the Land Registry records, with the latest transaction recorded on 12 Sep 2017. It also has four Energy Performance Certificates (EPC) entries, the earliest dating back to 4 Mar 2025. We use this data, to estimate the property's characteristics and current market value.

This website uses public sector information from:

These datasets are licensed under the Open Government Licence v3.0.
This website is not affiliated with or endorsed by HM Land Registry or DLUHC.


Disclaimer: StreetScan.co.uk makes all reasonable efforts to ensure the information provided on this website is current and accurate; however, no warranties or representations are made as to its completeness or accuracy. StreetScan.co.uk expressly disclaims any and all liability for any loss, damage, or expense arising directly or indirectly from the use of, or reliance upon, such information.