11 Hornbeam Close, St. Mellons, Cardiff CF3 0JA

Semi-Detached house · Built 1976-1982 · 54 m² · Owner-Occupied · Boiler and radiators, mains gas

Upgrade Plan

D → B for £17,700 · £8,850 a gradeGet upgrade quotes
MeasureGrantNet costSaving / yrPaybackGrade effect
Cavity wall insulation—£900 – £1,500£4625.9 yrs+5.0 pts · reaches C
Floor insulation—£5,000 – £10,000£6250+ yrs+6.7 pts
Solar photovoltaic panels—£8,000 – £10,000£5750+ yrs+6.2 pts · reaches B

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

£967
per year at grade D
£801
per year at grade B

The full plan saves £166 a year — a 0.9% annual return on £17,700.

Restated at the fuel prices assumed in July 2026. This certificate, assessed in 2026, states £891 a year at the prices assumed then. Modelled costs, not a bill.

Sold prices

16 June 2017£140,000
2 December 2013£115,000
30 August 2000£51,000
9 June 1997£50,952

Estimated today: £202,921 HPI-indexed estimate, not a valuation

Hornbeam Close: 34 sales since 1995 · £196,000 average over 10 years

Schools nearby

The DfE register covers England. Welsh schools are held in a separate Welsh Government register, which we have not ingested yet.

Hornbeam Close

How this home sits against its street.

12
graded homes
64.6
average score
D
most common grade
+2.4
this home vs street
Energy data © Crown copyright, EPB Register© HM Land Registry, OGL v3We grade homes, never neighbourhoods.