What insulation adds in SW13

62.5 → 73.0

Rating, now → potential

+10.6

Average uplift

£153

Avg saving / yr

8048

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 8048 certificates in SW13, the current rating of 62.5 could rise to about 73.0 out of 100. The estimated annual heating cost averages £876 now, and about £724 after the recommended work – an estimated saving of roughly £153 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) – 52.5%
Cavity wall, as built, insulated (assumed) – 22.5%
Cavity wall, as built, no insulation (assumed) – 10.0%

Recorded as having no wall insulation: 62.5%.

Roofs

(another dwelling above) – 32.5%
Pitched, insulated (assumed) – 12.5%
Pitched, no insulation (assumed) – 10.0%

Recorded as having no roof insulation: 17.5%.

Glazing

Fully double glazed – 75.0%
Some double glazing – 5.0%
Single glazed – 5.0%

Main heating

Boiler and radiators, mains gas – 85.0%
Room heaters, mains gas – 5.0%
Community scheme – 5.0%

Which streets need it most

See the streets in SW13 with the highest share of homes rated band D or below.

Leakiest streets in SW13

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