Flats across West Yorkshire's five metropolitan boroughs are far less likely than houses to have ever had an Energy Performance Certificate lodged against them — the same broad shape already confirmed in Greater Manchester and the West Midlands. But the specific pattern that drove those two earlier results doesn't repeat here. In both Greater Manchester and the West Midlands, one core city — Manchester, then Birmingham — simultaneously posted the highest house coverage and the lowest flat coverage in its conurbation. In West Yorkshire, Leeds does have the highest house coverage of the five boroughs. The lowest flat coverage, though, belongs to Calderdale, not Leeds.
The five-borough breakdown
| Borough | Flat coverage | Flat addresses (certified / total) | House coverage | House addresses (certified / total) | Flat-house gap |
|---|---|---|---|---|---|
| Calderdale | 22.3% | 1,109 / 4,981 | 72.4% | 40,221 / 55,553 | 50.1pp |
| Bradford | 26.2% | 3,157 / 12,060 | 75.6% | 98,920 / 130,783 | 49.4pp |
| Leeds | 34.9% | 10,433 / 29,872 | 76.7% | 138,837 / 180,971 | 41.8pp |
| Kirklees | 45.2% | 3,024 / 6,690 | 72.9% | 77,781 / 106,657 | 27.7pp |
| Wakefield | 52.5% | 2,395 / 4,562 | 75.6% | 65,954 / 87,232 | 23.1pp |
Figures cover every flat (property_type F) and house (detached, semi-detached or terraced) address matched to the EPC register — at least one certificate ever lodged, regardless of whether it has since expired — cross-referenced against HM Land Registry property records, fetched 19 October 2026.
What "coverage" actually measures
An EPC isn't a periodic requirement like an MOT; it's generated when a home is sold, let, or newly built, and the record stays on file afterwards. So "coverage" here is a proxy for how often a property changes hands or changes tenant, not a measure of how energy-efficient the local housing stock actually is. A flat with no certificate on file hasn't necessarily got a poor rating hiding behind it — it may simply not have been sold or re-let since the register began.
A third conurbation tests the pattern — and partly breaks it
House coverage across the five boroughs sits in a tight 72.4%–76.7% band, a spread of 4.3 percentage points — narrower than Greater Manchester's ten-borough spread (71.9%–78.5%, 6.6pp) and a touch wider than the West Midlands' six-borough spread (72.9%–76.2%, 3.3pp). Flat coverage, by contrast, spans 22.3% to 52.5%, a 30.2-point range — still far wider than the house figures, confirming the basic "stable house turnover, volatile flat turnover" shape for a third time. But it's also the narrowest flat-coverage spread of the three conurbations tested so far, well short of the West Midlands' 45.3-point range and Greater Manchester's 40.2-point range.
What doesn't repeat is the "one city drives both extremes" finding. Manchester had the highest house coverage (78.5%) and the lowest flat coverage (10.2%) in Greater Manchester. Birmingham had the highest house coverage (76.2%) and the lowest flat coverage (20.9%) in the West Midlands. Leeds matches half of that pattern — highest house coverage in West Yorkshire at 76.7% — but its flat coverage, 34.9%, is the third-lowest of the five, not the lowest. That distinction belongs to Calderdale, a smaller, more rural-fringe borough covering Halifax and the upper Calder Valley, with a much smaller flat stock (4,981 addresses against Leeds's 29,872) weighted toward older mill-town conversions rather than the large-scale city-centre apartment schemes that dominate Leeds, Manchester and Birmingham. A bigger city-centre new-build flat market, where completions keep generating fresh certificates, may be part of why Leeds's flat coverage sits closer to the middle of the pack than to the bottom.
Price doesn't fully explain it
| Borough | 2025 flat median | Flat coverage |
|---|---|---|
| Leeds | £155,000 | 34.9% |
| Calderdale | £135,000 | 22.3% |
| Bradford | £127,000 | 26.2% |
| Kirklees | £111,000 | 45.2% |
| Wakefield | £109,250 | 52.5% |
Across these five boroughs, flat coverage and flat price have a moderate negative relationship (Pearson r = −0.61 on these five data points) — cheaper flat markets tend to have somewhat better EPC coverage, in the same direction as the West Midlands finding (r = −0.665) though a little weaker. The relationship is far from clean: Leeds has the most expensive flats and only middling coverage, while Calderdale's flats are the second most expensive yet have the lowest coverage of the five. With only five boroughs in the sample, this is a loose pattern to flag rather than a reliable rule.
Council tax tracks none of this either: 2026-27 Band D bills across the five boroughs run from Leeds's £2,283.73 to Kirklees's £2,441.07 (gov.uk) — a gap that reflects each authority's own tax-setting decisions, not EPC coverage or the local flat-to-house mix.
What this means if you're buying a flat
A flat with no EPC on record anywhere in West Yorkshire isn't unusual, least of all in Calderdale or Bradford — it just means the current owner hasn't needed to commission one recently. Sellers are legally required to provide a valid certificate before marketing a home, so one will exist by completion even where none shows up in historical records yet. Anyone comparing a flat against a house in the same borough should expect the flat to be the one more likely to have gaps in its EPC history, for reasons that have more to do with how often it changes hands than with how efficient it actually is.
This analysis draws on EPC and Land Registry records for 619,361 residential addresses across West Yorkshire's five boroughs — part of the growing data set behind every Homecost guide. Try it on a specific address: search BD1 2AA in Bradford city centre, one of the two lowest-flat-coverage boroughs in this piece, to see live sale history and EPC data side by side.
For the national picture, see the UK areas where fewest homes have ever had an EPC. For the other two conurbations tested the same way, see Greater Manchester's ten-borough breakdown and the West Midlands' six-borough breakdown, or browse more cost intelligence guides.