EPC rating and sold prices in SS1 (Southend-on-Sea)
In postcode district SS1 (Southend-on-Sea), homes rated EPC C or better sold for 3% less per square metre than D–G homes (median £3,393 vs £3,482, 4,476 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 4.4% more (95% range +2.3% to +6.6%). 2 of 3 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 63 m² against 100 m² for D–G; the most common build period is 2003–2006 for C+ and 1900–1929 for D–G; 14% of C+ and 51% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | −3% | — |
| Whole price, nothing held equal | −32.0% | −34.5% to −29.3% |
| Same floor area | +1.1% | −1.0% to +3.1% |
| + same property type | +8.7% | +6.6% to +10.8% |
| + same build period | +9.2% | +6.9% to +11.7% |
| + same year of sale | +4.4% | +2.3% to +6.6% |
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 SS1
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| SS1 1 | 590 | +9% | +10.5% ▲ | +4.2% to +17.3% |
| SS1 2 | 2,165 | +1% | +2.9% ▲ | +0.1% to +5.8% |
| SS1 3 | 1,721 | −7% | −0.5% | −3.2% to +2.4% |
▲ 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 SS1
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| B | 205 | £3,375 |
| C | 990 | £3,395 |
| D | 2,013 | £3,482 |
| E | 1,007 | £3,464 |
| F | 231 | £3,774 |
| G | 30 | £3,108 |
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.