Flat 5, 6 Onslow Square, London, SW7 3NP is a leasehold flat built before 1900. The property offers approximately 1,141 square feet of living space and is situated on the 4th floor. In this location, apartments of similar size usually have four bedrooms.

The estimated current market value of the property is £2,097,661 , which equates to approximately £1,838 per square foot. It was last sold on 20 Nov 1996 for £425,000. Since then, the value has increased by £1,672,661, representing a 393.6% increase, or approximately 13.3% per year.

The current estimated value of £2,097,661 is:

  • 1.2% lower than the average property price on Onslow Square
  • 7.5% lower than the average in the SW7 3NP postcode area
  • and 159.1% higher than the average price for London as a whole

At the most recent EPC inspection on 5 February 2019, the property was recorded as owner-occupied.

View sold house prices in SW7 3NP

Building approximate location

About Property

Type
Flat
Built
before 1900
Interior Size
1141 sq ft
Tenure
Leasehold
Floor level
4th floor
Price (estimate)
£2,097,661
Price Per sq ft (estimate)
£1,838
Bedroom Count (estimate)
4 bedrooms

EPC Summary

Flat 5, 6 Onslow Square, London, Kensington And Chelsea, Greater London Authority, SW7 3NP has an Energy Performance Certificate (EPC) rating of C, based on the latest assessment carried out on 5 Feb 2019.

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. Hot water is provided by a community heating scheme, but the cylinder is not fitted with a thermostat. The windows are single glazed.

The previous EPC assessment was conducted on 17 Dec 2008, when the property was rated D. Since then, the rating has improved to C, with the energy efficiency score increasing by 10.4%.

Since the previous assessment, several changes were observed:

  • The hot water system changed from from main system to community scheme, no cylinder thermostat, 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, no cylinder thermostat
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 3NP

10 th / 23
Price Rank
8% lower than average
13 th / 17
Size Rank
9% smaller than average
10 th / 17
Price Per Sq FT Rank
2% higher than average

Sale History

Today
£2,097,661
streetscan.co.uk estimate
+394 %
20 Nov 1996
£425,000
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: 1184 sq ft
sale price: £2,200,000
sale date: 25 Jun 2025
rooms: 4
size: 1227 sq ft
sale price: £1,975,000
sale date: 24 Jul 2024
rooms: 4
size: 1302 sq ft
sale price: £3,200,000
sale date: 2 Nov 2015
rooms: 5
size: 1290 sq ft
sale price: £2,950,000
sale date: 11 Oct 2013
rooms: 4
size: 1270 sq ft
sale price: £440,000
sale date: 29 Aug 1995

Data Sources

The property at Flat 5, 6 Onslow Square, London, SW7 3NP appears once in HM Land Registry records, with the transaction recorded on 20 Nov 1996. It also has two Energy Performance Certificate (EPC) records, the earliest dating back to 5 Feb 2019. 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.