EPC rating and sold prices in SY23 (Ceredigion)
In postcode district SY23 (Ceredigion), homes rated EPC C or better sold for 10% more per square metre than D–G homes (median £2,265 vs £2,057, 3,422 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 6.4% more (95% range +4.1% to +8.7%). 4 of 4 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 85 m² against 96 m² for D–G; the most common build period is 2012 onwards for C+ and before 1900 for D–G; 60% of C+ and 69% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +10% | — |
| Whole price, nothing held equal | −1.1% | −3.9% to +1.7% |
| Same floor area | +7.3% | +5.2% to +9.4% |
| + same property type | +9.8% | +7.8% to +11.9% |
| + same build period | +9.6% | +6.9% to +12.3% |
| + same year of sale | +6.4% | +4.1% to +8.7% |
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 SY23
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| SY23 1 | 732 | +28% | +7.8% ▲ | +3.6% to +12.1% |
| SY23 2 | 333 | +20% | +7.3% ▲ | +0.8% to +14.2% |
| SY23 3 | 1,181 | +6% | +4.9% ▲ | +1.3% to +8.7% |
| SY23 4 | 682 | +2% | +6.3% ▲ | +0.9% to +12.1% |
| SY23 5 | 494 | +6% | too few | — |
▲ 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 SY23
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 16 | £2,412 |
| B | 288 | £2,225 |
| C | 829 | £2,273 |
| D | 1,160 | £2,154 |
| E | 764 | £2,010 |
| F | 268 | £1,813 |
| G | 97 | £1,786 |
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.