Leakiest streets in SW1W

57.0%

Band D or below

1022

Certificates

62.9

Average rating

£177

Avg potential saving / yr

What this means

Across 1022 energy certificates in SW1W, 583 (57.0%) are rated band D or below. The average current rating is 62.9 out of 100, which the recommended improvements on those certificates would lift to about 72.7. The average estimated annual heating cost is £624, falling to about £447 after the recommended work – a saving of roughly £177 a year.

B C D E F G

B 6.3% C 36.7% D 37.1% E 15.2% F 3.5% G 1.3%

Every figure is computed across the certificates in this area – no individual property is identified or listed.

How SW1W compares

Set against the average across the 3,339,357 energy certificates in our dataset (average current rating 67.8, with 51.7% band D or below):

Band D or below here is 57.0%, 5.3 points higher (leakier).
The average current rating here is 62.9, 4.9 points below the wider-dataset average.

Indicative comparison against the certificates we hold, not an official national statistic. Check the official source for area statistics.

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) – 70.0%
Solid brick, with internal insulation – 7.5%
System built, as built, no insulation (assumed) – 5.0%

Recorded as having no wall insulation: 80.0%.

Roofs

(another dwelling above) – 70.0%
Flat, no insulation (assumed) – 10.0%
Pitched, no insulation (assumed) – 7.5%

Recorded as having no roof insulation: 17.5%.

Glazing

Single glazed – 19.0%
Partial secondary glazing – 19.0%
Partial double glazing – 19.0%

Main heating

Boiler and radiators, mains gas – 82.5%
Room heaters, electric – 7.5%
Boiler and radiators, electric – 5.0%

Retrofit measures for this housing stock

Based on the construction recorded on the certificates here, these guides cover the measures that most often apply, with typical UK costs and savings cited to public sources.

All retrofit guides

What insulation adds in SW1W

See the average current-to-potential uplift and the estimated heating-cost saving for this area.