What you could build at BR2 9PB: the planning rules at this address, what neighbours have built and how big, planning decisions nearby, rough costs and the value an extension adds, and how to get started. In Bickley West, Bromley.
105extensions seen within 600 m in the last 10 years
6loft conversions within 600 m in the last 10 years
95.3extensions per 1,000 homes in the neighbourhood (10 years)
● work seen on energy certificates · ● application approved · ● refused · ● pending or other · ● this postcode
The rules at this address
Houses usually have permitted development rights: some rear extensions (typically up to 3 m deep for a semi or terrace, 4 m detached), loft conversions within volume limits, and porches can go ahead without planning permission. Larger single-storey rear extensions (up to 6 m / 8 m) can use the “prior approval” neighbour scheme.
Not in a conservation area (from council registers).
No Article 4 direction recorded for this postcode.
Listed buildings need listed building consent for most changes, inside and out: check the National Heritage List.
To be certain work is permitted development, apply for a lawful development certificate (about £129 for householders in England). Building regulations apply either way.
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). How extensions pay off by size, type and region.
Single-storey rear or side extension: about £2,000–£3,000 per m² (London £2,500–£4,000), plus fees and VAT
Loft conversion: about £45,000–£75,000 for a dormer; more for a mansard or hip-to-gable
Two-storey extension: about £1,800–£2,800 per m² of new floor
Garage conversion: about £15,000–£30,000
Basement: about £3,500–£5,000 per m², London mostly
Build costs are rough 2026 ranges from industry guides, not quotes. Get three quotes for your plans.
Move or improve?
The money you don't get back either way, for the same extra space in Bickley West.
Move to a home 20 m² bigger (about £659,000)
Stamp duty on the new home
£22,950
Estate agent on yours 1.2% + VAT
£7,776
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£35,826
Extend by 20 m²
Building, plus 15% for design, planning and contingency
£57,500
Less what it adds to your home's value 60% of the local price
−£71,400
Money gone
−£13,900
On these figures, extending loses about £49,726 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.
Getting started
Look at what neighbours did. Open applications above to see drawings that were approved on similar houses, and who designed them.
Check the route: permitted development (with a lawful development certificate), prior approval for larger rear extensions, or full householder planning permission.
Get a measured survey and a designer: an architect, an architectural technologist or a designer who handles planning drawings.
Apply (householder permission is about £258 in England; councils aim to decide within 8 weeks).
Building regulations through the council's building control or an approved inspector, and party wall notices to neighbours if you build on or near the boundary.
Choose a builder: written quotes, a contract, staged payments, and check their insurance and references.
From energy certificates: an extension where a later certificate shows more floor space, a loft conversion where roof rooms appear. Certificates come with sales, lettings and some building work, so the year is when it was first seen.
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.
23, Cowper Road, Br2 9rt
Rear extension
Under consideration
–
25/01645/FULL6
21, Beaconsfield Road, Br1 2bl
Outbuilding or garden room
Under consideration
–
25/01340/FULL6
63, Southlands Road, Br2 9qr
Side return or wrap-around
Under consideration
–
25/01441/FULL6
154, Southlands Road, Br2 9qy
Two-storey extension
Under consideration
–
25/01217/FULL6
54, Clarence Road, Br1 2db
Two-storey extension
Under consideration
–
25/01073/FULL6
44, Bromley Common, Br2 9pd
Rear extension
Approved
May 2025
25/00758/FULL6
87, Canon Road, Br1 2sl
Side extension
Refused
Apr 2025
25/00618/FULL6
63, Southlands Road, Br2 9qr
Side return or wrap-around
Withdrawn
Mar 2025
25/00644/FULL6
27, The Avenue, Br1 2bs
Two-storey extension
Refused
Apr 2025
25/00038/FULL6
69, Siward Road, Br2 9jy
Rear extension
Not needed / lawful
Feb 2025
25/00101/HHPA
54, Clarence Road, Br1 2db
Rear extension
Approved
Feb 2025
24/04648/FULL6
13, Whitehall Road, Br2 9sg
Windows, doors or cladding
Approved
Dec 2024
24/03846/FULL6
20, Jaffray Road, Br2 9nr
Loft or dormer
Approved
Dec 2024
24/03953/FULL6
202, Southlands Road, Br2 9rd
Loft or dormer
Approved
Dec 2024
24/03935/FULL6
41, Walpole Road, Br2 9se
Other householder work
Approved
Nov 2024
24/03769/FULL6
37, Walpole Road, Br2 9se
Other householder work
Approved
Dec 2024
24/03666/FULL6
58, Southlands Road, Br2 9qs
Rear extension
Approved
Oct 2024
24/03364/FULL6
23, Cowper Road, Br2 9rt
Rear extension
Refused
Oct 2024
24/03286/FULL6
30, Liddon Road, Br1 2ss
Rear extension
Approved
Aug 2024
24/02556/FULL6
22, Gundulph Road, Br2 9ll
Two-storey extension
Approved
Sept 2024
24/02159/FULL6
24, Liddon Road, Br1 2ss
Rear extension
Not needed / lawful
May 2024
24/01563/HHPA
60, Tylney Road, Br1 2sh
Side extension
Approved
May 2024
24/00813/FULL6
21, Great Elms Road, Br2 9ne
Rear extension
Approved
Jul 2024
24/01213/FULL6
66, Pope Road, Br2 9qb
Loft or dormer
Approved
Jul 2024
24/01032/FULL6
161, Southlands Road, Br2 9qz
Loft or dormer
Approved
Aug 2024
24/00899/FULL6
18, Chatterton Road, Br2 9qn
Two-storey extension
Approved
Apr 2024
24/00810/FULL6
19, Beaconsfield Road, Br1 2bl
Porch or front extension
Approved
May 2024
24/00884/FULL6
29, Whitehall Road, Br2 9sg
Loft or dormer
Refused
May 2024
24/00723/FULL6
34, Bloomfield Road, Br2 9rz
Rear extension
Approved
Mar 2024
24/00399/FULL6
4, Jaffray Road, Br2 9nr
Two-storey extension
Approved
Mar 2024
23/04818/FULL6
38, Stanley Road, Br2 9jh
Rear extension
Not needed / lawful
Jan 2024
23/04570/HHPA
29, Whitehall Road, Br2 9sg
Loft or dormer
Refused
Jan 2024
23/04484/FULL6
38, Stanley Road, Br2 9jh
Rear extension
Approved
Jan 2024
23/04450/FULL6
129, Homesdale Road, Br2 9le
Loft or dormer
Refused
Dec 2023
23/04216/FULL6
Householder applications validated since 2023 within 600 m. The council's page has the drawings, the decision notice and who the agent or architect was. Hover a row for the description. Source: GLA Planning London Datahub.
–
85% (123)
88%
8 weeks
Basement
–
77% (26)
83%
9 weeks
Porch or front extension
–
92% (94)
81%
8 weeks
Share of decided applications approved since 2023 (number decided in brackets). Withdrawn applications aren't counted; many are withdrawn when refusal looks likely.