Flat 5, 11 Belsize Square, London, NW3 4HT is a leasehold flat built before 1900. The property offers approximately 409 square feet of living space and is situated on the 3rd floor of a 1-storey building. In this location, apartments of similar size usually have one bedroom.

The estimated current market value of the property is £538,956 , which equates to approximately £1,318 per square foot. It was last sold on 22 Nov 1996 for £97,000. Since then, the value has increased by £441,956, representing a 455.6% increase, or approximately 15.4% per year.

The current estimated value of £538,956 is:

  • 52.6% lower than the average property price on Belsize Square
  • 61.7% lower than the average in the NW3 4HT postcode area
  • and 33.4% lower than the average price for London as a whole

At the most recent EPC inspection on 9 March 2026, the property was recorded as rented.

View sold house prices in NW3 4HT

Building approximate location

About Property

Type
Flat
Built
before 1900
Interior Size
409 sq ft
Tenure
Leasehold
Floor level
3rd floor of 1
Price (estimate)
£538,956
Price Per sq ft (estimate)
£1,318
Bedroom Count (estimate)
1 bedroom

EPC Summary

Flat 5, 11 Belsize Square, London, Camden, Greater London, NW3 4HT has an Energy Performance Certificate (EPC) rating of D, based on the latest assessment carried out on 9 Mar 2026.

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 are single glazed.

The previous EPC assessment was conducted on 17 Apr 2018, when the property was rated C. The current rating of D reflects a decline in energy efficiency of 20.8%.

Since the previous assessment, several changes were observed:

  • The roof construction or insulation changed from pitched, 200 mm loft insulation to pitched, no insulation, changing energy efficiency from good to very poor.
  • The wall construction or insulation changed from solid brick, with internal insulation to solid brick, as built, no insulation (assumed), changing energy efficiency from good to poor.
  • The windows were upgraded from fully double glazed to single glazed.
  • The lighting was updated from low energy lighting in all fixed outlets to good lighting efficiency, with efficiency changing from very good to good.
Heating Type
Boiler and radiators, mains gas
Good
Hot Water
From main system
Good
Roof
Pitched, no insulation
Very Poor
Walls
Solid brick, as built, no insulation (assumed)
Poor
Windows
Single glazed
Very Poor
Lighting
Good lighting efficiency
Good

Compared to NW3 4HT

55 th / 61
Price Rank
62% lower than average
41 st / 41
Size Rank
62% smaller than average
11 th / 41
Price Per Sq FT Rank
2% higher than average

Sale History

Today
£538,956
streetscan.co.uk estimate
+456 %
22 Nov 1996
£97,000
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: 2
size: 463 sq ft
sale price: £602,500
sale date: 1 Mar 2016
rooms: 2
size: 420 sq ft
sale price: £424,500
sale date: 18 Oct 2010
rooms: 2
size: 441 sq ft
sale price: £225,000
sale date: 25 Nov 2005
rooms: 2
size: 463 sq ft
sale price: £238,000
sale date: 29 May 2003
rooms: 2
size: 452 sq ft
sale price: £225,000
sale date: 19 Apr 2001

Data Sources

The property at Flat 5, 11 Belsize Square, London, NW3 4HT appears once in HM Land Registry records, with the transaction recorded on 22 Nov 1996. It also has two Energy Performance Certificate (EPC) records, the earliest dating back to 9 Mar 2026. 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.