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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.
| Two Mile Ash | Milton Keynes | England and Wales | |
|---|---|---|---|
| Postcodes in a conservation area | 0% | 5% | 10% |
| Postcodes under an Article 4 direction | 100% | 100% | 16% |
| Listed buildings | 6 | 10 | 12 |
| Postcodes in a tree preservation order zone | 0% | 11% | 3% |
| Flats | 14% | 18% | 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 |
|---|---|---|---|---|
| 28, Clay Hill | Extension | 2026 | +10 m² | 7 → 7 |
| 23, Milesmere | Extension | 2026 | +15 m² | – |
| 3, Cherleton | Extension | 2026 | +60 m² | 3 → 5 |
| 6, Southdown Grove | Loft conversion | 2026 | – | 6 → 7 |
| 97, Downland | Extension | 2026 | +8 m² | 5 → 6 |
| 10, Thorncliffe | Extension | 2025 | +52 m² | – |
| 46, Clay Hill | Extension | 2025 | +16 m² | 4 → 4 |
| 6, Leafield Rise | Extension | 2024 | +24 m² | – |
| 23, Clay Hill | Extension | 2024 | +56 m² | 3 → 7 |
| 21, Stone Hill | Extension | 2024 | +20 m² | 9 → 9 |
| 13, Stone Hill |
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 ↗
| Two Mile Ash | Milton Keynes | England and Wales | |
|---|---|---|---|
| Rated A or B | 3% | 20% | 12% |
| Rated E, F or G | 7% | 6% | 16% |
| Homes on mains gas | 84% | 91% | 86% |
| Gas use per home (kWh a year) | 13,017 | 11,089 | 11,043 |
| Households in fuel poverty | 5% | 6% | 10% |
| Homes built before 1919 | 0% | 6% | 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 South East, 13.4% (24,181 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 Two Mile Ash.
| Stamp duty on the new home | £14,350 |
|---|---|
| Estate agent on yours 1.2% + VAT | £5,760 |
| Solicitors, buying and selling | £3,000 |
| Survey | £600 |
| Removals | £1,500 |
| Money gone | £25,210 |
| Building, plus 15% for design, planning and contingency | £57,500 |
|---|---|
| Less what it adds to your home's value 60% of the local price | −£52,200 |
| Money gone | £5,300 |
On these figures, extending loses about £19,910 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.
| Extension |
| 2024 |
| +27 m² |
| 5 → 4 |
| 12, Kepwick | Extension | 2024 | +51 m² | 4 → 7 |
|---|
| 6, Thorncliffe | Extension | 2023 | +11 m² | 5 → 6 |
|---|
| 34, Milesmere | Extension | 2023 | +13 m² | 6 → 7 |
|---|
| 1, Shorham Rise | Extension | 2023 | +51 m² | 6 → 7 |
|---|
| 14, Shorham Rise | Extension | 2023 | +54 m² | – |
|---|
| 2, Norrington | Extension | 2023 | +16 m² | – |
|---|
| 22, The High Street | Extension | 2022 | +20 m² | 7 → 7 |
|---|
| 5, Sedgemere | Extension | 2022 | +17 m² | 4 → 5 |
|---|
| 64, Leafield Rise | Extension | 2022 | +68 m² | 5 → 6 |
|---|
| 15, Calewen | Extension | 2022 | +20 m² | – |
|---|
| 132, Downland | Extension | 2022 | +52 m² | – |
|---|
| 84, Clay Hill | Extension | 2021 | +21 m² | 6 → 6 |
|---|
| 28, Shorham Rise | Extension | 2021 | +36 m² | – |
|---|
| 20a, The Approach | Extension | 2021 | +8 m² | 7 → 7 |
|---|
| 59, Shorham Rise | Extension | 2021 | +9 m² | 6 → 5 |
|---|
| 51, Chardacre | Extension | 2021 | +15 m² | 4 → 6 |
|---|
| 5, Langton Drive | Extension | 2020 | +23 m² | – |
|---|
| 5, Milesmere | Extension | 2019 | +13 m² | 8 → 7 |
|---|
| 9, Brindlebrook | Extension | 2018 | +34 m² | – |
|---|
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.
Sort by any column; open a neighbourhood for the same view.
| Neighbourhood | Council | England and Wales | |
|---|---|---|---|
| Homes with solar panels | 2.7% | 1.2% | 1.2% |
| Heated by a heat pump | 0.2% | 0.5% | 1.0% |
| Mains gas | 75.6% | 90.4% | 84.0% |
| Oil or LPG | 0.1% | 0.9% | 4.1% |
| Electric heating | 24.1% | 6.0% | 8.3% |
| Community heating | 0.0% | 1.9% | 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.