EPC rating and sold prices in IP1 (Ipswich)
In postcode district IP1 (Ipswich), homes rated EPC C or better sold for 7% more per square metre than D–G homes (median £2,627 vs £2,448, 6,287 sales). Like for like — same size, type, build period and year — the difference is −0.1% (95% range −1.4% to +1.1%): the EPC band itself is not reflected in sale prices here. 2 of 5 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 80 m² against 82 m² for D–G; the most common build period is 2012 onwards for C+ and 1900–1929 for D–G; 50% of C+ and 56% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +7% | — |
| Whole price, nothing held equal | −0.2% | −2.7% to +2.2% |
| Same floor area | +6.5% | +5.0% to +8.0% |
| + same property type | +8.5% | +7.2% to +9.9% |
| + same build period | +2.1% | +0.7% to +3.6% |
| + same year of sale | −0.1% | −1.4% to +1.1% |
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 IP1
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| IP1 1 | 199 | −11% | too few | — |
| IP1 2 | 703 | +4% | +1.5% | −3.6% to +6.8% |
| IP1 3 | 639 | 0% | −2.0% | −6.6% to +2.9% |
| IP1 4 | 1,570 | +11% | +2.3% ▲ | +0.1% to +4.7% |
| IP1 5 | 1,518 | +9% | +1.9% | 0.0% to +3.9% |
| IP1 6 | 1,658 | +12% | −2.1% ▼ | −3.8% 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 IP1
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 19 | £3,636 |
| B | 646 | £2,899 |
| C | 1,546 | £2,523 |
| D | 2,834 | £2,500 |
| E | 998 | £2,357 |
| F | 193 | £2,235 |
| G | 51 | £1,967 |
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.