What insulation adds in SW19

66.2 → 74.5

Rating, now → potential

+8.3

Average uplift

£115

Avg saving / yr

38838

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 38838 certificates in SW19, the current rating of 66.2 could rise to about 74.5 out of 100. The estimated annual heating cost averages £576 now, and about £461 after the recommended work – an estimated saving of roughly £115 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) – 42.5%
Cavity wall, as built, insulated (assumed) – 22.5%
Timber frame, as built, insulated (assumed) – 5.0%

Recorded as having no wall insulation: 50.0%.

Roofs

(another dwelling above) – 30.0%
Pitched, no insulation (assumed) – 12.5%
Pitched, 100 mm loft insulation – 12.5%

Recorded as having no roof insulation: 20.0%.

Glazing

Fully double glazed – 63.6%
Partial double glazing – 18.2%
High performance glazing – 9.1%

Main heating

Boiler and radiators, mains gas – 70.0%
Electric storage heaters – 12.5%
Room heaters, electric – 5.0%

Which streets need it most

See the streets in SW19 with the highest share of homes rated band D or below.

Leakiest streets in SW19

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