EPC rating and sold prices in HA5 (Harrow)
In postcode district HA5 (Harrow), homes rated EPC C or better sold for 7% less per square metre than D–G homes (median £5,813 vs £6,261, 5,445 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 1.9% less (95% range −3.2% to −0.6%). 0 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 82 m² against 105 m² for D–G; both groups are most often built in 1930–1949; 34% of C+ and 71% 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 | −21.6% | −24.0% to −19.2% |
| Same floor area | −9.8% | −11.0% to −8.4% |
| + same property type | −1.3% | −2.5% to +0.1% |
| + same build period | +0.6% | −0.7% to +2.0% |
| + same year of sale | −1.9% | −3.2% to −0.6% |
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 HA5
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| HA5 1 | 997 | −8% | −1.6% | −4.8% to +1.7% |
| HA5 2 | 1,212 | −6% | −0.6% | −2.8% to +1.6% |
| HA5 3 | 1,338 | −11% | −0.9% | −3.9% to +2.2% |
| HA5 4 | 1,009 | −9% | −2.3% | −5.1% to +0.6% |
| HA5 5 | 889 | +1% | +2.6% | −0.5% to +5.8% |
▲ 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 HA5
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 1 | too few |
| B | 212 | £5,646 |
| C | 1,267 | £5,829 |
| D | 2,555 | £6,250 |
| E | 1,186 | £6,308 |
| F | 192 | £6,224 |
| G | 32 | £6,018 |
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.