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What can I build, and will it pay? The planning rules, what neighbours have built, planning decisions, energy upgrades, and whether extending pays.
| Cotmanhay | Erewash | England and Wales | |
|---|---|---|---|
| Postcodes in a conservation area | 0% | 7% | 10% |
| Postcodes under an Article 4 direction | 0% | 0% | 16% |
| Listed buildings | 0 | 12 | 12 |
| Postcodes in a tree preservation order zone | 0% | 0% | 3% |
| Flats | 9% | 8% | 22% |
planning.data.gov.uk (OGL), Historic England. The rules at one address are on its postcode's Improving page. General guidance, not planning advice.
| Home | Work | Seen | Space added | Rooms |
|---|---|---|---|---|
| 2, Henshaw Place | Extension | 2026 | +28 m² | 5 → 6 |
| 7, Trueman Street | Extension | 2026 | +22 m² | – |
| 1, Primrose Street | Extension | 2026 | +28 m² | – |
| 187, Church Street | Extension | 2026 | +41 m² | – |
| 254, Heanor Road | Extension | 2026 | +35 m² | 3 → 4 |
| 174, Heanor Road | Extension | 2026 | +24 m² | – |
| 82, Norman Street | Loft conversion | 2025 | – | 7 → 3 |
| 57, Duke Street | Extension | 2025 | +8 m² | 3 → 4 |
| 6, Ash Street | Extension | 2024 | +9 m² | 4 → 6 |
| 244, Cotmanhay Road | Extension | 2024 | +17 m² | – |
| 311, Cotmanhay Road |
Planning applications outside London aren't published as open data yet, so search the council's own register: the drawings, the decision and the agent are there. Find the council's planning register on GOV.UK ↗
| Cotmanhay | Erewash | England and Wales | |
|---|---|---|---|
| Rated A or B | 3% | 5% | 12% |
| Rated E, F or G | 18% | 20% | 16% |
| Homes on mains gas | 97% | 96% | 86% |
| Gas use per home (kWh a year) | 9,492 | 10,554 | 11,043 |
| Households in fuel poverty | 13% | 10% | 10% |
| Homes built before 1919 | 22% | 20% | 20% |
A home's own recommended upgrades and their costs are on its energy certificate, shown on its page.
MHCLG energy certificates; DESNZ fuel poverty.
Across England and Wales, homes extended by a typical 30 m² and then resold rose about 11.1% more than similar homes nearby over the same years (124,884 resales); in East Midlands, 9.4% (9,562 resales).
Rough build costs and resale evidence, not quotes or a valuation. How extensions pay off by size, type and region.
The money you don't get back either way, for the same extra space in Cotmanhay.
| Stamp duty on the new home | £1,280 |
|---|---|
| Estate agent on yours 1.2% + VAT | £2,160 |
| Solicitors, buying and selling | £3,000 |
| Survey | £600 |
| Removals | £1,500 |
| Money gone | £8,540 |
| Building, plus 15% for design, planning and contingency | £57,500 |
|---|---|
| Less what it adds to your home's value 60% of the local price | −£23,400 |
| Money gone | £34,100 |
On these figures, moving loses about £25,560 less. Moving also changes the area, the schools and the commute; extending means months of building work and depends on planning.
Building costs vary a lot (a single-storey rear extension is often £2,000–£3,000 per m², more in London). How much space adds depends on the home and street: what extensions added to resale prices. A guide, not advice; nothing you type leaves this page.
Where people extend most, and where the planning rules are tighter.
| Breadsall, Little Eaton & Stanley Common | 26.8 | 4% | 0% | 45 | 6% |
|---|---|---|---|---|---|
| Borrowash & Ockbrook | 23.7 | 5% | 0% | 35 | 5% |
| West Hallam | 22.6 | 8% | 0% | 28 | 4% |
| Long Eaton West | 21.8 | 2% | 0% | 3 | 3% |
| Breaston & Draycott | 21.3 | 13% | 0% | 23 | 4% |
| Long Eaton North | 19.7 | 1% | 0% | 14 | 3% |
| Long Eaton Town | 18.9 | 26% | 0% | 12 | 5% |
| Sandiacre & Stanton | 18.8 | 10% | 0% | 38 | 4% |
| Sawley | 16.6 | 2% | 0% | 6 | 5% |
| Hallam Fields & Greenwood Ave | 16.5 | 0% | 0% | 6 | 16% |
| Long Eaton South | 13.7 | 0% | 0% | 4 | 4% |
| Shipley | 13.2 | 0% | 0% | 1 | 6% |
| Ilkeston Town | 11.1 | 25% | 0% | 19 | 5% |
| Cotmanhay (this one) | 5.5 | 0% | 0% | 0 | 3% |
| Kirk Hallam | 2.9 | 0% | 0% | 1 | 5% |
Sort by any column; open a neighbourhood for the same view.
| Extension |
| 2024 |
| +8 m² |
| 5 → 5 |
| 3, Norman Crescent | Extension | 2024 | +11 m² | 5 → 5 |
|---|
| 55, Beatty Walk | Extension | 2024 | +26 m² | – |
|---|
| 12, Wesley Street | Extension | 2023 | +20 m² | – |
|---|
| 47, Richmond Avenue | Extension | 2023 | +24 m² | 5 → 4 |
|---|
| 25, Rossendale | Loft conversion | 2023 | – | 6 → 6 |
|---|
| 154, Heanor Road | Extension | 2023 | +19 m² | 6 → 5 |
|---|
| 4, The Vale | Extension | 2023 | +40 m² | 7 → 5 |
|---|
| 128, Cotmanhay Road | Loft conversion | 2022 | – | – |
|---|
| 3, May Street | Extension | 2022 | +22 m² | – |
|---|
| 124, Heanor Road | Extension | 2022 | +19 m² | 5 → 5 |
|---|
| 21, Vernon Street | Extension | 2021 | +51 m² | 3 → 5 |
|---|
| 7, Beresford Drive | Extension | 2021 | +21 m² | – |
|---|
| 23, Grass Street | Extension | 2021 | +10 m² | 5 → 5 |
|---|
| 9, Dukes Place | Extension | 2020 | +44 m² | – |
|---|
| 127, Cotmanhay Road | Loft conversion | 2020 | +58 m² | – |
|---|
| 58, Bridge Street | Extension | 2020 | +20 m² | 4 → 5 |
|---|
| 2, Meridian Close | Extension | 2020 | +27 m² | 4 → 6 |
|---|
| 55, Archer Street | Extension | 2020 | +16 m² | – |
|---|
| 20, Oakham Way | Extension | 2020 | +8 m² | 3 → 5 |
|---|
Not every extension shows here. We only see building work when a new energy certificate is lodged, which happens when a home is sold, let or newly built. A loft or extension added since then won't appear, even with planning permission and building control sign-off, because those records aren't published as open data outside London. Missing work doesn't mean missing paperwork.
From energy certificates: an extension where a later certificate shows more floor space, a loft conversion where roof rooms appear.
| Neighbourhood | Council | England and Wales | |
|---|---|---|---|
| Homes with solar panels | 0.7% | 1.2% | 1.2% |
| Heated by a heat pump | 0.0% | 0.2% | 1.0% |
| Mains gas | 97.8% | 93.9% | 84.0% |
| Oil or LPG | 0.2% | 0.4% | 4.1% |
| Electric heating | 2.0% | 5.0% | 8.3% |
| Community heating | 0.0% | 0.1% | 2.1% |
From each home's latest energy certificate, so panels or heat pumps fitted since aren't counted and the shares are lower than today's real figures. Compare areas in the data explorer.