What insulation adds in N21

61.6 → 76.3

Rating, now → potential

+14.7

Average uplift

£231

Avg saving / yr

9293

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 9293 certificates in N21, the current rating of 61.6 could rise to about 76.3 out of 100. The estimated annual heating cost averages £785 now, and about £554 after the recommended work – an estimated saving of roughly £231 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) – 55.0%
Cavity wall, as built, no insulation (assumed) – 15.0%
Solid brick, as built, insulated (assumed) – 7.5%

Recorded as having no wall insulation: 75.0%.

Roofs

(another dwelling above) – 32.5%
Pitched, no insulation (assumed) – 22.5%
Pitched, 100 mm loft insulation – 7.5%

Recorded as having no roof insulation: 32.5%.

Glazing

Fully double glazed – 87.5%
Some double glazing – 8.3%
Some secondary glazing – 4.2%

Main heating

Boiler and radiators, mains gas – 85.0%
Room heaters, electric – 5.0%
Warm air, mains gas – 2.5%

Which streets need it most

See the streets in N21 with the highest share of homes rated band D or below.

Leakiest streets in N21

Keep exploring

In this area

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