Leakiest streets in EC4Y

47.4%

Band D or below

321

Certificates

63.0

Average rating

£405

Avg potential saving / yr

What this means

Across 321 energy certificates in EC4Y, 152 (47.4%) are rated band D or below. The average current rating is 63.0 out of 100, which the recommended improvements on those certificates would lift to about 77.0. The average estimated annual heating cost is £768, falling to about £363 after the recommended work – a saving of roughly £405 a year.

A B C D E F G

A 0.6% B 7.5% C 44.5% D 33.3% E 11.5% F 2.2% G 0.3%

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

How EC4Y 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 47.4%, 4.3 points lower (more efficient).
The average current rating here is 63.0, 4.8 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%
Timber frame, as built, no insulation (assumed) – 10.0%
System built, as built, insulated (assumed) – 7.5%

Recorded as having no wall insulation: 82.5%.

Roofs

(another dwelling above) – 42.5%
Flat, no insulation (assumed) – 22.5%
Pitched, 250 mm loft insulation – 17.5%

Recorded as having no roof insulation: 30.0%.

Glazing

Single glazed – 48.5%
Fully double glazed – 24.2%
Full secondary glazing – 9.1%

Main heating

Boiler and radiators, mains gas – 65.0%
Room heaters, electric – 17.5%
Community scheme – 12.5%

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 EC4Y

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