21 Chalsey Road, London SE4 1YN

Not Recorded flat · Built 1900-1929 · 56 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

DC for £16,950 · £16,950 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Draughtproofing£150 – £250£692.9 yrs+2.6 pts
Floor insulation£5,000 – £10,000£8250+ yrs+3.1 pts
Solid wall insulation£7,500 – £11,000£8950+ yrs+3.3 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

£936
per year at grade D
£695
per year at grade C

The full plan saves £241 a year — a 1.4% annual return on £16,950.

Energy costs as modelled on the certificate, not a bill.

Sold prices

25 October 2021£505,000
26 January 2015£365,000
2 December 2003£175,000
13 August 2001£112,500
11 August 2000£123,000
9 December 1996£51,500
13 September 1995£48,000

Estimated today: £520,051 HPI-indexed estimate, not a valuation

Chalsey Road: 104 sales since 1995 · £776,313 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Beecroft Garden PrimaryPrimary0.4 mi
Gordonbrock Primary SchoolPrimary0.4 mi
John Stainer Community Primary SchoolPrimary0.5 mi
Prendergast SchoolSecondary0.2 miAttainment 8 64.0 · no Progress 8 published
Haberdashers' Hatcham CollegeSecondary0.7 miProgress 8 +0.08 · average (2023/24)
Addey and Stanhope SchoolSecondary1.0 miProgress 8 -0.38 · below 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.

12.8
crimes a month
141
in the last 12 months
Anti-social behaviour
most common · 30% of the total

Police.uk street-level data for LSOA E01003272, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Chalsey Road

How this home sits against its street.

59
graded homes
61.9
average score
D
most common grade
+1.1
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.