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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.
| Bromley South | Bromley | England and Wales | |
|---|---|---|---|
| Postcodes in a conservation area | 18% | 9% | 10% |
| Postcodes under an Article 4 direction | 0% | 0% | 16% |
| Listed buildings | 14 | 5 | 12 |
| Postcodes in a tree preservation order zone | 0% | 0% | 3% |
| Flats | 46% | 30% | 22% |
| Building | Grade | Distance |
|---|---|---|
| Former St Mark'S School | II | 260 m |
| Victorian Folly of 'Medieval Ruins' in Bromley Palace Park | II | 470 m |
| 19, Glassmill Lane | II | 480 m |
| Church of St Peter and St Paul | II* | 560 m |
| Bromley (St Peter and St Paul's) War Memorial | II | 570 m |
| the Old Palace | II | 590 m |
| Bromley War Memorial, St Martin'S Hill | II* | 600 m |
| 180-184, High Street | II | 600 m |
| Pulhamite Waterfall in Bromley Palace Park | II | 610 m |
| National Westminster Bank | II | 620 m |
| 171, 173, 175 (Royal Bell Hotel) and 177, High Street | II | 650 m |
| 179, High Street | II | 660 m |
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 |
|---|---|---|---|---|
| Flat 2, 53, Ravensbourne Road | Extension | 2026 | +8 m² | 2 → 2 |
| 26, Aylesbury Road | Extension | 2026 | +8 m² | 4 → 3 |
| 49, Queen Anne Avenue | Extension | 2026 | +23 m² | 7 → 7 |
| 76, Queen Anne Avenue | Extension | 2026 | +47 m² | 5 → 6 |
| 11, New Farm Avenue | Extension | 2026 | +16 m² | – |
| 25, Rafford Way | Extension | 2026 | +73 m² | 5 → 7 |
| 33, Rafford Way | Extension | 2026 | +46 m² | 5 → 6 |
| 1, Cameron Road | Extension | 2026 | +30 m² | 5 → 7 |
| 166, Queen Anne Avenue | Extension | 2026 | +55 m² | 5 → 5 |
| 15, Bromley Gardens | Extension | 2026 | +10 m² | 4 → 5 |
| Work | Bromley South | Bromley | London |
|---|---|---|---|
| All householder applications | 77% (88) | 79% (3770) | 80% |
| Basement | – | 77% (26) | 83% |
| Porch or front extension | – | 92% (94) | 81% |
| Garage conversion or garage | – | 85% (123) | 88% |
| Loft or dormer | 66% (32) | 73% (1144) | 81% |
| Other householder work | 20% (5) | 54% (294) | 70% |
| Outbuilding or garden room | – | 83% (107) | 79% |
| Rear extension | 90% (19) | 89% (1056) | 79% |
| Side extension | – | 93% (144) | 86% |
| Side return or wrap-around | 90% (10) | 94% (154) | 88% |
| Two-storey extension | 83% (12) | 70% (543) | 72% |
| Windows, doors or cladding | – | 85% (85) | 90% |
Householder applications decided since 2023 (number decided in brackets); withdrawn ones aren't counted. GLA Planning London Datahub.
| Bromley South | Bromley | England and Wales | |
|---|---|---|---|
| Rated A or B | 16% | 8% | 12% |
| Rated E, F or G | 16% | 20% | 16% |
| Homes on mains gas | 83% | 93% | 86% |
| Gas use per home (kWh a year) | 13,264 | 13,468 | 11,043 |
| Households in fuel poverty | 8% | 8% | 10% |
| Homes built before 1919 | 24% | 16% | 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 Bromley South.
| Stamp duty on the new home | £19,000 |
|---|---|
| Estate agent on yours 1.2% + VAT | £6,768 |
| Solicitors, buying and selling | £3,000 |
| Survey | £600 |
| Removals | £1,500 |
| Money gone | £30,868 |
| Building, plus 15% for design, planning and contingency | £57,500 |
|---|---|
| Less what it adds to your home's value 60% of the local price | −£66,000 |
| Money gone | −£8,500 |
On these figures, extending loses about £39,368 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.
Nearest 12 shown. 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.
| 41, Bromley Gardens |
|---|
| Extension |
| 2026 |
| +38 m² |
| – |
| 38, The Chase | Extension | 2026 | +70 m² | 5 → 7 |
|---|
| 126, Durham Road | Extension | 2026 | +29 m² | – |
|---|
| 19, Ravensbourne Road | Extension | 2025 | +16 m² | 6 → 6 |
|---|
| 88, Newbury Road | Extension | 2025 | +31 m² | – |
|---|
| 88, Newbury Road | Loft conversion | 2025 | +31 m² | 4 → 6 |
|---|
| 69, Newbury Road | Extension | 2025 | +26 m² | – |
|---|
| 63, Ravensbourne Road | Extension | 2025 | +30 m² | – |
|---|
| 4, Forstal Close | Extension | 2025 | +20 m² | 4 → 7 |
|---|
| 83, Ridley Road | Extension | 2025 | +17 m² | – |
|---|
| Flat 3, Mayfield Court, 56, Westmoreland Road | Extension | 2025 | +21 m² | – |
|---|
| 11, Tavistock Road | Extension | 2025 | +19 m² | – |
|---|
| 27, Bromley Crescent | Extension | 2025 | +27 m² | 6 → 8 |
|---|
| 27, Bromley Crescent | Loft conversion | 2025 | +27 m² | 6 → 8 |
|---|
| Flat 36, Florida Court, 76, Westmoreland Road | Extension | 2025 | +10 m² | 4 → 4 |
|---|
| Poplars, 4a, Lancaster Close | Extension | 2025 | +39 m² | – |
|---|
| 13, Lancaster Close | Extension | 2025 | +98 m² | – |
|---|
| 55, Glanville Road | Extension | 2025 | +56 m² | 5 → 6 |
|---|
| 23, Highfield Drive | Extension | 2025 | +82 m² | 8 → 7 |
|---|
| 74, Newbury Road | Extension | 2024 | +22 m² | 5 → 6 |
|---|
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 | 0.5% | 0.7% | 1.2% |
| Heated by a heat pump | 0.6% | 0.4% | 1.0% |
| Mains gas | 79.3% | 90.9% | 84.0% |
| Oil or LPG | 0.1% | 0.2% | 4.1% |
| Electric heating | 8.4% | 6.3% | 8.3% |
| Community heating | 11.6% | 2.1% | 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.