Flat C, 121 Clapham Common North Side, London SW4 9SP

Mid-Terrace flat · Built before 1900 · 51 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

Get upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Floor insulation(optional, beyond C)£800 – £1,200£1089.2 yrs+3.7 pts
Solid wall insulation(optional, beyond C)£4,000 – £14,000£11750+ yrs+4.0 pts
Double glazing(optional, beyond C)£3,300 – £6,500£3950+ yrs+1.3 pts

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

£794
per year at grade C
£529
per year at grade C

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2024, states £852 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

4 June 2021£500,000
21 September 2017£501,395
8 May 2009£276,500
23 December 2005£238,500
24 October 2000£175,000
16 July 1999£135,000
28 April 1995£72,500

Estimated today: £494,618 HPI-indexed estimate, not a valuation

Clapham Common North Side: 484 sales since 1995 · £1,212,670 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Belleville Primary SchoolPrimary0.3 mi
Honeywell Junior SchoolPrimary0.5 mi
Honeywell Infant SchoolPrimary0.5 mi
Ark Bolingbroke AcademySecondary0.4 miProgress 8 +1.04 · well above average (2023/24)
Harris Academy BatterseaSecondary0.8 miProgress 8 +0.32 · above average (2023/24)
The Elms AcademySecondary0.9 miProgress 8 +0.91 · well above 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.

37.1
crimes a month
408
in the last 12 months
Violence and sexual offences
most common · 22% of the total

Police.uk street-level data for LSOA E01004588, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Clapham Common North Side

How this home sits against its street.

218
graded homes
64.4
average score
D
most common grade
+4.6
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.