Does a C-or-better EPC sell for more in SP3 4 (Wiltshire)?
No measurable EPC premium here. In postcode sector SP3 4 (Wiltshire), comparing like with like — same floor area, property type, build period and year of sale — the difference is +3.2% (95% range −3.7% to +10.6%): the EPC band itself is not reflected in sale prices here. The raw gap is different: C+ homes sold for 1% more per square metre than D–G homes (median £3,284 vs £3,247, 524 sales 2015–2026), mostly because they are different homes. Across England and Wales the like-for-like figure is +1.2%. Data: HM Land Registry Price Paid to 30 September 2026 matched to the EPC register.
From the raw gap to like-for-like
The homes are not alike: C+ homes here have a median floor area of 92 m² against 102 m² for D–G; the most common build period is 2012 onwards for C+ and before 1900 for D–G; 67% of C+ and 83% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +1% | — |
| Whole price, nothing held equal | −9.5% | −19.8% to +2.1% |
| Same floor area | +0.9% | −3.9% to +6.1% |
| + same property type | +1.2% | −3.5% to +6.3% |
| + same build period | +2.1% | −5.1% to +9.9% |
| + same year of sale | +3.2% | −3.7% to +10.6% |
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.
Sold prices by EPC band in SP3 4
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 1 | too few |
| B | 12 | £3,251 |
| C | 65 | £3,293 |
| D | 219 | £3,307 |
| E | 154 | £3,181 |
| F | 60 | £3,131 |
| G | 13 | £2,821 |
A median is shown when a band has at least 10 sales.
C or better vs D–G, by property type
| Type | C+ sales | C+ £/m² | D–G sales | D–G £/m² |
|---|---|---|---|---|
| Detached | 39 | £3,532 | 226 | £3,397 |
| Semi-detached | 13 | £3,140 | 142 | £3,147 |
| Terraced | 16 | £3,241 | 75 | £3,023 |
| Flat / maisonette | 10 | £3,270 | 3 | — |
Compared with the wider area
| Area | Sales | Like-for-like | 95% range |
|---|---|---|---|
| Sector SP3 4 | 524 | +3.2% | −3.7% to +10.6% |
| District SP3 | 1,536 | +1.0% | −3.8% to +5.9% |
| England and Wales | 1,000,000 (sample) | +1.2% | +0.9% to +1.5% |
524 of 620 house and flat sales in the sector since 2015 (85%) were matched to a certificate.
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.