EPC rating and sold prices in SW13 (Richmond upon Thames)
In postcode district SW13 (Richmond upon Thames), homes rated EPC C or better sold for 4% less per square metre than D–G homes (median £9,803 vs £10,196, 2,215 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 2.9% more (95% range +0.3% to +5.6%). 0 of 3 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 118 m² against 124 m² for D–G; both groups are most often built in 1900–1929; 20% of C+ and 29% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | −4% | — |
| Whole price, nothing held equal | −7.7% | −12.8% to −2.3% |
| Same floor area | −2.1% | −4.1% to −0.1% |
| + same property type | +1.7% | −0.5% to +4.0% |
| + same build period | +3.7% | +1.2% to +6.3% |
| + same year of sale | +2.9% | +0.3% to +5.6% |
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.
Postcode sectors in SW13
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| SW13 0 | 1,152 | −3% | +0.8% | −1.9% to +3.6% |
| SW13 8 | 260 | 0% | +0.6% | −4.3% to +5.6% |
| SW13 9 | 803 | −5% | +2.9% | −2.3% to +8.4% |
▲ 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 SW13
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 11 | £10,664 |
| B | 70 | £9,739 |
| C | 662 | £9,771 |
| D | 1,034 | £10,082 |
| E | 368 | £10,636 |
| F | 60 | £10,205 |
| G | 10 | £12,204 |
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.