What you could build at UB6 8TL: 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 Perivale, Ealing.
61extensions seen within 600 m in the last 10 years
5loft conversions within 600 m in the last 10 years
75.5extensions 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 Perivale.
Move to a home 20 m² bigger (about £708,000)
Stamp duty on the new home
£25,400
Estate agent on yours 1.2% + VAT
£8,280
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£38,780
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
−£79,800
Money gone
−£22,300
On these figures, extending loses about £61,080 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.
Other householder work
Approved
Apr 2026
254605HH
28, Medway Drive, Ub6 8lw
Rear extension
Not needed / lawful
Feb 2026
254833PALHE
6, Hodder Drive, Ub6 8lh
Garage conversion or garage
Approved
Jan 2026
253525HH
46, Dawlish Avenue, Ub6 8af
Outbuilding or garden room
Approved
Nov 2025
253700HH
39, Rhyl Road, Ub6 8ld
Loft or dormer
Approved
Dec 2025
253674HH
6, Hodder Drive, Ub6 8lh
Rear extension
Not needed / lawful
Sept 2025
252966PALHE
6, Hodder Drive, Ub6 8lh
Rear extension
Refused
Oct 2025
252967HH
32, Scorton Avenue, Ub6 8la
Rear extension
Not needed / lawful
Sept 2025
253097PALHE
22, Teignmouth Gardens, Ub6 8bx
Garage conversion or garage
Approved
Dec 2025
252721HH
27, Ruislip Road East, W13 0az
Loft or dormer
Approved
Sept 2025
252440HH
15, Dawlish Avenue, Ub6 8aq
Rear extension
Refused
Jun 2025
250703PALHE
10, Conway Crescent, Ub6 8hx
Basement
Refused
Jun 2025
251643HH
41, Medway Drive, Ub6 8lw
Other householder work
Approved
Jun 2025
251626HH
9, Teignmouth Gardens, Ub6 8bx
Rear extension
Refused
Jun 2025
251416PALHE
9, Teignmouth Gardens, Ub6 8bx
Rear extension
Refused
Mar 2025
250382PALHE
87, Avalon Road, W13 0bb
Rear extension
Withdrawn
Jan 2025
244579PALHE
77, Avalon Road, W13 0bb
Two-storey extension
Approved
Dec 2024
243810HH
87, Avalon Road, W13 0bb
Rear extension
Refused
Aug 2024
242813PALHE
15, Rockford Avenue, Ub6 8ah
Two-storey extension
Approved
Aug 2024
242483HH
46, Colwyn Avenue, Ub6 8jz
Loft or dormer
Approved
Aug 2024
242331HH
25, Ribchester Avenue, Ub6 8tg
Other householder work
Approved
Jul 2024
241955HH
18, Horsenden Lane South, Ub6 8ab
Two-storey extension
Approved
Jun 2024
241697HH
30, Scorton Avenue, Ub6 8la
Rear extension
Refused
Jun 2024
241928PALHE
46, Colwyn Avenue, Ub6 8jz
Rear extension
Approved
May 2024
241529HH
15, Rockford Avenue, Ub6 8ah
Rear extension
Not needed / lawful
May 2024
241283PALHE
18, Horsenden Lane South, Ub6 8ab
Two-storey extension
Refused
May 2024
240969HH
7, Ruislip Road East, W13 0az
Two-storey extension
Approved
Apr 2024
240674HH
46, Colwyn Avenue, Ub6 8jz
Rear extension
Refused
Mar 2024
240782PALHE
97, Barmouth Avenue, Ub6 8ju
Loft or dormer
Approved
Apr 2024
240737HH
3, Colwyn Avenue, Ub6 8jx
Two-storey extension
Approved
Apr 2024
240738HH
18, Horsenden Lane South, Ub6 8ab
Rear extension
Refused
Feb 2024
240085PALHE
28, Horsenden Lane South, Ub6 8ad
Rear extension
Approved
Jan 2024
234937HH
34, Ribchester Avenue, Ub6 8tg
Two-storey extension
Approved
Feb 2024
235016HH
34, Ribchester Avenue, Ub6 8tg
Rear extension
Not needed / lawful
Feb 2024
235017PALHE
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.