SN25 is above average for energy efficiency — better than most areas in England and Wales.
Data from 14,142 property assessments shows SN25 averaging 74 out of 100, placing it above the national average. For reference, the England and Wales average is 67 — so SN25 is above that benchmark. The most common rating band is C, with 27.1% of homes rated A or B and 68.8% in the C or D bands. Meanwhile, 0.5% 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 SN25 and you will mostly see houses. Around 72% of properties are owner-occupied . Gas central heating is the main fuel source for 94% 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 74 to 84 — a 10-point jump that would lift the typical rating to B. If you live in SN25 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
Energy Efficiency Score
Potential score if all improvements made: 84 (rating B)
Recommended Improvements
Government funding may be available for some of these improvements. Check grants →
More data — property types, tenure & fuel
Property Types
Tenure
Main Fuel Types
Frequently asked questions
What is the average EPC rating in SN25?
Homes in SN25 have an average EPC rating of C, scoring 74 out of 100 for energy efficiency. That figure comes from 14,142 certificates issued across the district.
To put that in perspective, SN25 performs better than most areas in England and Wales — the national average is just 67.
What percentage of homes in SN25 are rated F or G?
0.5% of homes in SN25 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 SN25 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.