15b, Belsize Park, London, NW3 4ES
About 15b
15b is a semi-detached house in London (NW3 4ES). It has a recorded floor area of 38 m² (around 408 sq ft), construction records dating it to 1930-1949 and council tax band B. The latest certificate (November 2009) shows a C (score 69), just inside the C band. The latest certificate is from November 2009, so improvements made since then won't be reflected.
Untraded for 26 years, with the last transfer in August 2000. Only one transfer is on record with HM Land Registry, suggesting it has stayed in the same hands for a long time. Today's modelled estimate of £515,000 sits 175% above the 2000 sale of £187,275. On a £-per-square-foot basis, the last sale (£459/sq ft) was about 17.8% below the postcode norm. At 38 m² it sits well below the postcode median (65 m² across 35 EPCs), making it one of the more compact homes locally.
Know exactly what you're buying at 15b
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Already flagged here
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
Energy performance
15b's EPC is over a decade old — improvements since won't be reflected.
EPC Expired
This certificate is over 10 years old and is no longer valid.Expired 23 Nov 2019
EPC Rating
Planning history
15b has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
We flagged 1 thing worth checking at 15b
Independent checks surfaced things a buyer would want to understand before offering. The report explains each one in full, with the underlying data and what to ask.
- Larger development activity nearby
30-day money-back guarantee
Sales history & valuation
£515,000
Modelled from EPC, postcode comparables.
£187,275
Recorded with HM Land Registry.
Sales timeline
20 August 2000Most recent
£187,275
Median price across the last 5 sales in NW3 4ES: £800,000 (2025–2023).
Nearby sales in NW3 4ES
Flat 3, 11 Belsize Park, London, NW3 4ES
Sold Mar 2025
£1,350,000Claridge House, Flat 4, 13 Belsize Park, London, NW3 4ES
Sold Oct 2023
£721,500Flat 4, 14 Belsize Park, London, NW3 4ES
Sold Jun 2023
£745,000Flat 4, 16 Belsize Park, London, NW3 4ES
Sold Jun 2023
£1,700,000Flat 1, 11 Belsize Park, London, NW3 4ES
Sold Apr 2023
£800,000
Everything we know about 15b, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
What we flagged
- Larger development activity nearby
Versus other Belsize Park homes
Floor Area for 15b lags the street by a wide margin.
Price per m²
£4,945
Street avg £8,427
Floor Area
38 m²
Street avg 85 m²
Habitable Rooms
2 rooms
Street avg 3 rooms
CO₂ Emissions
2.1 t/year
Street avg 3.5 t/year
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The neighbourhood at a glance
Rail-style transport is unusually close for this postcode.
Crime
6/mo
Rising year-on-year across the wider district.
Nearest stop
0.1 km
Belsize Square — bus stop.
Closest school
0.5 km
Holy Trinity CofE Primary School, NW3. 67 schools nearby.
Go deeper on the local area
The full report breaks down crime, transport links, schools and air quality in depth.
Road noise across the postcode
Daytime· 07:00 – 23:00
53.1dB
Night-time· 23:00 – 07:00
42.0dB