EPC rating and sold prices in NP19 (Newport)
In postcode district NP19 (Newport), homes rated EPC C or better sold for 30% more per square metre than D–G homes (median £2,267 vs £1,742, 10,052 sales). Like for like — same size, type, build period and year — homes rated C or better sold for 2.1% more (95% range +0.8% to +3.4%). 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 83 m² against 86 m² for D–G; the most common build period is 2012 onwards for C+ and 1900–1929 for D–G; 49% of C+ and 40% of D–G sales are detached or semi-detached houses.
| Comparing C+ with D–G homes… | Difference | 95% range |
|---|---|---|
| Raw gap per m² (medians) | +30% | — |
| Whole price, nothing held equal | +21.7% | +19.8% to +23.6% |
| Same floor area | +29.0% | +27.4% to +30.6% |
| + same property type | +24.0% | +22.6% to +25.5% |
| + same build period | +9.5% | +7.7% to +11.3% |
| + same year of sale | +2.1% | +0.8% to +3.4% |
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 NP19
| Sector | Sales | Raw gap | Like-for-like | 95% range |
|---|---|---|---|---|
| NP19 0 | 2,025 | +30% | +4.5% ▲ | +1.7% to +7.4% |
| NP19 4 | 2,772 | +26% | +0.4% | −3.8% to +4.9% |
| NP19 7 | 2,144 | +22% | +1.8% | −0.5% to +4.2% |
| NP19 8 | 1,557 | +15% | +5.7% ▲ | +2.8% to +8.7% |
| NP19 9 | 1,554 | +9% | +2.0% | −0.3% to +4.3% |
▲ 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 NP19
| EPC band (last certificate before sale) | Sales | Median £ per m² |
|---|---|---|
| A | 32 | £3,399 |
| B | 2,574 | £2,500 |
| C | 2,276 | £2,048 |
| D | 3,862 | £1,795 |
| E | 1,135 | £1,575 |
| F | 137 | £1,468 |
| G | 36 | £1,236 |
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.