EPC rating and sold prices in N7 (Islington)
In postcode district N7 (Islington), homes rated EPC C or better sold for 5% more per square metre than D–G homes (median £8,367 vs £8,001, 3,638 sales). Like for like — same size, type, build period and year — the difference is +1.1% (95% range −0.8% to +3.0%): the EPC band itself is not reflected in sale prices here. 2 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 66 m² against 76 m² for D–G; the most common build period is 2012 onwards for C+ and 1900–1929 for D–G; 1% of C+ and 4% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +5% | — |
| Whole price, nothing held equal | −19.8% | −22.4% to −17.1% |
| Same floor area | −1.7% | −3.5% to +0.1% |
| + same property type | 0.0% | −1.8% to +1.8% |
| + same build period | +2.3% | +0.4% to +4.2% |
| + same year of sale | +1.1% | −0.8% 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 N7
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| N7 0 | 963 | +4% | +3.8% ▲ | +0.5% to +7.3% |
| N7 6 | 564 | +1% | −0.9% | −4.7% to +3.1% |
| N7 7 | 579 | +17% | +3.3% | −3.0% to +10.0% |
| N7 8 | 639 | −4% | −0.7% | −5.9% to +4.7% |
| N7 9 | 893 | +9% | −4.6% ▼ | −8.3% 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 N7
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 15 | £7,465 |
| B | 967 | £8,723 |
| C | 1,259 | £7,945 |
| D | 1,043 | £8,015 |
| E | 307 | £7,979 |
| F | 35 | £7,944 |
| G | 12 | £8,646 |
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.