Bristol EPC ratings by postcode: the retrofit gap, 2026

Across 71,151 Bristol homes with a current Energy Performance Certificate, 33.9% are rated C or better. But that citywide figure hides a striking split: Bristol's most expensive postcodes to buy in are, on average, some of the coldest on paper — while several of its cheapest are among the warmest. Energy efficiency here tracks the age of the housing far more closely than what it costs.

This is a look at how energy ratings are distributed across Bristol's BS postcodes, using Energy Performance Certificate lodgements and HM Land Registry sold-price records. It reports what the data shows about the existing stock — not what any individual home is worth, and not what anyone should do about it.

Figures below were compiled on 3 September 2026 from the current EPC register (latest certificate per address, so re-lodged and superseded certificates aren't double-counted) and Land Registry price-paid records for 2025 (standard sales of houses and flats in the City of Bristol local authority, E06000023). Council tax is the 2026-27 Band D charge.

Energy ratings by postcode

The table ranks each Bristol postcode district by its 2025 median sold price, alongside the share of homes rated EPC C or better. Postcodes are included where at least 200 homes have a current certificate and at least 30 standard sales completed in 2025.

The pattern at the extremes runs opposite to what many buyers would guess. BS1, the cheapest district on the list at a £290,000 median, is also the greenest — 58.9% of its certificated homes rate C or better, easily the highest share in the city. At the other end, BS9 around Stoke Bishop and Sneyd Park is the most expensive district, at £611,000, yet only 25.9% of its homes clear band C.

Widen the lens and the same inversion holds. Bristol's five priciest postcode districts on this table — BS9, BS6, BS7, BS8 and BS3 — average 28.2% EPC C-or-better, below the citywide 33.9%. Its five cheapest — BS1, BS13, BS11, BS2 and BS14 — average 43.6%, well above it. The sharpest single case is BS6 (Redland, Cotham, Bishopston): the second-dearest district in the city at £475,000, and the coldest on paper, at 19.9%.

That doesn't mean price and efficiency move in lockstep the other way either. BS7 (Horfield, Ashley Down), the third-priciest district, sits almost exactly on the citywide average at 33.6%. Price and EPC rating are related to a common cause, not to each other directly.

Why the gap follows build era

The common cause is when the housing was built. Sorting Bristol's certificates by construction era produces a steep, consistent gradient:

The step from the 1976–2002 band (58.6%) to 2003 onwards (96.3%) is the sharpest in the series. It lines up with the 2002 revision to Part L of the Building Regulations, which tightened the insulation, glazing and heating standards new homes in England and Wales had to meet. Homes built after that point start life close to band C or above by default; older homes only get there through retrofit work.

That explains the postcode table almost entirely. BS6 is 85.6% pre-1950 stock and just 5.1% built since 2003 — a dense core of Victorian and Edwardian terraces around Redland and Cotham, with very little modern building to lift the average. BS9 is 55.6% pre-1950 and only 1.5% post-2003 — an established, largely built-out suburb where new development is scarce. Compare that with BS1, at 33.3% pre-1950 but 31.4% built since 2003, reflecting the flats and conversions that have gone up in Bristol's centre over the past two decades, and BS10, at 28.8% pre-1950 with 10.3% post-2003, a mix of inter-war and post-war estate housing around Southmead and Henbury topped up with newer infill. Bristol's coldest postcodes on paper are its oldest; its warmest are its newest or most recently redeveloped — price barely enters into it.

This is best read as a story about housing stock, not about the people who live in each postcode. The same 2003 cliff shows up in the equivalent breakdowns for Doncaster's EPC retrofit gap and Rotherham's EPC ratings by outcode — a national pattern that plays out differently here only because Bristol's most expensive addresses happen to sit in its oldest streets, rather than its newest ones.

What a rating band means for running costs

An EPC estimates how efficiently a home uses energy, and a lower band generally implies higher modelled heating and lighting costs than a higher band of the same size. The certificate also lists modelled improvements — insulation, glazing, heating upgrades — that would move a property up the scale. Those are modelled figures, not bills, and actual costs depend on the property, its occupants and prevailing energy prices. For how the bands translate into typical running costs, see EPC ratings explained for house buyers and the worked comparison in energy cost by EPC rating.

Across the city, 2.5% of homes (1,752 of 71,151) sit in the lowest F or G bands — a small minority, concentrated in the oldest, least-adapted stock.

The cost side

For context on the purchase side, Bristol's 2025 median stood at £350,000 across 6,089 standard sales, the most expensive of the major English regional cities Homecost has mapped so far — including its own Clifton apartment market, which carries a premium over the citywide flat average despite similarly older stock.

At the £350,000 median, Stamp Duty Land Tax works out at £7,500 for a home mover, £2,500 for an eligible first-time buyer, and £25,000 where the additional-property surcharge applies (HMRC rates, 2026). Council tax is charged on top: Bristol's 2026-27 Band D is £2,713.68. On a 25% deposit and a 25-year term at the Bank of England's latest quoted 75%-LTV five-year fixed rate of 4.32% (April 2026), the mortgage on the median home works out at roughly £1,432 a month, plus £226 a month in council tax — around £1,658 a month before energy, buildings insurance or maintenance, and before any energy-efficiency gap in the property itself is factored in.

This is general information, not advice. Energy-efficiency work, mortgage costs and stamp duty all depend on individual circumstances — speak to a qualified adviser before acting.

See the numbers for a street

Homecost pulls the sold-price history, council tax, energy rating and estimated running costs for every home on a street from one postcode. Try a Bristol city-centre postcode such as BS1 1NG, or browse more area breakdowns in regional prices and the full guides library.

Based on 71,151 current Energy Performance Certificates and 6,089 Land Registry sales for the City of Bristol (2025), with 2026-27 council tax rates.