Flat 3, 11 Belsize Park, London, NW3 4ES
About Flat 3
Flat 3 is a two-bedroom semi-detached house in London (NW3 4ES). It has a recorded floor area of 110 m² (around 1184 sq ft), construction records dating it to before 1900 and council tax band G. Tenure is freehold. At 110 m² this is the largest unit on EPC record across the building (38–110 m²). The building's EPC ratings span E to C across 6 units on file. Other recorded features include a balcony. Period features are noted in the property record. The latest certificate (October 2016) shows a D (score 57), a step below the typical UK home. The recommended improvements would push it to C (score 76).
At 110 m² the property is well over the postcode median (64 m² across 35 EPCs), placing it in the larger end of the local stock. A recent sale: £1,350,000 in March 2025. Across 2007–2025, sale prices on this property compounded at 2.5% per year. Today's modelled estimate of £1,587,000 is 17.6% above the 2025 sale price. On a £-per-square-foot basis, the last sale (£1,140/sq ft) was about 106.3% above the typical sold price in the postcode.
Know exactly what you're buying at Flat 3
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
What this property has
Inside
- Bedrooms2
- Bathrooms1
- Dining roomYes
Outside
- Communal gardenYes
- BalconyYes
Building
- TenureFreehold
- Period featuresYes
Energy performance
EPC Rating
Planning history
Flat 3 has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
We flagged 1 thing worth checking at Flat 3
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
Flat 3 valuation sits well clear of the typical sold price in this postcode.
£1,587,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.5% per year over 18 years.
£1,350,000
Growth on file: 2.5% per year over 18 years.
Sales timeline
20 March 2025Most recent
£1,350,000
-8.5%over 8 years15 March 2017
£1,475,000
+68.6%over 9 years30 July 2007
£875,000
Median price across the last 5 sales in NW3 4ES: £745,000 (2023–2023).
Nearby sales in NW3 4ES
Claridge 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
£800,000Flat 5, 11 Belsize Park, London, NW3 4ES
Sold Jan 2023
£675,000
Everything we know about Flat 3, 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
Years Held for Flat 3 lags the street by a wide margin.
Price per m²
£12,273
Street avg £8,108
Floor Area
110 m²
Street avg 83 m²
Habitable Rooms
3 rooms
Street avg 3 rooms
CO₂ Emissions
5.4 t/year
Street avg 3.4 t/year
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15a, Flat B, Eton Road
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12a, Flat 2, Belsize Park
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12a, Flat 1, Belsize Park
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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