City-centre flats hold greener EPC ratings than houses, 2026

In five of England's largest cities, a flat is far more likely to carry a good energy rating than the housing stock around it. In Manchester, 64.0% of flats on the Energy Performance Certificate (EPC) register hold a band of C or above — nearly double the 34.1% recorded across all the city's homes. The same gap turns up, to varying degrees, in every city we looked at.

It is not a quality judgement about flats versus houses. It is a story about when things were built — and it has practical consequences for anyone comparing the running costs of a city-centre apartment against a suburban house.

The figures below come from the domestic EPC register — more than 2.1 million certificates across the five cities — queried on 20 June 2026.

The gap, city by city

Domestic EPC register, all valid certificates A–G, grouped by local authority. Flat certificate counts: Bristol 9,903; Manchester 7,117; Leeds 18,299; Birmingham 13,396; London (all 33 boroughs) 319,987. Data fetched 20 June 2026.

The direction is the same everywhere: flats out-rate the wider stock by between 18 and 30 percentage points. Bristol shows the widest gap and London the narrowest — more on London below.

Why flats rate higher: it is about age, not type

An EPC band largely reflects the fabric of a building — its insulation, glazing, heating system and air-tightness — and those things track the era it was built in. The energy standard for new homes in England and Wales has been tightened repeatedly since 2000 under the building regulations, so a newer home starts from a higher baseline.

City-centre flats are disproportionately new. Across the national EPC register, 20.4% of flats with a recorded construction age were built in 2003 or later, against just 9.3% of houses — flats are more than twice as likely to be 21st-century stock. The apartment blocks that fill regenerated docks, converted mills and rebuilt city cores went up overwhelmingly in the last 25 years, to modern insulation standards. The houses around them — Victorian terraces, interwar semis, postwar estates — are mostly older and harder to lift to band C.

That is the whole mechanism. Flats are not inherently efficient; they are, on average, newer, and newer is what an EPC rewards.

Reading the absolute numbers

The size of the gap is consistent, but the level of flat ratings is not. Manchester, Bristol and Leeds all sit in the high 50s to low 60s for the share of flats rated C or above; Birmingham and London sit closer to 46–47%. The difference comes down to how modern each city's flat stock is. Where the apartment supply is dominated by recent purpose-built blocks, the share rated C or above is highest. Where a larger slice of the "flats" are older subdivided houses, it falls back — which is exactly the London story below.

Bristol in detail: where the bands sit

Bristol shows the pattern most sharply. Splitting the city's EPC register by band makes the shift visible:

City of Bristol EPC register: 9,903 flat certificates, 104,263 all-domestic certificates. Fetched 20 June 2026.

The most common band for a Bristol flat is C; for the housing stock as a whole it is D. The flats cluster in the B–C range, while the wider stock spreads down into D and E. Manchester, Leeds and Birmingham follow the same shape.

The London exception

London has the smallest flat-versus-stock gap of the five — 18.6 points, against roughly 30 in Bristol and Manchester. The reason is the composition of London's flats. Alongside its modern towers, the capital holds an enormous inventory of conversion flats: Victorian and Georgian houses subdivided into apartments. Those are among the oldest buildings in the country, with solid walls and single-glazed sashes that are difficult and costly to insulate. They drag London's flat ratings down toward the wider average, compressing the gap.

So the rule — flats rate higher than the local stock — holds in London too; it is just muted by the city's deep reserve of period conversions. You can see how that feeds through to prices and running costs in our look at central London's flat market and, for the contrast, Manchester's city-centre flat market, where the stock is overwhelmingly modern.

What an EPC band does — and does not — tell you

An EPC is a useful signal, but it has limits worth understanding before you lean on it.

• The band reflects the building, not your bill. The modelled annual running-cost figure printed on a certificate is built on dated cost assumptions and will not match what a household actually pays under current energy prices. Treat the A–G band as a guide to the fabric of the property; treat the pounds-and-pence estimate with caution. For a worked illustration of how running costs change between bands, see what each EPC rating costs to run.
• Bands vary within a single building. A block can hold a spread of ratings depending on floor, exposure and any individual upgrades. A city average tells you nothing about one specific property.
• A certificate can be up to ten years old. Anything done since — a new boiler, fresh insulation — may not show until the next assessment.

This is general information, not advice. Speak to a qualified adviser before acting on it.

What it means if you are comparing a flat and a house

If you are weighing a city-centre flat against a house — a common trade-off, and one we break down in the cost of buying a flat versus a house — energy efficiency tends to sit quietly on the flat's side of the ledger, simply because the flat is more likely to be newer. That can mean a lower heating demand, though service charges and ground rent pull the other way on a flat's total running cost.

The only rating that matters for a specific home is its own certificate. To see the all-in cost picture for a real address — mortgage at the current Bank of England quoted rate, council tax, energy and stamp duty in one place — check the true cost of a Manchester flat or any postcode you are considering.

More data-led property breakdowns sit in our market analysis section, all built on the same public datasets: over 2.1 million domestic EPC certificates and 31 million Land Registry records.