What insulation adds in N1

66.8 → 75.6

Rating, now → potential

+8.8

Average uplift

£127

Avg saving / yr

39756

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 39756 certificates in N1, the current rating of 66.8 could rise to about 75.6 out of 100. The estimated annual heating cost averages £472 now, and about £344 after the recommended work – an estimated saving of roughly £127 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) – 31.7%
Average thermal transmittance 0.16 W/m²K – 18.3%
Average thermal transmittance 0.17 W/m²K – 12.5%

Recorded as having no wall insulation: 40.0%.

Roofs

(another dwelling above) – 36.7%
(other premises above) – 34.2%
Flat, no insulation (assumed) – 6.7%

Recorded as having no roof insulation: 10.8%.

Glazing

Fully double glazed – 56.8%
Single glazed – 20.5%
Partial secondary glazing – 4.5%

Main heating

Boiler and radiators, mains gas – 48.3%
Community scheme – 44.2%
Room heaters, electric – 2.5%

Which streets need it most

See the streets in N1 with the highest share of homes rated band D or below.

Leakiest streets in N1

Keep exploring

In this area

Leakiest streets in N1 Leaky The leakiest streets here