EPC rating and sold prices in L34 (Knowsley)
In postcode district L34 (Knowsley), homes rated EPC C or better sold for 30% more per square metre than D–G homes (median £2,336 vs £1,800, 2,869 sales). Like for like — same size, type, build period and year — the difference is −0.1% (95% range −2.5% to +2.3%): the EPC band itself is not reflected in sale prices here. 1 of 3 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 95 m² against 92 m² for D–G; the most common build period is 2012 onwards for C+ and 1930–1949 for D–G; 80% of C+ and 66% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +30% | — |
| Whole price, nothing held equal | +21.0% | +16.5% to +25.7% |
| Same floor area | +26.3% | +23.2% to +29.4% |
| + same property type | +14.0% | +11.7% to +16.4% |
| + same build period | +4.4% | +1.2% to +7.8% |
| + same year of sale | −0.1% | −2.5% to +2.3% |
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 L34
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| L34 0 | 309 | +4% | +2.6% | −2.0% to +7.5% |
| L34 1 | 838 | +30% | +5.2% | −0.1% to +10.8% |
| L34 2 | 617 | +8% | −4.1% ▼ | −8.1% to 0.0% |
| L34 3 | 272 | +57% | too few | — |
| L34 5 | 354 | +28% | too few | — |
| L34 6 | 262 | +35% | 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 L34
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 15 | £3,087 |
| B | 1,017 | £2,436 |
| C | 622 | £1,853 |
| D | 897 | £1,824 |
| E | 255 | £1,730 |
| F | 47 | £1,545 |
| G | 16 | £1,480 |
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.