Flat 1, 40 Belsize Square, London, NW3 4HL is a leasehold flat built before 1900. The property offers approximately 1,281 square feet of living space. In this location, apartments of similar size usually have four bedrooms.
The estimated current market value of the property is £1,969,238 , which equates to approximately £1,537 per square foot. It was last sold on 8 Aug 1997 for £381,000. Since then, the value has increased by £1,588,238, representing a 416.9% increase, or approximately 14.4% per year.
The current estimated value of £1,969,238 is:
This property has had 2 EPC inspections with recorded tenure information. It was recorded once as rented and once as owner-occupied, indicating a change in how it was used over time.
At the most recent EPC inspection on 9 December 2025, the property was recorded as rented.
Flat 1, 40 Belsize Square, London, Camden, Greater London, NW3 4HL has an Energy Performance Certificate (EPC) rating of D, based on the latest assessment carried out on 9 Dec 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 are single glazed.
The previous EPC assessment was conducted on 28 Sep 2015. The rating of D remains the same, but the energy efficiency score improved by 7.9%.
Since the previous assessment, several changes were observed:
* 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.
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.
This property has medium surface water flood risk.
Surface water flooding can happen when heavy rainfall overwhelms drains, roads, gardens or other hard surfaces.
The property at Flat 1, 40 Belsize Square, London, NW3 4HL appears two times in HM Land Registry records, with the latest transaction recorded on 8 Aug 1997. It also has two Energy Performance Certificate (EPC) records, the earliest dating back to 9 Dec 2025. We use this information to estimate the property's characteristics, flood risk profile and current market value.
This website uses public sector information from:
HM Land Registry Price Paid Data
Energy Performance of Buildings Data published by the Department for Energy Security and Net Zero (DESNZ) and the Ministry of Housing, Communities and Local Government (MHCLG).
Flood risk data supplied by the Environment Agency through the Department for Environment, Food & Rural Affairs (Defra) Data Services Platform.
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.