EPC rating and sold prices in HA8 (Barnet)
In postcode district HA8 (Barnet), homes rated EPC C or better sold for 4% less per square metre than D–G homes (median £5,317 vs £5,544, 5,059 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 1.5% more (95% range +0.1% to +3.0%). 3 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 76 m² against 91 m² for D–G; the most common build period is 2012 onwards for C+ and 1930–1949 for D–G; 18% of C+ and 58% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | −4% | — |
| Whole price, nothing held equal | −16.9% | −18.9% to −14.9% |
| Same floor area | −5.1% | −6.4% to −3.8% |
| + same property type | +4.7% | +3.3% to +6.1% |
| + same build period | +3.4% | +1.9% to +5.0% |
| + same year of sale | +1.5% | +0.1% to +3.0% |
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 HA8
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| HA8 0 | 585 | +2% | +3.4% | 0.0% to +7.0% |
| HA8 5 | 798 | −12% | +1.9% | −3.1% to +7.1% |
| HA8 6 | 658 | −3% | −3.5% | −7.3% to +0.5% |
| HA8 7 | 488 | +1% | +5.9% ▲ | +0.4% to +11.7% |
| HA8 8 | 1,544 | −3% | +2.7% ▲ | +0.3% to +5.2% |
| HA8 9 | 986 | −1% | +2.6% ▲ | +0.1% to +5.1% |
▲ 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 HA8
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 56 | £6,373 |
| B | 709 | £5,115 |
| C | 1,285 | £5,421 |
| D | 2,166 | £5,549 |
| E | 723 | £5,529 |
| F | 97 | £5,368 |
| G | 23 | £5,769 |
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.