What insulation adds in SW3

62.5 → 72.7

Rating, now → potential

+10.2

Average uplift

£168

Avg saving / yr

20293

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 20293 certificates in SW3, the current rating of 62.5 could rise to about 72.7 out of 100. The estimated annual heating cost averages £704 now, and about £536 after the recommended work – an estimated saving of roughly £168 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) – 75.0%
System built, as built, no insulation (assumed) – 7.5%
Solid brick, with internal insulation – 2.5%

Recorded as having no wall insulation: 85.0%.

Roofs

(another dwelling above) – 65.0%
Flat, no insulation (assumed) – 20.0%
Roof room(s), insulated (assumed) – 2.5%

Recorded as having no roof insulation: 20.0%.

Glazing

Single glazed – 50.0%
Fully double glazed – 37.5%
Partial double glazing – 12.5%

Main heating

Community scheme – 37.5%
Boiler and radiators, mains gas – 37.5%
Room heaters, electric – 7.5%

Which streets need it most

See the streets in SW3 with the highest share of homes rated band D or below.

Leakiest streets in SW3

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