Northcote Mansions, 122 Heath Street, Camden, London, NW3 1DT
About Northcote Mansions
Northcote Mansions is a four-bedroom semi-detached house in Camden, London, London (NW3 1DT). It has a recorded floor area of 130 m² (around 1399 sq ft) and construction records dating it to 1900-1929. At 130 m² this is the smallest unit on EPC record across Northcote Mansions (130–139 m²). The building's EPC ratings span D to C, with this unit at the top. Period features are noted in the property record. The latest certificate (January 2023) shows a C (score 69), just inside the C band. When first surveyed in November 2008 the rating was E, the property has climbed 2 bands since. Between certificates, wall efficiency went from Very Poor to Poor, window efficiency went from Very Poor to Poor and hot-water efficiency went from Average to Good. The recommended improvements would push it to B (score 82).
Held since November 2005 — that's 21 years off the open market, well above the local norm. Today's modelled estimate of £1,212,000 sits 681.9% above the 2005 sale of £155,000. On a £-per-square-foot basis, the last sale (£111/sq ft) was about 83.9% below the postcode norm. Its energy rating outperforms most of the postcode (better than 75% of similar EPCs). 6 planning records sit against the property, 0 approved, 4 refused.
Know exactly what you're buying at Northcote Mansions
Before you offer, see what the listing won't tell you, the true value, the red flags and the full history.
Valuation
against the asking price
Risks
planning & flood
Sold prices
similar homes nearby
Trends
the local market
What this property has
Inside
- Bedrooms4
Building
- Period featuresYes
Energy performance
EPC Rating
Property Improvements
Changes detected from historical EPC data
Heating controls upgraded for better temperature management
Hot water system upgraded
Single glazing replaced with double or better glazing
Window efficiency improved
Wall insulation improved
Heating controls changed
Hot water system changed
Heating controls upgraded for better temperature management
Hot water efficiency improved
Hot water system upgraded
Single glazing replaced with double or better glazing
Wall insulation improved
More low energy lighting installed
Planning history
Council records show a subdivision application — the property's legal arrangement has been altered.
- Mar 2010FullIn report
Change of use of existing self-contained residential flat (Class C3) into two self-contained residential flats (Class C3) at ground floor level.
- Reference
- 2010/1547/P
- Apr 2005SubdivisionFullIn report
The change of use of the existing self-contained flat on the ground floor and vacant basement space to 3x self-contained flats, with associated minor alterations to the front and rear elevations.
Change of Use- Reference
- 2005/1742/P
What's in Northcote Mansions, 122 Heath Street, Camden, London, NW3 1DT's planning history?
4 more on this property, plus refusals, disputes and full decisions nearby, in the report.
Sales history & valuation
Northcote Mansions's modelled value sits at over four times its earliest registered sale price (2005).
£1,212,000
Modelled from EPC, postcode comparables.
£155,000
Recorded with HM Land Registry.
Sales timeline
16 November 2005Most recent
£155,000
Median price across the last 5 sales in NW3 1DT: £1,250,000 (2024–2011).
Nearby sales in NW3 1DT
Northcote Mansions, Flat 3, 122 Heath Street, London, NW3 1DT
Sold Aug 2024
£1,250,000Northcote Mansions, Flat 4, 122 Heath Street, London, NW3 1DT
Sold Jun 2021
£1,300,000Northcote Mansions, Flat 2, 122 Heath Street, London, NW3 1DT
Sold Apr 2015
£1,435,000Northcote Mansions, Flat 1, 122 Heath Street, London, NW3 1DT
Sold Jul 2011
£960,000Northcote Mansions, Basement Flat, 122 Heath Street, London, NW3 1DT
Sold Feb 2009
£392,000
Everything we know about Northcote Mansions, in one report
What it's really worth, what could be wrong, and the planning, sales and area data in full.
- Am I paying too much?
- Is something wrong with it?
- Is the agent's story true?
- Will it hold its value?

Versus other Heath Street homes
On price per m², Northcote Mansions runs well behind the street norm.
Price per m²
£1,192
Street avg £9,240
Floor Area
130 m²
Street avg 134 m²
Habitable Rooms
5 rooms
Street avg 5 rooms
CO₂ Emissions
4.2 t/year
Street avg 5.2 t/year
Similar properties nearby
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NW3 1HN
1 Lutton Terrace, Camden
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1 Cannon Lane, Camden
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1 Gayton Road, Camden
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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
Whitestone Pond / Jack Straw's Castle — bus stop.
Closest school
0.1 km
Christ Church Primary School, Hampstead. 50 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
51.5dB

Night-time· 23:00 – 07:00
41.6dB