21 Cambridge Street, Tunbridge Wells TN2 4SJ

Mid-Terrace house · Built before 1900 · 177 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

DB for £20,990 · £10,495 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Draughtproofing£80 – £120£1150.9 yrs+2.8 pts · reaches C
Hot water cylinder insulation£200 – £400£1162.6 yrs+2.8 pts
Low energy lighting£90£615.1 yrs+0.1 pts
Solar water heating£4,000 – £6,000£10547.4 yrs+2.5 pts
Solar photovoltaic panels£5,000 – £8,000£12650+ yrs+3.0 pts
Solid wall insulation£4,000 – £14,000£14750+ yrs+3.5 pts · reaches B
Double glazing(optional, beyond B)£3,300 – £6,500£4950+ yrs+1.2 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

£2,063
per year at grade D
£1,399
per year at grade B

The full plan saves £615 a year — a 2.9% annual return on £20,990.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2017, states £1,363 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

2 February 2024£1,065,000
7 August 2018£962,500
12 November 2010£390,000

Estimated today: £1,071,442 HPI-indexed estimate, not a valuation

Schools nearby

No school in the register within reach of this postcode.

Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.