EPC rating and sold prices in OX4 (Oxford)
In postcode district OX4 (Oxford), homes rated EPC C or better sold for 4% less per square metre than D–G homes (median £4,565 vs £4,745, 5,865 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 2.2% more (95% range +0.8% to +3.7%). 3 of 6 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 83 m² for D–G; the most common build period is 1996–2002 for C+ and 1930–1949 for D–G; 27% of C+ and 41% 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 | −14.8% | −16.6% to −13.1% |
| Same floor area | −6.9% | −8.3% to −5.5% |
| + same property type | −3.9% | −5.2% to −2.5% |
| + same build period | +4.9% | +3.4% to +6.4% |
| + same year of sale | +2.2% | +0.8% to +3.7% |
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 OX4
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| OX4 1 | 997 | +5% | +3.9% ▲ | +0.2% to +7.7% |
| OX4 2 | 1,148 | +4% | +1.7% | −1.1% to +4.5% |
| OX4 3 | 1,507 | −1% | +3.3% ▲ | +1.2% to +5.5% |
| OX4 4 | 1,357 | −2% | +5.6% ▲ | +2.4% to +8.8% |
| OX4 6 | 459 | +3% | +1.6% | −0.8% to +4.1% |
| OX4 7 | 397 | +1% | −1.0% | −4.5% to +2.6% |
▲ 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 OX4
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 19 | £4,286 |
| B | 398 | £3,985 |
| C | 1,917 | £4,653 |
| D | 2,602 | £4,740 |
| E | 781 | £4,797 |
| F | 122 | £4,516 |
| G | 26 | £4,684 |
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.