EPC rating and sold prices in SR7 (County Durham)
In postcode district SR7 (County Durham), homes rated EPC C or better sold for 51% more per square metre than D–G homes (median £1,769 vs £1,169, 4,437 sales). Like for like — same size, type, build period and year — the difference is +2.2% (95% range −0.4% to +4.9%): the EPC band itself is not reflected in sale prices here. 1 of 4 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 81 m² against 82 m² for D–G; the most common build period is 2003–2006 for C+ and 1900–1929 for D–G; 60% of C+ and 44% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +51% | — |
| Whole price, nothing held equal | +49.1% | +44.2% to +54.1% |
| Same floor area | +43.5% | +39.7% to +47.4% |
| + same property type | +28.7% | +25.7% to +31.9% |
| + same build period | +6.6% | +3.8% to +9.6% |
| + same year of sale | +2.2% | −0.4% to +4.9% |
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 SR7
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| SR7 0 | 857 | +16% | +3.5% | −0.8% to +8.0% |
| SR7 7 | 1,634 | +99% | +0.2% | −4.5% to +5.1% |
| SR7 8 | 986 | +59% | +2.2% | −2.3% to +6.9% |
| SR7 9 | 960 | +42% | +7.7% ▲ | +2.0% to +13.7% |
▲ 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 SR7
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 32 | £2,552 |
| B | 398 | £2,000 |
| C | 1,596 | £1,684 |
| D | 1,883 | £1,218 |
| E | 464 | £1,033 |
| F | 56 | £903 |
| G | 8 | too few |
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.