Insulation data · England & Wales

Home insulation data for your area

Covering 57 cities, towns, and counties across England and Wales.

Find your nearest area

England and Wales have a significant home insulation problem. Of the 14.1 million homes in our dataset, more than half have an EPC rating of D or below — meaning their heating bills are higher than they need to be, and they may qualify for funded improvements through ECO4 or the Warm Homes: Local Grant. The gap varies considerably by area: some cities sit well above the national average of 52%, others considerably below. Use this guide to explore insulation data for your area — including which measures are most commonly recommended, what savings are possible, and what grants are currently open. Enter your postcode above to go straight to your nearest area, or browse all locations below.

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Birmingham

57.3%

have EPC rating D or below

▲ 5.2% above England average

Most recommended: Internal or external wall insulation

Potential saving: up to £5/wk

Brighton

53.6%

have EPC rating D or below

▲ 1.5% above England average

Most recommended: Internal or external wall insulation

Potential saving: up to £5/wk

Bristol

51.2%

have EPC rating D or below

▼ 0.9% below England average

Most recommended: Internal or external wall insulation

Potential saving: up to £5/wk

Cambridgeshire

44.3%

have EPC rating D or below

▼ 7.8% below England average

Most recommended: Solar water heating

Potential saving: up to £4/wk

Cardiff

46.4%

have EPC rating D or below

▼ 5.7% below England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £4/wk

Carmarthenshire

64.1%

have EPC rating D or below

▲ 12.0% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £8/wk

Cheshire

50.8%

have EPC rating D or below

▼ 1.3% below England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk

Cornwall

58.6%

have EPC rating D or below

▲ 6.5% above England average

Most recommended: Solar water heating

Potential saving: up to £7/wk

County Durham

50.1%

have EPC rating D or below

▼ 2.0% below England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk

Coventry

51.8%

have EPC rating D or below

▼ 0.3% below England average

Most recommended: Internal or external wall insulation

Potential saving: up to £4/wk

Cumbria

51.8%

have EPC rating D or below

▼ 0.3% below England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £9/wk

Derby

54.3%

have EPC rating D or below

▲ 2.2% above England average

Most recommended: Internal or external wall insulation

Potential saving: up to £5/wk

Derbyshire

56.0%

have EPC rating D or below

▲ 3.9% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk

Devon

54.1%

have EPC rating D or below

▲ 2.0% above England average

Most recommended: Increase loft insulation to 270 mm

Potential saving: up to £6/wk

Dorset

52.2%

have EPC rating D or below

▲ 0.1% above England average

Most recommended: Cavity wall insulation

Potential saving: up to £5/wk

East Sussex

54.5%

have EPC rating D or below

▲ 2.4% above England average

Most recommended: Increase loft insulation to 270 mm

Potential saving: up to £5/wk

Essex

50.9%

have EPC rating D or below

▼ 1.2% below England average

Most recommended: Increase loft insulation to 270 mm

Potential saving: up to £5/wk

Gloucestershire

51.4%

have EPC rating D or below

▼ 0.7% below England average

Most recommended: Solar water heating

Potential saving: up to £5/wk

Gwynedd

72.2%

have EPC rating D or below

▲ 20.1% above England average

Most recommended: Internal or external wall insulation

Potential saving: up to £10/wk

Hampshire

46.2%

have EPC rating D or below

▼ 5.9% below England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £4/wk

Hertfordshire

46.7%

have EPC rating D or below

▼ 5.4% below England average

Most recommended: Increase loft insulation to 270 mm

Potential saving: up to £4/wk

Hull

51.9%

have EPC rating D or below

▼ 0.2% below England average

Most recommended: Internal or external wall insulation

Potential saving: up to £4/wk

Kent

50.0%

have EPC rating D or below

▼ 2.1% below England average

Most recommended: Increase loft insulation to 270 mm

Potential saving: up to £5/wk

Lancashire

55.8%

have EPC rating D or below

▲ 3.7% above England average

Most recommended: Cavity wall insulation

Potential saving: up to £5/wk

Leeds

53.1%

have EPC rating D or below

▲ 1.0% above England average

Most recommended: Floor insulation (suspended floor)

