EPC rating and sold prices in WA15 (Trafford)
In postcode district WA15 (Trafford), homes rated EPC C or better sold for 6% less per square metre than D–G homes (median £3,869 vs £4,131, 7,098 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 3.1% less (95% range −4.5% to −1.7%). 3 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 95 m² against 102 m² for D–G; both groups are most often built in 1930–1949; 54% of C+ and 74% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | −6% | — |
| Whole price, nothing held equal | −14.5% | −17.3% to −11.5% |
| Same floor area | −7.1% | −8.5% to −5.6% |
| + same property type | −0.2% | −1.7% to +1.4% |
| + same build period | +4.4% | +2.6% to +6.2% |
| + same year of sale | −3.1% | −4.5% to −1.7% |
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 WA15
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| WA15 0 | 688 | +1% | −8.5% ▼ | −13.7% to −3.1% |
| WA15 6 | 2,009 | +4% | +1.8% | −0.1% to +3.8% |
| WA15 7 | 1,645 | −10% | +0.4% | −2.1% to +2.9% |
| WA15 8 | 1,532 | −7% | −2.9% ▼ | −5.3% to −0.4% |
| WA15 9 | 1,224 | −1% | −6.2% ▼ | −10.0% to −2.2% |
▲ 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 WA15
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 5 | too few |
| B | 307 | £3,556 |
| C | 1,774 | £3,932 |
| D | 3,545 | £4,156 |
| E | 1,223 | £4,078 |
| F | 210 | £4,110 |
| G | 34 | £4,041 |
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.