What insulation adds in SE12

67.8 → 80.2

Rating, now → potential

+12.4

Average uplift

£124

Avg saving / yr

2684

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 2684 certificates in SE12, the current rating of 67.8 could rise to about 80.2 out of 100. The estimated annual heating cost averages £545 now, and about £421 after the recommended work – an estimated saving of roughly £124 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

Cavity wall, filled cavity – 42.5%
Cavity wall, as built, no insulation (assumed) – 35.0%
Solid brick, as built, no insulation (assumed) – 17.5%

Recorded as having no wall insulation: 55.0%.

Roofs

(another dwelling above) – 32.5%
Pitched, 100 mm loft insulation – 12.5%
Pitched, 300 mm loft insulation – 10.0%

Recorded as having no roof insulation: 5.0%.

Glazing

Fully double glazed – 84.0%
Some double glazing – 4.0%
Partial double glazing – 4.0%

Main heating

Boiler and radiators, mains gas – 92.5%
Community scheme – 5.0%
Boiler and radiators, LPG – 2.5%

Which streets need it most

See the streets in SE12 with the highest share of homes rated band D or below.

Leakiest streets in SE12

Keep exploring

In this area

Leakiest streets in SE12 Leaky The leakiest streets here