What insulation adds in SE20

67.0 → 74.9

Rating, now → potential

+8.0

Average uplift

£106

Avg saving / yr

14907

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 14907 certificates in SE20, the current rating of 67.0 could rise to about 74.9 out of 100. The estimated annual heating cost averages £490 now, and about £384 after the recommended work – an estimated saving of roughly £106 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) – 40.0%
Cavity wall, as built, no insulation (assumed) – 17.5%
Cavity wall, as built, insulated (assumed) – 12.5%

Recorded as having no wall insulation: 60.0%.

Roofs

(another dwelling above) – 47.5%
(other premises above) – 10.0%
Pitched, insulated (assumed) – 5.0%

Recorded as having no roof insulation: 7.5%.

Glazing

Fully double glazed – 84.2%
Some double glazing – 10.5%
Mostly double glazing – 5.3%

Main heating

Boiler and radiators, mains gas – 72.5%
Electric storage heaters – 12.5%
Community scheme – 7.5%

Which streets need it most

See the streets in SE20 with the highest share of homes rated band D or below.

Leakiest streets in SE20

Keep exploring

In this area

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