Flat 6, 81 Onslow Square, London, SW7 3LT is a leasehold flat built between 1900-1929. The property offers approximately 1,356 square feet of living space and is situated on the 3rd floor. In this location, apartments of similar size usually have four bedrooms.

The estimated current market value of the property is £3,377,710 , which equates to approximately £2,490 per square foot. It was last sold on 15 Dec 2014 for £3,950,000. Since then, the value has decreased by £572,290, representing a 14.5% decrease, or approximately 1.3% per year.

The current estimated value of £3,377,710 is:

  • 59.2% higher than the average property price on Onslow Square
  • 13.6% higher than the average in the SW7 3LT postcode area
  • and 317.3% higher than the average price for London as a whole

At the most recent EPC inspection on 11 October 2022, the property was recorded as owner-occupied.

View sold house prices in SW7 3LT

Building approximate location

About Property

Type
Flat
Built
1900-1929
Interior Size
1356 sq ft
Tenure
Leasehold
Floor level
3rd floor
Price (estimate)
£3,377,710
Price Per sq ft (estimate)
£2,490
Bedroom Count (estimate)
4 bedrooms

EPC Summary

Flat 6, 81 Onslow Square, London, Kensington And Chelsea, Greater London, SW7 3LT has an Energy Performance Certificate (EPC) rating of C, based on the latest assessment carried out on 11 Oct 2022.

This property is heated by a shared community system (community scheme). Community heating means the heat is supplied from a central source serving multiple homes. A community heating scheme is used to provide hot water. The windows are single glazed.

The previous EPC assessment was conducted on 16 Jun 2010, when the property was rated D. Since then, the rating has improved to C, with the energy efficiency score increasing by 16.9%.

Since the previous assessment, several changes were observed:

  • The hot water system changed from from main system to community scheme, with no change in energy efficiency (good).
  • The lighting was updated from no low energy lighting to low energy lighting in all fixed outlets, with efficiency improving from very poor to very good.
Heating Type
Community scheme
Good
Hot Water
Community scheme
Good
Walls
Solid brick, as built, no insulation (assumed)
Very Poor
Windows
Single glazed
Very Poor
Lighting
Low energy lighting in all fixed outlets
Very Good

Compared to SW7 3LT

4 th / 16
Price Rank
14% higher than average
6 th / 12
Size Rank
7% smaller than average
1 st / 12
Price Per Sq FT Rank
23% higher than average

Sale History

Today
£3,377,710
streetscan.co.uk estimate
-14 %
15 Dec 2014
£3,950,000
Leasehold
+409.7 %
20 Jun 1997
£775,000
Leasehold

Flood Risk for this Property

Flood risk from rivers and the sea
Very low flood risk
Flood risk from surface water
Low flood risk
Surface water flood hazard
Low

* Results are based on Environment Agency flood risk mapping for the property UPRN where available. They are indicative and should not be treated as a site-specific flood survey.

Flood risk from rivers and the sea

This property has very low flood risk from rivers and the sea.

River and sea flooding includes flooding caused by overflowing rivers, estuaries, tidal waters and coastal surges.

Flood risk from surface water

This property has low surface water flood risk.

Surface water flooding can happen when heavy rainfall overwhelms drains, roads, gardens or other hard surfaces.

Flood depth indicators

Rivers and Sea
  • 0.2m depth No mapped risk
  • 0.3m depth No mapped risk
  • 0.6m depth No mapped risk
  • 0.9m depth No mapped risk
  • 1.2m depth No mapped risk
Surface Water
  • 0.2m depth Low
  • 0.3m depth Low
  • 0.6m depth No mapped risk
  • 0.9m depth No mapped risk
  • 1.2m depth No mapped risk

Area Insights

Similar Properties Sold Nearby

rooms: 4
size: 1539 sq ft
sale price: £2,500,000
sale date: 15 Aug 2025
rooms: 4
size: 1227 sq ft
sale price: £2,600,000
sale date: 3 Oct 2023
rooms: 4
size: 1319 sq ft
sale price: £2,250,000
sale date: 7 Jan 2011
rooms: 4
size: 1378 sq ft
sale price: £1,100,000
sale date: 29 Apr 2004
rooms: 4
size: 1163 sq ft
sale price: £2,750,000
sale date: 20 Nov 2025

Data Sources

The property at Flat 6, 81 Onslow Square, London, SW7 3LT appears two times in HM Land Registry records, with the latest transaction recorded on 15 Dec 2014. It also has two Energy Performance Certificate (EPC) records, the earliest dating back to 11 Oct 2022. We use this information to estimate the property's characteristics, flood risk profile and current market value.

This website uses public sector information from:

These datasets are licensed under the Open Government Licence v3.0 .

StreetScan.co.uk is not affiliated with, endorsed by, or associated with HM Land Registry, DESNZ, MHCLG, Defra or the Environment Agency.


Disclaimer: StreetScan.co.uk makes all reasonable efforts to ensure that the information provided on this website is current and accurate. However, no warranties or representations are made regarding its completeness, accuracy, suitability or reliability. Property values, flood risk assessments and other derived information are estimates based on publicly available datasets and should not be relied upon as professional, legal, surveying, environmental, financial or insurance advice. StreetScan.co.uk expressly disclaims all liability for any loss, damage, cost or expense arising directly or indirectly from the use of, or reliance upon, information provided on this website.