What insulation adds in WC1A

69.3 → 76.8

Rating, now → potential

+7.4

Average uplift

£149

Avg saving / yr

673

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 673 certificates in WC1A, the current rating of 69.3 could rise to about 76.8 out of 100. The estimated annual heating cost averages £470 now, and about £321 after the recommended work – an estimated saving of roughly £149 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) – 45.0%
Granite or whin, as built, no insulation (assumed) – 12.5%
Cavity wall, as built, insulated (assumed) – 12.5%

Recorded as having no wall insulation: 62.5%.

Roofs

(another dwelling above) – 50.0%
(other premises above) – 17.5%
Flat, no insulation (assumed) – 15.0%

Recorded as having no roof insulation: 17.5%.

Glazing

Single glazed – 33.3%
Fully double glazed – 33.3%
Full secondary glazing – 33.3%

Main heating

Boiler and radiators, mains gas – 57.5%
Community scheme – 17.5%
Boiler and radiators, electric – 12.5%

Which streets need it most

See the streets in WC1A with the highest share of homes rated band D or below.

Leakiest streets in WC1A

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