Flat 4, 5 Onslow Square, London, SW7 3NJ is a leasehold flat built before 1900. The property offers approximately 1,087 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 £2,540,021 , which equates to approximately £2,336 per square foot. It was last sold on 18 Dec 2015 for £2,850,000. Since then, the value has decreased by £309,979, representing a 10.9% decrease, or approximately 1.0% per year.

The current estimated value of £2,540,021 is:

  • 23.0% lower than the average in the SW7 3NJ postcode area
  • and 213.8% higher than the average price for London as a whole

Based on EPC inspection history, this property has been mostly owner-occupied (3 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 16 August 2012, the property was recorded as owner-occupied.

View sold house prices in SW7 3NJ

Building approximate location

About Property

Type
Flat
Built
before 1900
Interior Size
1087 sq ft
Tenure
Leasehold
Floor level
3rd floor
Price (estimate)
£2,540,021
Price Per sq ft (estimate)
£2,336
Bedroom Count (estimate)
4 bedrooms

EPC Summary

Flat 4, 5 Onslow Square, London, Kensington And Chelsea, Greater London Authority, SW7 3NJ has an Energy Performance Certificate (EPC) rating of D, based on the latest assessment carried out on 16 Aug 2012.

This property uses electric underfloor heating as its main heating source. A community heating scheme is used to provide hot water. The windows are single glazed.

The previous EPC assessment was conducted on 8 Aug 2012. The rating of D remains the same, but the energy efficiency score improved by 7.3%.

Since the previous assessment, several changes were observed:

  • The main heating energy efficiency changing from average to poor, while the heating system type remained the same (electric underfloor heating).
  • The hot water system was changed from electric immersion, off-peak to community scheme, with its energy efficiency improving from very poor to good.
  • The lighting was updated from low energy lighting in all fixed outlets to no low energy lighting, with efficiency changing from very good to very poor.
Heating Type
Electric underfloor heating
Poor
Hot Water
Community scheme
Good
Walls
Solid brick, as built, no insulation (assumed)
Very Poor
Windows
Single glazed
Very Poor
Lighting
No low energy lighting
Very Poor

Sale History

Today
£2,540,021
streetscan.co.uk estimate
-11 %
18 Dec 2015
£2,850,000
Leasehold
+21.5 %
20 Dec 2012
£2,345,000
Leasehold
+194.7 %
16 Feb 2012
£795,700
Leasehold
-6.4 %
11 Jul 2011
£850,000
Leasehold

Flood Risk for this Property

Flood risk from rivers and the sea
Very low flood risk
Flood risk from surface water
Very low flood risk
Surface water flood hazard
No mapped risk

* 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 very 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 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

Area Insights

Similar Properties Sold Nearby

rooms: 4
size: 1163 sq ft
sale price: £2,750,000
sale date: 20 Nov 2025
rooms: 4
size: 1249 sq ft
sale price: £560,000
sale date: 11 Oct 2024
rooms: 3
size: 1012 sq ft
sale price: £1,600,000
sale date: 28 Jul 2023
rooms: 4
size: 1249 sq ft
sale price: £3,600,000
sale date: 5 Aug 2022
rooms: 3
size: 1195 sq ft
sale price: £2,300,000
sale date: 22 Mar 2021

Data Sources

The property at Flat 4, 5 Onslow Square, London, SW7 3NJ appears four times in HM Land Registry records, with the latest transaction recorded on 18 Dec 2015. It also has three Energy Performance Certificate (EPC) records, the earliest dating back to 16 Aug 2012. 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.