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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.
| Dagenham North | Barking and Dagenham | England and Wales | |
|---|---|---|---|
| Postcodes in a conservation area | 0% | 1% | 10% |
| Postcodes under an Article 4 direction | 100% | 100% | 16% |
| Listed buildings | 0 | 1 | 12 |
| Postcodes in a tree preservation order zone | 0% | 0% | 3% |
| Flats | 14% | 31% | 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 |
|---|---|---|---|---|
| 115, Sterry Road | Extension | 2026 | +15 m² | – |
| 445, Heathway | Extension | 2026 | +39 m² | 6 → 6 |
| 23, Holgate Road | Extension | 2026 | +51 m² | 4 → 6 |
| 72, Fanshawe Crescent | Extension | 2026 | +41 m² | – |
| 67, Hunters Square | Extension | 2026 | +18 m² | 3 → 4 |
| 3, White Gardens | Extension | 2026 | +20 m² | 4 → 5 |
| 13, Harris Road | Extension | 2026 | +17 m² | 4 → 6 |
| 65, Robinson Road | Extension | 2026 | +15 m² | – |
| 168, Reede Road | Extension | 2026 | +21 m² | 3 → 4 |
| 34, Westfield Road | Extension | 2026 | +34 m² | 3 → 4 |
| Work | Dagenham North | Barking and Dagenham | London |
|---|---|---|---|
| All householder applications | 71% (42) | – | 80% |
| Rear extension | 100% (6) | – | 79% |
| Two-storey extension | 47% (17) | – | 72% |
| Basement | – | – | 83% |
| Porch or front extension | – | – | 81% |
| Garage conversion or garage | – | – | 88% |
| Loft or dormer | – | – | 81% |
| Other householder work | – | – | 70% |
| Outbuilding or garden room | – | – | 79% |
| Side extension | – | – | 86% |
| Side return or wrap-around | – | – | 88% |
| Windows, doors or cladding | – | – | 90% |
Householder applications decided since 2023 (number decided in brackets); withdrawn ones aren't counted. GLA Planning London Datahub.
| Dagenham North | Barking and Dagenham | England and Wales | |
|---|---|---|---|
| Rated A or B | 4% | 11% | 12% |
| Rated E, F or G | 10% | 10% | 16% |
| Homes on mains gas | 99% | 84% | 86% |
| Gas use per home (kWh a year) | 9,750 | 10,368 | 11,043 |
| Households in fuel poverty | 16% | 13% | 10% |
| Homes built before 1919 | 0% | 4% | 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 London, 15.1% (15,951 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 Dagenham North.
| Stamp duty on the new home | £14,400 |
|---|---|
| Estate agent on yours 1.2% + VAT | £5,544 |
| Solicitors, buying and selling | £3,000 |
| Survey | £600 |
| Removals | £1,500 |
| Money gone | £25,044 |
| Building, plus 15% for design, planning and contingency | £57,500 |
|---|---|
| Less what it adds to your home's value 60% of the local price | −£61,800 |
| Money gone | −£4,300 |
On these figures, extending loses about £29,344 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.
| Barking East | 41.0 | 0% | 100% | 0 | 0% |
|---|---|---|---|---|---|
| Dagenham Eastbrook | 40.1 | 0% | 100% | 3 | 1% |
| Longbridge & Barking Park | 35.8 | 0% | 100% | 0 | 2% |
| Chadwell Heath East | 35.7 | 0% | 100% | 6 | 2% |
| Marks Gate | 31.7 | 0% | 100% | 5 | 4% |
| Mayesbrook Park & Rippleside | 30.9 | 0% | 100% | 1 | 5% |
| Becontree North | 28.1 | 0% | 100% | 0 | 8% |
| Gascoigne Estate & Roding Riverside | 27.8 | 2% | 100% | 2 | 55% |
| Creekmouth & Barking Riverside | 25.7 | 0% | 100% | 4 | 32% |
| Becontree Heath | 24.0 | 0% | 100% | 1 | 13% |
| Rylands Estate & Dagenham Dock | 23.6 | 0% | 100% | 1 | 6% |
| Becontree East | 22.4 | 0% | 100% | 2 | 1% |
| Dagenham North (this one) | 22.4 | 0% | 100% | 0 | 4% |
| Becontree South | 20.5 | 0% | 100% | 0 | 1% |
| Eastbrookend | 20.4 | 0% | 100% | 3 | 2% |
| Dagenham Central | 19.4 | 0% | 100% | 1 | 1% |
| Goresbrook & Scrattons Farm | 19.1 | 0% | 100% | 0 | 11% |
| Old Dagenham Park & Village | 17.8 | 2% | 100% | 4 | 6% |
| Barking Central | 17.4 | 16% | 100% | 8 | 24% |
| Becontree West | 16.8 | 0% | 100% | 0 | 20% |
| Thames View | 16.3 | 0% | 100% | 0 | 28% |
| Central Park & Frizlands Lane | 13.6 | 0% | 100% | 3 | 10% |
| Extension |
| 2026 |
| +16 m² |
| – |
| 1, Manning Road | Extension | 2026 | +20 m² | – |
|---|
| 38, Raydons Road | Extension | 2026 | +9 m² | 3 → 3 |
|---|
| 46, Naseby Road | Extension | 2026 | +10 m² | 4 → 6 |
|---|
| Flat 22, Rivington Court, St Marks Place | Extension | 2026 | +14 m² | 3 → 3 |
|---|
| 93, Connor Road | Extension | 2026 | +16 m² | 4 → 4 |
|---|
| 25, Haresfield Road | Extension | 2026 | +10 m² | 3 → 3 |
|---|
| 11, Hedgemans Road | Extension | 2026 | +22 m² | 4 → 5 |
|---|
| 91, Church Elm Lane | Extension | 2026 | +29 m² | 3 → 4 |
|---|
| 380, Heathway | Extension | 2025 | +10 m² | 3 → 4 |
|---|
| 86, Alibon Road | Extension | 2025 | +41 m² | 4 → 4 |
|---|
| 9, Sterry Crescent | Extension | 2025 | +37 m² | 3 → 5 |
|---|
| 24, Pettits Place | Extension | 2025 | +29 m² | – |
|---|
| 365, Heathway | Extension | 2025 | +31 m² | – |
|---|
| 67, Alibon Road | Extension | 2025 | +71 m² | 4 → 6 |
|---|
| 451, Heathway | Extension | 2025 | +52 m² | 4 → 6 |
|---|
| 118, Hunters Hall Road | Extension | 2025 | +40 m² | – |
|---|
| 76, Hunters Square | Extension | 2025 | +20 m² | – |
|---|
| 146, Hunters Hall Road | Extension | 2025 | +30 m² | – |
|---|
| 172, Hunters Hall Road | Extension | 2025 | +18 m² | 6 → 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.
Sort by any column; open a neighbourhood for the same view.
| Neighbourhood | Council | England and Wales | |
|---|---|---|---|
| Homes with solar panels | 1.1% | 0.9% | 1.2% |
| Heated by a heat pump | 0.0% | 0.1% | 1.0% |
| Mains gas | 97.7% | 86.5% | 84.0% |
| Oil or LPG | 0.1% | 0.1% | 4.1% |
| Electric heating | 2.1% | 7.3% | 8.3% |
| Community heating | 0.1% | 6.1% | 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.