PO3 is around the national average for energy efficiency.
Energy efficiency in PO3 (Portsmouth) sits at an average score of 66 out of 100, placing it around the national average. To put this in context, the national average sits at 67. The most common rating band is D, with 11.1% of homes rated A or B and 76.8% in the C or D bands. Meanwhile, 1.6% of homes sit in the F or G bands — the least efficient categories. In practical terms, a rating of D means many homes here lose more heat than average — potentially adding £200-400 per year to energy bills compared to a C-rated home.
Most of the housing stock here consists of houses. Flats make up a notable 24% of homes here. Around 68% of properties are owner-occupied , while 21% are privately rented . 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 66 to 81 — 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 PO3 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: 81 (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 PO3?
Homes in PO3 have an average EPC rating of D, scoring 66 out of 100 for energy efficiency. That figure comes from 6,160 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 PO3 are rated F or G?
1.6% of homes in PO3 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 PO3 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.