What insulation adds in W12

62.9 → 74.3

Rating, now → potential

+11.4

Average uplift

£187

Avg saving / yr

30827

Certificates

The realistic uplift

Each energy certificate lists the improvements an assessor recommends and the rating the home would reach if they were done. Averaged across 30827 certificates in W12, the current rating of 62.9 could rise to about 74.3 out of 100. The estimated annual heating cost averages £608 now, and about £422 after the recommended work – an estimated saving of roughly £187 a year.

These are the register's own estimates, averaged across many homes; the figure for any one property depends on its fabric and how it is heated.

What the certificates say about the fabric

The most common construction descriptions recorded across these certificates. Percentages are of certificates where the field was recorded.

Walls

Solid brick, as built, no insulation (assumed) – 82.5%
Cavity wall, as built, no insulation (assumed) – 3.8%
Cavity wall, with internal insulation – 2.5%

Recorded as having no wall insulation: 87.5%.

Roofs

(another dwelling above) – 42.5%
Pitched, no insulation (assumed) – 23.8%
Pitched, 100 mm loft insulation – 5.0%

Recorded as having no roof insulation: 25.0%.

Glazing

Fully double glazed – 50.0%
Partial double glazing – 21.1%
Single glazed – 13.2%

Main heating

Boiler and radiators, mains gas – 81.2%
Community scheme – 7.5%
Room heaters, mains gas – 2.5%

Which streets need it most

See the streets in W12 with the highest share of homes rated band D or below.

Leakiest streets in W12

Keep exploring

In this area

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