EPC rating and sold prices in SW19 (Merton)
In postcode district SW19 (Merton), homes rated EPC C or better sold for 6% less per square metre than D–G homes (median £7,525 vs £7,979, 11,081 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 1.8% less (95% range −2.8% to −0.8%). 1 of 8 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 93 m² for D–G; both groups are most often built in 1900–1929; 9% of C+ and 23% 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 | −19.6% | −21.5% to −17.6% |
| Same floor area | −5.6% | −6.6% to −4.7% |
| + same property type | −1.7% | −2.7% to −0.8% |
| + same build period | −0.5% | −1.5% to +0.5% |
| + same year of sale | −1.8% | −2.8% to −0.8% |
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 SW19
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| SW19 1 | 1,830 | −5% | +0.8% | −0.9% to +2.7% |
| SW19 2 | 1,705 | 0% | +2.6% ▲ | +0.7% to +4.6% |
| SW19 3 | 1,576 | −1% | −0.7% | −3.3% to +1.9% |
| SW19 4 | 945 | −14% | −3.0% | −6.2% to +0.2% |
| SW19 5 | 627 | −19% | −4.8% | −10.0% to +0.6% |
| SW19 6 | 1,325 | +6% | +0.6% | −1.6% to +2.8% |
| SW19 7 | 851 | −3% | −2.3% | −5.5% to +0.9% |
| SW19 8 | 2,222 | −6% | 0.0% | −1.8% to +1.8% |
▲ 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 SW19
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 18 | £8,175 |
| B | 806 | £7,748 |
| C | 3,875 | £7,474 |
| D | 4,585 | £7,911 |
| E | 1,475 | £8,154 |
| F | 257 | £8,632 |
| G | 65 | £7,838 |
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.