12a, Belsize Park, Camden, London, NW3 4ES
About 12a
12a is a semi-detached house in Camden, London, London (NW3 4ES). It has a recorded floor area of 111 m² (around 1195 sq ft) and construction records dating it to before 1900. At 111 m² this is the largest unit on EPC record across 12a (56–111 m²). The building's EPC ratings span D to C, with this unit at the top. On EPC score it ranks first in the building (71 versus a worst of 59). The latest certificate (February 2021) shows a C (score 71). The recommended improvements would push it to B (score 83).
Untraded for 20 years, with the last transfer in May 2006. At 111 m² the property is well over the postcode median (64 m² across 35 EPCs), placing it in the larger end of the local stock. Across 2001–2006, sale prices on this property compounded at 2.9% per year. Today's modelled estimate of £1,366,000 sits 84.6% above the 2006 sale of £740,000.
Know exactly what you're buying at 12a
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
EPC Rating
Planning history
12a has no planning applications on record.
Notable planning nearby
3applications of note in the surrounding area
We flagged 1 thing worth checking at 12a
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
12a saw 3 transfers in just over a decade — high turnover for the postcode.
£1,366,000
Modelled from EPC, postcode comparables and a sale-price growth of 2.9% per year over 5 years.
£740,000
Growth on file: 2.9% per year over 5 years.
Sales timeline
4 May 2006Most recent
£740,000
+10.8%over 1 year19 August 2004
£668,000
+2.8%over 2 years3 October 2001
£650,000
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 12a, 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
On habitable rooms, 12a stands well clear of the street.
Price per m²
£6,667
Street avg £8,352
Floor Area
111 m²
Street avg 83 m²
Habitable Rooms
4 rooms
Street avg 3 rooms
CO₂ Emissions
3.4 t/year
Street avg 3.4 t/year
Similar properties nearby
1 Lancaster Drive, Camden
NW3 4EY
1 Strathray Gardens, Camden
NW3 4PA
1 Steeles Mews North, Camden
NW3 4RJ
1 Avenue House, Belsize Park Gardens, Camden
NW3 4LA
1 Sussex House, Glenilla Road
NW3 4AR
1 Lambolle Road, Camden
NW3 4HS
1 Steeles Mews South, Camden
NW3 4SJ
1 Beaumont Walk, Camden
NW3 4SW
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