EPC rating and sold prices in TN10 (Tonbridge and Malling)
In postcode district TN10 (Tonbridge and Malling), homes rated EPC C or better sold for 1% more per square metre than D–G homes (median £4,527 vs £4,470, 2,063 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 3.2% more (95% range +1.3% to +5.0%). 2 of 2 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 99 m² against 90 m² for D–G; both groups are most often built in 1950–1966; 69% of C+ and 85% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +1% | — |
| Whole price, nothing held equal | +6.0% | +1.4% to +10.7% |
| Same floor area | −1.1% | −4.0% to +1.8% |
| + same property type | +4.6% | +2.3% to +7.1% |
| + same build period | +6.0% | +3.8% to +8.1% |
| + same year of sale | +3.2% | +1.3% to +5.0% |
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 TN10
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| TN10 3 | 956 | +5% | +3.6% ▲ | +0.8% to +6.6% |
| TN10 4 | 1,107 | 0% | +3.0% ▲ | +0.6% to +5.4% |
▲ 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 TN10
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 3 | too few |
| B | 92 | £5,129 |
| C | 512 | £4,461 |
| D | 1,151 | £4,526 |
| E | 258 | £4,292 |
| F | 39 | £3,893 |
| G | 8 | too few |
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.