EPC rating and sold prices in BN11 (Worthing)
In postcode district BN11 (Worthing), homes rated EPC C or better sold for 3% more per square metre than D–G homes (median £3,600 vs £3,481, 7,198 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 3.1% more (95% range +1.8% to +4.5%). 3 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 70 m² against 76 m² for D–G; the most common build period is 2012 onwards for C+ and before 1900 for D–G; 8% of C+ and 22% 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 | −6.6% | −8.8% to −4.3% |
| Same floor area | +3.7% | +2.4% to +5.1% |
| + same property type | +8.5% | +7.1% to +9.9% |
| + same build period | +5.0% | +3.5% to +6.4% |
| + same year of sale | +3.1% | +1.8% to +4.5% |
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 BN11
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| BN11 1 | 894 | +7% | +2.6% | −1.1% to +6.5% |
| BN11 2 | 1,764 | +7% | −1.2% | −3.6% to +1.3% |
| BN11 3 | 1,268 | +12% | +6.7% ▲ | +2.6% to +10.9% |
| BN11 4 | 1,773 | −3% | +2.9% ▲ | +0.5% to +5.4% |
| BN11 5 | 1,499 | +4% | +3.4% ▲ | +1.4% to +5.5% |
▲ 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 BN11
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 21 | £3,271 |
| B | 598 | £3,903 |
| C | 1,811 | £3,532 |
| D | 3,085 | £3,551 |
| E | 1,317 | £3,419 |
| F | 288 | £3,067 |
| G | 78 | £3,064 |
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.