NN12 is around the national average for energy efficiency.
4.7% of homes are rated F or G — above the national average of 2.9%.
Looking at the energy data for NN12, this West Northamptonshire district scores an average of 69 out of 100, placing it around the national average. Compared to the national average of 67, that puts NN12 around the norm for England and Wales. The most common rating band is B, with 31.0% of homes rated A or B and 53.4% in the C or D bands. Meanwhile, 4.7% of homes sit in the F or G bands — the least efficient categories. In practical terms, a B rating indicates well-insulated homes with efficient heating — energy bills here tend to be well below average.
The area is characterised by houses. Around 71% of properties are owner-occupied . Gas central heating is the main fuel source for 76% 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 69 to 84 — a 15-point jump that would lift the typical rating to B. That is a substantial gain, suggesting many homes are missing basic efficiency measures. If you live in NN12 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 NN12?
Homes in NN12 have an average EPC rating of C, scoring 69 out of 100 for energy efficiency. That figure comes from 9,273 certificates issued across the district.
This is broadly in line with the national average of 67 — neither particularly efficient nor particularly wasteful.
What percentage of homes in NN12 are rated F or G?
4.7% of homes in NN12 fall into the F or G bands — the lowest energy efficiency ratings. Nationally, the figure is 2.9%.
That means NN12 has a higher-than-average proportion of poorly insulated homes. On the positive side, many of these properties may qualify for free improvements through government schemes like ECO4 or the Great British Insulation Scheme. Landlords should note that F and G rated properties cannot legally be rented out under current MEES rules.