EPC rating and sold prices in BS15 (South Gloucestershire)
In postcode district BS15 (South Gloucestershire), homes rated EPC C or better sold for 8% more per square metre than D–G homes (median £3,284 vs £3,035, 8,411 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 1.8% more (95% range +1.0% to +2.7%). 2 of 5 sectors with enough sales show a difference distinguishable from zero. Data: HM Land Registry to 30 September 2026, EPC register.
From the raw gap to like-for-like
The homes are not alike: C+ homes here have a median floor area of 74 m² against 86 m² for D–G; the most common build period is 2012 onwards for C+ and 1930–1949 for D–G; 29% of C+ and 45% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +8% | — |
| Whole price, nothing held equal | −8.9% | −10.3% to −7.4% |
| Same floor area | +2.2% | +1.0% to +3.3% |
| + same property type | +6.8% | +5.7% to +7.9% |
| + same build period | +5.7% | +4.5% to +7.0% |
| + same year of sale | +1.8% | +1.0% to +2.7% |
The first row compares median prices per m²; the second compares whole prices; each later row adds one more thing that must be equal, ending with the like-for-like premium (regression of log price; build period from the certificate, 12 bands). The raw gap per m² and the whole-price gap differ because C+ and D–G homes differ in size.
Postcode sectors in BS15
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| BS15 1 | 2,312 | +12% | +1.2% | −0.5% to +2.9% |
| BS15 3 | 1,511 | +10% | +2.6% ▲ | +0.6% to +4.7% |
| BS15 4 | 1,856 | +7% | +1.6% ▲ | +0.1% to +3.1% |
| BS15 8 | 1,426 | +5% | +2.1% | −0.5% to +4.8% |
| BS15 9 | 1,306 | +3% | +1.2% | −0.7% to +3.0% |
▲ green: premium distinguishable from zero; ▼ red: discount; plain: no measurable difference. Small areas have fewer sales, so their 95% ranges are wider.
Sold prices by EPC band in BS15
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 17 | £4,661 |
| B | 847 | £3,262 |
| C | 2,136 | £3,291 |
| D | 3,932 | £3,132 |
| E | 1,276 | £2,848 |
| F | 183 | £2,786 |
| G | 20 | £2,581 |
A median is shown when a band has at least 10 sales.
How this is calculated
- Every standard sale (HM Land Registry Price Paid, category A) since January 2015 is matched to the latest energy certificate of the same address (postcode + house number or name + flat) lodged from 10 years before to 3 months after the sale; sales with no certificate or an ambiguous match are left out. Across England and Wales 92% of sales match.
- Price per m² uses the certificate's total floor area (15–1,000 m²).
- Like-for-like premium: regression of the log of price on “C or better”, log floor area, property type, the certificate's build period and the year of sale. The 95% range shows how precise the estimate is; when it includes zero, the data cannot tell the premium apart from none.
Caveats
- The band is the one on the certificate before the sale; certificates are a median 0.8 years old at the sale, but a quarter are over 4 years old and some homes were improved since.
- Condition, garden, parking, views and the exact position within the sector are not known; a premium could hide in them, or they could hide one.
- Individual sales and addresses are not shown.