Flat Price vs EPC Coverage: Testing 21 English Boroughs 2026

Does a cheaper flat market really come with better Energy Performance Certificate (EPC) coverage? Pooling the three English metropolitan conurbations already tested this way - Greater Manchester, the West Midlands and West Yorkshire - gives a 21-borough sample where the relationship is strong: a Pearson correlation of -0.785 between a borough's 2025 median flat sale price and the share of its flats that have ever had an EPC lodged. But splitting the same 21 boroughs back into their three conurbations shows that single pooled number hides three very different stories, and the strongest of the three belongs to the one city a previous piece used to argue price doesn't explain coverage at all.

What "coverage" measures

An EPC isn't a periodic check like an MOT - it's generated when a home is sold, let, or newly built, and the record stays on file afterwards. "Coverage" here means the share of flat addresses with at least one certificate ever logged, regardless of whether it has since expired. A low figure is a sign of low turnover, not a sign of poor energy efficiency: a flat that hasn't changed hands or been re-let since the EPC register began in 2008 simply won't have a certificate yet, however efficient it is.

The 21 boroughs, ranked by price

All 2025 median flat prices are standard Land Registry sales (category A, property type F), queried fresh on 22 October 2026. EPC coverage figures are the certified-ever share of flat addresses already published for each conurbation.

Pooled across all 21, the correlation between price and coverage is -0.785: as median flat price rises, coverage tends to fall, broadly consistent with the idea that cheaper flat stock turns over more often and so has more certificates on file.

One pooled number, three different strengths

Re-running the same calculation separately within each conurbation tells a different story:

*London figure previously published in a 33-borough EPC coverage comparison; not part of this piece's own 21-borough pool.

Greater Manchester's -0.964 is the strongest relationship found anywhere this pattern has been tested - with only 10 data points it should be read cautiously, since a single outlier can swing a correlation calculated on that few boroughs, but every borough here falls close to the line: Manchester, Salford and Trafford combine the conurbation's highest flat prices with its three lowest coverage figures, while Bolton and Wigan combine the lowest prices with the two highest coverage figures.

That is the opposite of what an earlier national comparison implied. That piece used Manchester as evidence that price does not explain coverage, pointing out that Manchester's 10.2% flat coverage sits almost level with Kensington and Chelsea's 9.4% despite a £735,000 gap in median flat price between the two. Both facts are true at once: across England as a whole, two boroughs with wildly different prices can land on near-identical coverage figures, while inside Greater Manchester specifically, price is one of the tightest predictors of coverage found in any of this series of comparisons. A single cross-country pair proves less than a same-region ranking of ten.

Where the pattern weakens

The West Midlands and West Yorkshire relationships are real but far looser. Solihull breaks the West Midlands pattern: its flats are the region's most expensive (£182,500) yet its coverage (44.3%) sits mid-table rather than at the bottom, which is why that conurbation's r (-0.665) is markedly weaker than Greater Manchester's. West Yorkshire is weaker again (-0.61): Calderdale's flats are the second most expensive of the five boroughs (£135,000) yet have the lowest coverage of any of them (22.3%), the reverse of what the price relationship would predict. Leeds, the conurbation's biggest and priciest flat market by addresses, lands closer to the middle of the coverage ranking than to the bottom.

None of this means price is irrelevant - in every one of the three conurbations, and in the pooled 21-borough sample, cheaper flat markets tend toward better coverage, not worse. It means the strength of that relationship varies a great deal by region, and a single national-level comparison between two specific areas - however striking the numbers look - says little about how reliable the pattern is anywhere else.

Why this matters if you're buying a flat

None of these figures describe how energy-efficient any specific flat is, and none should be read as a reason to avoid - or favour - buying in a low-coverage borough. A missing EPC on a specific address simply means that flat hasn't been sold, let, or newly built recently enough to generate one; a seller is legally required to provide a valid certificate before marketing a home, so one will exist by completion regardless of what historical records show. You can check whether a specific address already has a certificate using the government's own lookup before assuming a survey or assessment is needed. Try a live example on the Homecost tool - M1 1AE in Manchester city centre, the single borough with the tightest price-coverage relationship in this comparison - to see recorded sale history and EPC data for a real address.

Sources and further reading

This analysis draws on HM Land Registry Price Paid Data and the EPC Open Data Communities register for the three conurbations already profiled individually: Greater Manchester's ten boroughs, the West Midlands' six boroughs and West Yorkshire's five boroughs, alongside the national EPC coverage ranking and the three-conurbation mirror comparison that first set Manchester, Birmingham and Leeds side by side. Browse more cost intelligence guides covering EPC data, stamp duty and the true cost of buying.