What insulation adds in N4
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 9571 certificates in N4, the current rating of 65.1 could rise to about 77.5 out of 100. The estimated annual heating cost averages £573 now, and about £350 after the recommended work – an estimated saving of roughly £223 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) – 62.5%
- Cavity wall, as built, insulated (assumed) – 5.8%
- Average thermal transmittance 0.20 W/m²K – 4.2%
Recorded as having no wall insulation: 66.7%.
Roofs
- (another dwelling above) – 46.7%
- Pitched, no insulation (assumed) – 9.2%
- (other premises above) – 9.2%
Recorded as having no roof insulation: 15.8%.
Glazing
- Fully double glazed – 69.8%
- Single glazed – 9.5%
- Partial double glazing – 9.5%
Main heating
- Boiler and radiators, mains gas – 67.5%
- Community scheme – 17.5%
- Room heaters, electric – 8.3%
Which streets need it most
See the streets in N4 with the highest share of homes rated band D or below.
Leakiest streets in N4Keep exploring
Biggest average savings nearby
- What insulation adds in N8 ~£260/yr average saving
- What insulation adds in N6 ~£198/yr average saving
- What insulation adds in NW5 ~£157/yr average saving
- What insulation adds in N16 ~£145/yr average saving
- What insulation adds in WC1X ~£138/yr average saving
- What insulation adds in N1 ~£127/yr average saving
- What insulation adds in N5 ~£127/yr average saving
- What insulation adds in OX28 ~£116/yr average saving