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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.
| Washington Town Centre & Biddick | Sunderland | England and Wales | |
|---|---|---|---|
| Postcodes in a conservation area | 8% | 4% | 10% |
| Postcodes under an Article 4 direction | 0% | 0% | 16% |
| Listed buildings | 6 | 5 | 12 |
| Postcodes in a tree preservation order zone | 0% | 0% | 3% |
| Flats | 12% | 12% | 22% |
Grade I and II* are the most important few per cent. Listing means consent is needed for most changes, inside and out. Contains Historic England data © Historic England 2026 (via planning.data.gov.uk), OGL.
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 |
|---|---|---|---|---|
| 47, Roche Court | Extension | 2026 | +26 m² | – |
| 21, Hill Rise | Extension | 2026 | +21 m² | 5 → 6 |
| 53, Bede Crescent | Extension | 2024 | +10 m² | 4 → 4 |
| 73, Glebe Crescent | Extension | 2024 | +52 m² | 7 → 8 |
| 99, Richmond Avenue | Extension | 2024 | +41 m² | 5 → 7 |
| 17, Hambard Way | Extension | 2023 | +17 m² | – |
| 3, Cooks Wood | Extension | 2023 | +18 m² | 10 → 11 |
| Chantry House, Village Lane | Extension | 2023 | +88 m² | 9 → 9 |
| 3, Melrose | Extension | 2023 | +15 m² | 5 → 7 |
| 22, Whitby Drive | Extension | 2023 | +80 m² | 8 → 10 |
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 ↗
| Washington Town Centre & Biddick | Sunderland | England and Wales | |
|---|---|---|---|
| Rated A or B | 6% | 13% | 12% |
| Rated E, F or G | 8% | 12% | 16% |
| Homes on mains gas | 92% | 96% | 86% |
| Gas use per home (kWh a year) | 10,707 | 11,174 | 11,043 |
| Households in fuel poverty | 8% | 9% | 10% |
| Homes built before 1919 | 3% | 17% | 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 North East, 6.4% (4,384 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 Washington Town Centre & Biddick.
| Stamp duty on the new home | £2,040 |
|---|---|
| Estate agent on yours 1.2% + VAT | £2,664 |
| Solicitors, buying and selling | £3,000 |
| Survey | £600 |
| Removals | £1,500 |
| Money gone | £9,804 |
| Building, plus 15% for design, planning and contingency | £57,500 |
|---|---|
| Less what it adds to your home's value 60% of the local price | −£25,200 |
| Money gone | £32,300 |
On these figures, moving loses about £22,496 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.
| 11 The East Wing, Dame Margaret Hall, The Avenue |
|---|
| Extension |
| 2022 |
| +21 m² |
| 3 → 4 |
| 18, Spout Lane | Extension | 2022 | +40 m² | – |
|---|
| 45, Biddick Villas | Extension | 2022 | +84 m² | – |
|---|
| 36, Richmond Avenue | Extension | 2022 | +8 m² | 4 → 4 |
|---|
| 13, Maltby Close | Extension | 2021 | +20 m² | 4 → 4 |
|---|
| 15 The East Wing, Dame Margaret Hall, The Avenue | Extension | 2021 | +20 m² | – |
|---|
| 58, John F Kennedy Estate | Extension | 2021 | +84 m² | – |
|---|
| 3, Glebe Crescent | Extension | 2019 | +10 m² | 5 → 4 |
|---|
| 15, Whitby Drive | Extension | 2017 | +14 m² | 8 → 11 |
|---|
| 21, Rievaulx | Extension | 2016 | +25 m² | – |
|---|
| 49, John F Kennedy Estate | Extension | 2016 | +15 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 | 0.8% | 1.2% | 1.2% |
| Heated by a heat pump | 0.1% | 0.2% | 1.0% |
| Mains gas | 96.8% | 95.4% | 84.0% |
| Oil or LPG | 0.1% | 0.2% | 4.1% |
| Electric heating | 2.3% | 3.5% | 8.3% |
| Community heating | 0.3% | 0.5% | 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.