What percentage of homes in Wiltshire are below EPC band C?

48.6% of rated homes in Wiltshire are below EPC band C (as of 2026-Q2) — 72,274 of 148,697 rated dwellings. Source: The Home Index, from EPC Open Data under the Open Government Licence.

How many homes in Wiltshire need upgrading to reach EPC band C?

72,274 rated dwellings in Wiltshire sit below EPC band C and would need improvement to reach the band-C standard.

How does Wiltshire rank for the EPC band C retrofit gap?

Wiltshire ranks #183 for the widest retrofit gap among local authority areas in England and Wales.

Local authority diagnosis

Wiltshire

Name: The Home Index — Wiltshire
Creator: The Home Index
License: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/

E06000054vintage 2026-Q2#183 by retrofit gap

In Wiltshire, 72,274 rated homes sit below EPC band C. That puts the area at #183 for the widest gap among local authority areas in England & Wales.

Direction of travel

On current pace, reaches band C by 2065

Projection from the 15-year rated-stock trend; not a forecast.

Retrofit gap

48.6%

of 148,697 rated domestic dwellings are below band C.

EPC Open Data · Open Government Licence · free to cite with attribution.

Homes below band C

72,274

League rank

#183

1 = widest gap.

Cost to reach band C

£655.0m(modelled estimate of the cost to reach band C)

Position and trajectory

Is the gap closing?

The latest position for Wiltshire, set against the recent direction of travel.

Fig.1Retrofit gap over time

Stock · year-end

Share of Wiltshire's rated dwellings below band C at each year-end, ending at its headline 48.6%. Tracks every home by its latest certificate. EPC register.

Cold Homes Index

51 / 100

#158 of 296 English local authorities (hardest to heat & fix). How it's built →

Land Registry × EPC — matched-sale signals

What is at stake in the local market

We match HM Land Registry sales to EPC certificates: price per m², below-C matched-sale exposure, the observed C-or-above price/m² spread, and transaction-rate signals. Modelled estimates, shown with match coverage; not valuations. Methodology

Matched-sale exposure

£17.8bn

estimate for below-C stock; not a valuation.

Median sale price

£340k

typical matched sale here.

Matched sale £/m²

£3,583/m²

median, from matched sales.

48.9% coverageMatched-sale estimate from recent HM Land Registry sales. Not a valuation. Methodology.

Matched sale £/m²

£3,583/m²

Matched-sale exposure

£17.8bnmatched-sale estimate of below-C rated stock value; not a valuation

C+ sale-price premium — size/type/location controlled

+1.5%

Homes rated C or better sell for ~+1.5% more per m², holding size, type and location constant (95% CI +1.5%–+1.5%).

Below-C transaction rate

1.23×

Local context

Fuel poverty & deprivation here

Current official local-authority data for gauging household hardship, grant-funding focus and where retrofit support is targeted.

Households in fuel poverty

9.6%

DESNZ sub-regional fuel poverty (LILEE), England.

Neighbourhoods in the most-deprived 10%

0.7%

share of LSOAs in the most-deprived national decile · English Indices of Deprivation 2025.

Retrofit funding available here

Retrofit grants concentrate in areas like this — schemes that may help fund work on below-C homes in Wiltshire:

Boiler Upgrade Scheme ↗ — £7,500 towards an air- or ground-source heat pump (or biomass).
Warm Homes: Local Grant ↗ — Insulation and low-carbon heating, delivered by your local authority.
Energy Company Obligation (ECO) / insulation schemes ↗ — Supplier-funded insulation and heating measures.

Schemes, eligibility rules and funding windows change. These are signposts, not an eligibility decision — confirm current rules via each scheme's official page. Eligibility usually depends on the household's income or benefits and the property.

Private rented sector

The rented-stock cut

54.7% (based on 83.8% tenure coverage)

Make it specific

Area averages cannot tell you what one home needs.

Check a real address in Wiltshire for its EPC, running costs, route to band C and available support. Landlords can then compare that home across a portfolio.

Check a home →Check a portfolio →

Prefer a general estimate? Model a home type in the cost calculator.

For local reporters: this is Wiltshire's citable figure — copy the line below or embed the live widget, free to use with attribution.

Cite this figure / embed

Citation

The Home Index (2026-Q2): Wiltshire has a retrofit gap of 48.6% — the share of rated homes below EPC band C. Source: EPC Open Data (Open Government Licence).

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