What insulation adds in SW1W

62.9 → 72.7

Rating, now → potential

+9.8

Average uplift

£177

Avg saving / yr

1022

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 1022 certificates in SW1W, the current rating of 62.9 could rise to about 72.7 out of 100. The estimated annual heating cost averages £624 now, and about £447 after the recommended work – an estimated saving of roughly £177 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) – 70.0%
Solid brick, with internal insulation – 7.5%
System built, as built, no insulation (assumed) – 5.0%

Recorded as having no wall insulation: 80.0%.

Roofs

(another dwelling above) – 70.0%
Flat, no insulation (assumed) – 10.0%
Pitched, no insulation (assumed) – 7.5%

Recorded as having no roof insulation: 17.5%.

Glazing

Single glazed – 19.0%
Partial secondary glazing – 19.0%
Partial double glazing – 19.0%

Main heating

Boiler and radiators, mains gas – 82.5%
Room heaters, electric – 7.5%
Boiler and radiators, electric – 5.0%

Which streets need it most

See the streets in SW1W with the highest share of homes rated band D or below.

Leakiest streets in SW1W

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