EPC rating and sold prices in L35 (Knowsley)
In postcode district L35 (Knowsley), homes rated EPC C or better sold for 25% more per square metre than D–G homes (median £2,278 vs £1,827, 4,325 sales). Like for like — same size, type, build period and year — the difference is +0.4% (95% range −1.3% to +2.2%): the EPC band itself is not reflected in sale prices here. 1 of 9 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 88 m² against 83 m² for D–G; the most common build period is 2012 onwards for C+ and 1950–1966 for D–G; 73% 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) | +25% | — |
| Whole price, nothing held equal | +21.9% | +18.6% to +25.4% |
| Same floor area | +17.3% | +14.9% to +19.8% |
| + same property type | +13.1% | +11.1% to +15.2% |
| + same build period | +7.0% | +4.8% to +9.3% |
| + same year of sale | +0.4% | −1.3% to +2.2% |
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 L35
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| L35 0 | 409 | +4% | +2.9% | −2.6% to +8.7% |
| L35 1 | 378 | +53% | +2.1% | −4.3% to +9.1% |
| L35 2 | 220 | +16% | +7.8% ▲ | +1.8% to +14.1% |
| L35 3 | 946 | +13% | +1.1% | −1.9% to +4.3% |
| L35 4 | 406 | 0% | +1.2% | −3.9% to +6.5% |
| L35 5 | 489 | −1% | +1.4% | −3.2% to +6.3% |
| L35 6 | 199 | 0% | too few | — |
| L35 7 | 611 | +23% | +3.4% | −0.4% to +7.4% |
| L35 8 | 404 | +13% | +2.5% | −2.7% to +7.9% |
| L35 9 | 263 | +23% | +3.7% | −2.9% to +10.8% |
▲ 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 L35
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 27 | £3,154 |
| B | 648 | £2,574 |
| C | 1,196 | £1,964 |
| D | 1,858 | £1,875 |
| E | 478 | £1,693 |
| F | 92 | £1,668 |
| G | 26 | £1,482 |
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.