What insulation adds in SW16

62.6 → 75.6

Rating, now → potential

+13.0

Average uplift

£193

Avg saving / yr

20951

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 20951 certificates in SW16, the current rating of 62.6 could rise to about 75.6 out of 100. The estimated annual heating cost averages £703 now, and about £510 after the recommended work – an estimated saving of roughly £193 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) – 66.2%
Cavity wall, as built, no insulation (assumed) – 10.0%
Cavity wall, as built, insulated (assumed) – 7.5%

Recorded as having no wall insulation: 77.5%.

Roofs

Pitched, no insulation (assumed) – 27.5%
(another dwelling above) – 20.0%
Pitched, 100 mm loft insulation – 11.2%

Recorded as having no roof insulation: 32.5%.

Glazing

Fully double glazed – 90.0%
Mostly double glazing – 6.7%
Some double glazing – 1.7%

Main heating

Boiler and radiators, mains gas – 86.2%
Electric storage heaters – 6.2%
Room heaters, electric – 3.8%

Which streets need it most

See the streets in SW16 with the highest share of homes rated band D or below.

Leakiest streets in SW16

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