What you could build at UB6 8QU: 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 Greenford South, Ealing.
62extensions seen within 600 m in the last 10 years
2loft conversions within 600 m in the last 10 years
70.8extensions 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 Greenford South.
Move to a home 20 m² bigger (about £611,000)
Stamp duty on the new home
£20,550
Estate agent on yours 1.2% + VAT
£7,200
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£32,850
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
−£66,600
Money gone
−£9,100
On these figures, extending loses about £41,950 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.
11, Stanhope Park Road, Ub6 9lt
Rear extension
Not needed / lawful
Feb 2026
260256PALHE
29, Farndale Crescent, Ub6 9ll
Rear extension
Approved
Mar 2026
260277HH
8, Oldfield Lane South, Ub6 9ld
Rear extension
Not needed / lawful
Feb 2026
260114PALHE
166, Windmill Lane, Ub6 9dp
Two-storey extension
Approved
Jan 2026
254358HH
21, Oakfield Gardens, Ub6 8sd
Porch or front extension
Approved
Jan 2026
254541HH
48, Ravenor Park Road, Ub6 9qy
Rear extension
Approved
Jan 2026
254234HH
19, Barnham Road, Ub6 9lp
Rear extension
Approved
Jan 2026
254309HH
21, Oakfield Gardens, Ub6 8sd
Rear extension
Not needed / lawful
Dec 2025
254038PALHE
710, Greenford Road, Ub6 8qr
Rear extension
Approved
Dec 2025
253576HH
21, Oakfield Gardens, Ub6 8sd
Rear extension
Refused
Oct 2025
253415PALHE
14, Locarno Road, Ub6 8sn
Loft or dormer
Approved
Jan 2026
253336HH
16, Barnham Road, Ub6 9lp
Side return or wrap-around
Approved
Oct 2025
253143HH
22, Locarno Road, Ub6 8sn
Rear extension
Approved
Sept 2025
253016HH
157, Costons Lane, Ub6 9ad
Outbuilding or garden room
Approved
Sept 2025
252614HH
8, Oakfield Gardens, Ub6 8sd
Porch or front extension
Approved
Feb 2026
252134HH
108, Costons Lane, Ub6 8rp
Two-storey extension
Refused
Jul 2025
251958HH
144, Costons Lane, Ub6 9ad
Rear extension
Not needed / lawful
May 2025
251307PALHE
32, Oakfield Gardens, Ub6 8sd
Loft or dormer
Approved
May 2025
251075HH
188, Windmill Lane, Ub6 9dw
Two-storey extension
Approved
May 2025
250871HH
41, Betham Road, Ub6 8sa
Two-storey extension
Approved
Apr 2025
250677HH
95, Costons Lane, Ub6 8rr
Rear extension
Approved
May 2025
250616HH
12, Oakfield Gardens, Ub6 8sd
Rear extension
Approved
May 2025
250622HH
538, Greenford Road, Ub6 8qu
Rear extension
Approved
May 2025
250481HH
70, Betham Road, Ub6 8sa
Rear extension
Not needed / lawful
Feb 2025
250094PALHE
41, Betham Road, Ub6 8sa
Rear extension
Approved
Feb 2025
250084PALHE
62, Farndale Crescent, Ub6 9lw
Garage conversion or garage
Refused
Mar 2026
244757HH
62, Farndale Crescent, Ub6 9lw
Rear extension
Approved
Feb 2025
244758HH
62, Farndale Crescent, Ub6 9lw
Rear extension
Not needed / lawful
Jan 2025
244759PALHE
12, Oakfield Gardens, Ub6 8sd
Rear extension
Refused
Jan 2025
244644PALHE
43, Hicks Avenue, Ub6 8ez
Rear extension
Refused
Dec 2024
244316PALHE
61, Greenford Gardens, Ub6 9na
Rear extension
Not needed / lawful
Dec 2024
243831PALHE
62, Farndale Crescent, Ub6 9lw
Rear extension
Refused
Nov 2024
243911HH
16, Locarno Road, Ub6 8sn
Two-storey extension
Approved
Nov 2024
243721HH
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.
–
88% (76)
88%
8 weeks
Basement
–
81% (52)
83%
10 weeks
Porch or front extension
–
80% (64)
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.