EPC rating and sold prices in SO31 (Fareham)
In postcode district SO31 (Fareham), homes rated EPC C or better sold for 1% less per square metre than D–G homes (median £3,636 vs £3,670, 9,488 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 1.4% less (95% range −2.4% to −0.5%). 6 of 7 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 90 m² against 92 m² for D–G; the most common build period is 2012 onwards for C+ and 1983–1990 for D–G; 57% 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) | −1% | — |
| Whole price, nothing held equal | −4.1% | −6.0% to −2.3% |
| Same floor area | −2.0% | −2.9% to −1.0% |
| + same property type | +2.8% | +1.9% to +3.8% |
| + same build period | +2.2% | +1.1% to +3.3% |
| + same year of sale | −1.4% | −2.4% to −0.5% |
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 SO31
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| SO31 1 | 604 | −10% | −5.7% ▼ | −10.4% to −0.8% |
| SO31 4 | 900 | +2% | +3.1% ▲ | +0.1% to +6.3% |
| SO31 5 | 1,171 | +2% | −3.0% ▼ | −5.0% to −1.0% |
| SO31 6 | 2,374 | −4% | −0.7% | −2.4% to +1.0% |
| SO31 7 | 1,586 | +5% | −5.8% ▼ | −8.3% to −3.3% |
| SO31 8 | 1,609 | +3% | +3.2% ▲ | +0.7% to +5.7% |
| SO31 9 | 1,244 | +8% | −2.9% ▼ | −5.4% to −0.3% |
▲ 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 SO31
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 147 | £4,077 |
| B | 2,167 | £3,614 |
| C | 2,997 | £3,646 |
| D | 3,362 | £3,668 |
| E | 687 | £3,689 |
| F | 101 | £3,837 |
| G | 27 | £3,231 |
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.