18a High Street, London SE20 7HG

Semi-Detached flat · Built 1900-1929 · 90 m² · Boiler and radiators, mains gas

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This certificate lists these measures but records the same score with and without them, so there is no saving or rating gain to attribute to any one of them. That usually means the assessment was incomplete — here the assessor recorded no heating system at all. The costs below are real; a fresh assessment would be the way to find the gain.

MeasureGrantNet costSaving / yrPaybackGrade effect
Double glazing£1,200 – £4,900typical
Solid wall insulation£9,000typical

Grants verified 20 August 2026. Costs are the register’s indicative ranges, except where marked typical, which this certificate did not price and which are taken instead from comparable homes of the same type.

Running costs

£1,384
per year at grade D

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2009, states £834 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

No sale recorded for this address since 1995.

High Street: 2,535 sales since 1995 · £402,690 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Harris Primary Academy Crystal PalacePrimaryunder 0.1 mi
St John's Church of England Primary SchoolPrimary0.2 mi
St Anthony's Catholic Primary SchoolPrimary0.5 mi
Harris Girls Academy BromleySecondary0.6 miProgress 8 +0.99 · well above average (2023/24)
Harris City Academy Crystal PalaceSecondary0.9 miProgress 8 +0.24 · above average (2023/24)
Forest Hill SchoolSecondary1.1 miProgress 8 +0.30 · 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.

19.5
crimes a month
214
in the last 12 months
Anti-social behaviour
most common · 29% of the total

Police.uk street-level data for LSOA E01000806, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

High Street

How this home sits against its street.

2,740
graded homes
72.5
average score
B
most common grade
-10.5
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.