What insulation adds in N20

65.0 → 76.0

Rating, now → potential

+11.1

Average uplift

£254

Avg saving / yr

9547

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 9547 certificates in N20, the current rating of 65.0 could rise to about 76.0 out of 100. The estimated annual heating cost averages £716 now, and about £462 after the recommended work – an estimated saving of roughly £254 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, no insulation (assumed) – 20.0%
Cavity wall, as built, insulated (assumed) – 12.5%

Recorded as having no wall insulation: 62.5%.

Roofs

(another dwelling above) – 25.0%
Pitched, no insulation (assumed) – 15.0%
Pitched, 100 mm loft insulation – 12.5%

Recorded as having no roof insulation: 17.5%.

Glazing

Fully double glazed – 80.0%
Mostly double glazing – 8.0%
Single glazed – 4.0%

Main heating

Boiler and radiators, mains gas – 70.0%
Community scheme – 10.0%
Room heaters, electric – 7.5%

Which streets need it most

See the streets in N20 with the highest share of homes rated band D or below.

Leakiest streets in N20

Keep exploring

In this area

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