23 Christopher Close, Sidcup DA15 8PU

Not Recorded maisonette · Built 1967-1975 · 75 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

Get upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Cavity wall insulation(optional, beyond C)£900 – £1,500£8015.0 yrs+2.4 pts
Loft insulation(optional, beyond C)£900 – £1,200£5120.6 yrs+1.6 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

£795
per year at grade C
£664
per year at grade C

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

Sold prices

8 May 2009£145,000
15 November 1995£49,000

Estimated today: £268,550 HPI-indexed estimate, not a valuation

Christopher Close: 51 sales since 1995 · £315,802 average over 10 years

Schools nearby

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

SchoolPhaseDistanceProgress
Our Lady of the Rosary Catholic Primary SchoolPrimary0.3 mi
Days Lane Primary SchoolPrimary0.3 mi
Alderwood Primary SchoolPrimary0.5 mi
Harris Academy FalconwoodSecondary0.6 miProgress 8 -0.02 · average (2023/24)
Bexley Grammar SchoolSecondary0.7 miProgress 8 +0.49 · above average (2023/24)
Blackfen School for GirlsSecondary0.7 miProgress 8 -0.14 · 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.

5.5
crimes a month
33
in the last 12 months
Anti-social behaviour
most common · 33% of the total

Police.uk street-level data for LSOA E01000341, to 2026-06. An LSOA holds about 1,500 people, so this covers far more than one street.

Christopher Close

How this home sits against its street.

27
graded homes
67.7
average score
D
most common grade
+8.3
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.