Potential saving: up to £5/wk

Leicester

57.2%

have EPC rating D or below

▲ 5.1% above England average

Most recommended: Internal or external wall insulation

Potential saving: up to £5/wk

Lincolnshire

53.6%

have EPC rating D or below

▲ 1.5% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk

Liverpool

45.1%

have EPC rating D or below

▼ 7.0% below England average

Most recommended: Internal or external wall insulation

Potential saving: up to £5/wk

London

46.8%

have EPC rating D or below

▼ 5.3% below England average

Most recommended: Internal or external wall insulation

Potential saving: up to £4/wk

Manchester

39.3%

have EPC rating D or below

▼ 12.8% below England average

Most recommended: Cavity wall insulation

Potential saving: up to £3/wk

Newcastle

45.6%

have EPC rating D or below

▼ 6.5% below England average

Most recommended: Internal or external wall insulation

Potential saving: up to £4/wk

Norfolk

55.2%

have EPC rating D or below

▲ 3.1% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk

North Yorkshire

48.7%

have EPC rating D or below

▼ 3.4% below England average

Most recommended: Floor insulation (suspended floor)

Potential saving: up to £9/wk

Northumberland

51.9%

have EPC rating D or below

▼ 0.2% below England average

Most recommended: Solar water heating

Potential saving: up to £6/wk

Nottingham

49.3%

have EPC rating D or below

▼ 2.8% below England average

Most recommended: Internal or external wall insulation

Potential saving: up to £4/wk

Nottinghamshire

53.6%

have EPC rating D or below

▲ 1.5% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk

Oxfordshire

43.9%

have EPC rating D or below

▼ 8.2% below England average

Most recommended: Solar water heating

Potential saving: up to £4/wk

Pembrokeshire

61.8%

have EPC rating D or below

▲ 9.7% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £7/wk

Plymouth

49.0%

have EPC rating D or below

▼ 3.1% below England average

Most recommended: Increase loft insulation to 270 mm

Potential saving: up to £4/wk

Portsmouth

52.9%

have EPC rating D or below

▲ 0.8% above England average

Most recommended: Cavity wall insulation

Potential saving: up to £4/wk

Powys

65.4%

have EPC rating D or below

▲ 13.3% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £9/wk

Reading

48.4%

have EPC rating D or below

▼ 3.7% below England average

Most recommended: Internal or external wall insulation

Potential saving: up to £4/wk

Rhondda Cynon Taf

60.6%

have EPC rating D or below

▲ 8.5% above England average

Most recommended: Internal or external wall insulation

Potential saving: up to £6/wk

Sheffield

52.0%

have EPC rating D or below

▼ 0.1% below England average

Most recommended: Floor insulation (suspended floor)

Potential saving: up to £5/wk

Somerset

42.5%

have EPC rating D or below

▼ 9.6% below England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £8/wk

South Yorkshire

53.6%

have EPC rating D or below

▲ 1.5% above England average

Most recommended: Floor insulation (suspended floor)

Potential saving: up to £5/wk

Southampton

49.6%

have EPC rating D or below

▼ 2.5% below England average

Most recommended: Cavity wall insulation

Potential saving: up to £4/wk

Staffordshire

53.9%

have EPC rating D or below

▲ 1.8% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk

Stoke-on-Trent

57.0%

have EPC rating D or below

▲ 4.9% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £4/wk

Suffolk

52.0%

have EPC rating D or below

▼ 0.1% below England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk

Surrey

52.2%

have EPC rating D or below

▲ 0.1% above England average

Most recommended: Cavity wall insulation

Potential saving: up to £5/wk

Swansea

55.3%

have EPC rating D or below

▲ 3.2% above England average

Most recommended: Cavity wall insulation

Potential saving: up to £5/wk

Warwickshire

48.6%

have EPC rating D or below

▼ 3.5% below England average

Most recommended: Solar water heating

Potential saving: up to £5/wk

West Sussex

50.5%

have EPC rating D or below

▼ 1.6% below England average

Most recommended: Increase loft insulation to 270 mm

Potential saving: up to £5/wk

West Yorkshire

56.9%

have EPC rating D or below

▲ 4.8% above England average

Most recommended: Internal or external wall insulation

Potential saving: up to £5/wk

Wiltshire

47.8%

have EPC rating D or below

▼ 4.3% below England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk

Worcestershire

52.4%

have EPC rating D or below

▲ 0.3% above England average

Most recommended: Floor insulation (solid floor)

Potential saving: up to £5/wk