Flat 1 Heath House, Main Road, Sidcup DA14 6NJ

Detached maisonette · Built 1967-1975 · 62 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

D → C for £3,900 · £3,900 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Double glazing—£1,400 – £400£4818.6 yrs+1.6 pts
Floor insulation—£6,000 – £0£13422.4 yrs+4.5 pts · reaches C
Solid wall insulation(optional, beyond C)—£14,000 – £0£14548.4 yrs+4.9 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

£993
per year at grade D
£666
per year at grade C

The full plan saves £182 a year — a 4.7% annual return on £3,900.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2017, states £646 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

13 November 2020£221,000
16 July 2007£185,000
30 September 2004£148,000
23 April 2004£110,000

Estimated today: £244,716 HPI-indexed estimate, not a valuation

Main Road: 556 sales since 1995 · £333,278 average over 10 years

Schools nearby

No school in the register within reach of this postcode.

Main Road

How this home sits against its street.

388
graded homes
67.9
average score
C
most common grade
-2.9
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.