4 Mansion Gardens, London NW3 7NG

Detached house · Built 1983-1990 · 290 m² · Unknown · Boiler and radiators, mains gas, Boiler and radiators, mains gas

Upgrade Plan

DC for £15,325 · £15,325 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Loft insulation£100 – £350£992.3 yrs+1.7 pts
Floor insulation£800 – £1,200£2074.8 yrs+3.6 pts
Band A condensing boiler£2,200 – £3,000£12720.5 yrs+2.2 pts
Solar photovoltaic panels£9,000 – £14,000£19150+ yrs+3.4 pts · reaches C

Grants verified 20 August 2026. Costs are the register’s indicative ranges. Savings are restated at the fuel prices assumed in July 2026. Points per measure are estimated from 19.9 million certificates and rescaled to this home’s own certificate delta; the total is the register’s figure.

Running costs

£3,528
per year at grade D
£2,904
per year at grade C

The full plan saves £624 a year — a 4.1% annual return on £15,325.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2012, states £2,085 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

12 August 2013£3,500,000
31 August 2006£2,694,000
13 September 2002£1,835,000

Estimated today: £4,769,283 HPI-indexed estimate, not a valuation

Mansion Gardens: 8 sales since 1995

Schools nearby

The schools’ own performance — Progress 8 shows value added, not just raw results.

SchoolPhaseDistanceProgress
Christ Church Primary School, HampsteadPrimary0.4 mi
New End Primary SchoolPrimary0.4 mi
Hampstead Parochial Church of England Primary SchoolPrimary0.4 mi
Hampstead SchoolSecondary1.0 miProgress 8 -0.46 · below average (2023/24)
The Henrietta Barnett SchoolSecondary1.4 miProgress 8 +1.09 · well above average (2023/24)
The UCL AcademySecondary1.5 miProgress 8 -0.16 · average (2023/24)

Schools from the DfE register, performance from the KS4 performance tables. Progress 8 is a GCSE measure, so primaries have none. Distance is straight-line from the postcode, not a catchment: admission is decided by the school, not by us.

Area context

Police-recorded crime for the wider neighbourhood, not this address. We grade homes, never neighbourhoods — so this is reported as a count, not a rating.

6.7
crimes a month
67
in the last 12 months
Violence and sexual offences
most common · 27% of the total

Police.uk street-level data for LSOA E01000885, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.