EPC.Report
D
WD23 Hertsmere
Hertsmere Rating D Score: 68 / 100

WD23 is around the national average for energy efficiency.

Data from 8,651 property assessments shows WD23 averaging 68 out of 100, placing it around the national average. For reference, the England and Wales average is 67 — so WD23 is around that benchmark. The most common rating band is C, with 16.8% of homes rated A or B and 70.4% in the C or D bands. Meanwhile, 1.8% of homes sit in the F or G bands — the least efficient categories. In practical terms, a C rating suggests reasonably efficient homes, though there is still room for improvement on heating and insulation.

Walk through WD23 and you will mostly see houses. Flats make up a notable 36% of homes here. Around 65% of properties are owner-occupied . Gas central heating is the main fuel source for 88% of homes, which is typical for urban areas across England.

There is genuine room for improvement here. If every recommended upgrade were carried out, the average score could climb from 68 to 80 — a 12-point jump that would lift the typical rating to C. If you live in WD23 and want to reduce your energy bills, start with our guide to loft insulation — it is one of the most cost-effective upgrades you can make.

EPC Rating Distribution

A
6 (0.1%)
B
1,445 (16.7%)
C
3,073 (35.5%)
D
3,021 (34.9%)
E
947 (10.9%)
F
136 (1.6%)
G
23 (0.3%)

Energy Efficiency Score

68
WD23 avg
67
National avg
+1 points vs national average

Potential score if all improvements made: 80 (rating C)

Recommended Improvements

Government funding may be available for some of these improvements. Check grants →

More data — property types, tenure & fuel

Property Types

3,106
Flat
4,695
House
372
Bungalow
476
Maisonette
2
Park home

Tenure

4,777
Owner-occupied
1,488
Private rented
1,115
Social rented

Main Fuel Types

7,648
gas
921
electric
5
oil
77
other

Frequently asked questions

What is the average EPC rating in WD23?

Homes in WD23 have an average EPC rating of D, scoring 68 out of 100 for energy efficiency. That figure comes from 8,651 certificates issued across the district.

This is broadly in line with the national average of 67 — neither particularly efficient nor particularly wasteful. A D rating typically means higher-than-necessary heating bills, especially in older properties without adequate insulation.

What percentage of homes in WD23 are rated F or G?

1.8% of homes in WD23 fall into the F or G bands — the lowest energy efficiency ratings. Nationally, the figure is 2.9%.

This is actually better than the national picture, suggesting the housing stock in WD23 is in relatively good shape — though any home rated F or G would still benefit enormously from basic upgrades. Landlords should note that F and G rated properties cannot legally be rented out under current MEES rules.

See all EPC data for Hertsmere →