Leakiest streets in SW3

54.3%

Band D or below

20293

Certificates

62.5

Average rating

£168

Avg potential saving / yr

What this means

Across 20293 energy certificates in SW3, 11014 (54.3%) are rated band D or below. The average current rating is 62.5 out of 100, which the recommended improvements on those certificates would lift to about 72.7. The average estimated annual heating cost is £704, falling to about £536 after the recommended work – a saving of roughly £168 a year.

A B C D E F G

A 0.1% B 4.7% C 41.0% D 36.0% E 14.2% F 3.2% G 0.8%

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

How SW3 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 54.3%, 2.6 points higher (leakier).
The average current rating here is 62.5, 5.3 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) – 75.0%
System built, as built, no insulation (assumed) – 7.5%
Solid brick, with internal insulation – 2.5%

Recorded as having no wall insulation: 85.0%.

Roofs

(another dwelling above) – 65.0%
Flat, no insulation (assumed) – 20.0%
Roof room(s), insulated (assumed) – 2.5%

Recorded as having no roof insulation: 20.0%.

Glazing

Single glazed – 50.0%
Fully double glazed – 37.5%
Partial double glazing – 12.5%

Main heating

Community scheme – 37.5%
Boiler and radiators, mains gas – 37.5%
Room heaters, electric – 7.5%

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 SW3

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