EPC rating and sold prices in BB2 (Blackburn with Darwen)
In postcode district BB2 (Blackburn with Darwen), homes rated EPC C or better sold for 45% more per square metre than D–G homes (median £2,112 vs £1,461, 9,050 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 2.4% less (95% range −4.0% to −0.8%). 0 of 6 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 92 m² against 86 m² for D–G; the most common build period is 2012 onwards for C+ and 1900–1929 for D–G; 67% of C+ and 49% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +45% | — |
| Whole price, nothing held equal | +39.1% | +35.8% to +42.5% |
| Same floor area | +32.1% | +29.8% to +34.5% |
| + same property type | +13.5% | +11.9% to +15.2% |
| + same build period | +2.5% | +0.6% to +4.4% |
| + same year of sale | −2.4% | −4.0% to −0.8% |
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 BB2
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| BB2 1 | 289 | +24% | too few | — |
| BB2 2 | 676 | 0% | −1.9% | −6.1% to +2.5% |
| BB2 3 | 1,223 | +68% | −1.1% | −4.9% to +2.8% |
| BB2 4 | 2,240 | +38% | −1.9% | −4.0% to +0.4% |
| BB2 5 | 2,104 | +26% | +1.9% | −0.9% to +4.7% |
| BB2 6 | 1,072 | +16% | +0.8% | −3.9% to +5.8% |
| BB2 7 | 1,446 | +8% | −2.5% | −5.7% to +0.8% |
▲ 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 BB2
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 96 | £2,726 |
| B | 1,450 | £2,406 |
| C | 2,091 | £1,725 |
| D | 3,991 | £1,536 |
| E | 1,132 | £1,294 |
| F | 239 | £1,102 |
| G | 51 | £893 |
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.