What percentage of homes in Vale of Glamorgan are below EPC band C?

46.6% of rated homes in Vale of Glamorgan are below EPC band C (as of 2026-Q2) — 13,955 of 29,976 rated dwellings. Source: The Home Index, from EPC Open Data under the Open Government Licence.

How many homes in Vale of Glamorgan need upgrading to reach EPC band C?

13,955 rated dwellings in Vale of Glamorgan sit below EPC band C and would need improvement to reach the band-C standard.

How does Vale of Glamorgan rank for the EPC band C retrofit gap?

Vale of Glamorgan ranks #391 for the widest retrofit gap among constituency areas in England and Wales.

Constituency diagnosis

Vale of Glamorgan

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

W07000110vintage 2026-Q2#391 by retrofit gap

Constituency figures use the 2024 Westminster; comparisons are only valid within one boundary vintage.

In Vale of Glamorgan, 13,955 rated homes sit below EPC band C. That puts the area at #391 for the widest gap among constituency areas in England & Wales.

Direction of travel

On current pace, reaches band C by 2049

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

Retrofit gap

46.6%

of 29,976 rated domestic dwellings are below band C.

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

Homes below band C

13,955

League rank

#391

1 = widest gap.

Cost to reach band C

£118.7m(modelled estimate of the cost to reach band C)

Position and trajectory

Is the gap closing?

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

Fig.1Retrofit gap over time

Stock · year-end

Share of Vale of Glamorgan's rated dwellings below band C at each year-end, ending at its headline 46.6%. Tracks every home by its latest certificate. EPC register.

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

£2.5bn

estimate for below-C stock; not a valuation.

Median sale price

£263k

typical matched sale here.

Matched sale £/m²

£2,813/m²

median, from matched sales.

Spread vs cost

4.24×

observed C+ price/m² spread ÷ modelled cost-to-C.

46.8% coverageMatched-sale estimate from recent HM Land Registry sales. Not a valuation. Methodology.

Matched sale £/m²

£2,813/m²

Matched-sale exposure

£2.5bnmatched-sale estimate of below-C rated stock value; not a valuation

C+ price/m² spread

+13.7%

Below-C transaction rate

1.47×

Private rented sector

The rented-stock cut

61.3% (based on 82.8% tenure coverage)

Make it specific

Area averages cannot tell you what one home needs.

Check a real address in Vale of Glamorgan 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 Vale of Glamorgan's citable figure — copy the line below or embed the live widget, free to use with attribution.

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Citation

The Home Index (2026-Q2): Vale of Glamorgan has a retrofit gap of 46.6% — the share of rated homes below EPC band C. Source: EPC Open Data (Open Government Licence).

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