What you could build at UB5 6QS: 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 Kingshill Avenue, Ealing.
42extensions seen within 600 m in the last 10 years
5loft conversions within 600 m in the last 10 years
69.9extensions 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
Mostly flats at this postcode. Flats have no permitted development rights, so almost any extension or loft conversion needs planning permission, and the freeholder's consent under the lease.
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 Kingshill Avenue.
Move to a home 20 m² bigger (about £550,000)
Stamp duty on the new home
£17,500
Estate agent on yours 1.2% + VAT
£6,480
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£29,080
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
−£60,000
Money gone
−£2,500
On these figures, extending loses about £31,580 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.
262068PALHE
25, Arliss Way, Ub5 5jt
Two-storey extension
Approved
Jul 2026
261620HH
8, Rushdene Crescent, Ub5 6ne
Loft or dormer
Under consideration
–
261334HH
19a, Rushdene Close, Ub5 6nr
Loft or dormer
Approved
Jun 2026
261402HH
45, Hawtrey Avenue, Ub5 5jd
Rear extension
Not needed / lawful
Apr 2026
261189PALHE
44, Kingshill Avenue, Ub5 6lf
Rear extension
Under consideration
–
260508HH
19, Rushdene Close, Ub5 6nr
Loft or dormer
Approved
Apr 2026
254758HH
18, Newdene Avenue, Ub5 5je
Rear extension
Not needed / lawful
Jan 2026
254566PALHE
25, Gurney Road, Ub5 6lj
Rear extension
Not needed / lawful
Dec 2025
254236PALHE
18, Nutfield Gardens, Ub5 6lt
Loft or dormer
Approved
Dec 2025
253808HH
10, Lynne Way, Ub5 5jg
Rear extension
Refused
Dec 2025
253742HH
43, Nutfield Gardens, Ub5 6lu
Porch or front extension
Refused
Nov 2025
253722HH
18, Nutfield Gardens, Ub5 6lt
Rear extension
Not needed / lawful
Oct 2025
253233PALHE
1, Gurney Road, Ub5 6lj
Two-storey extension
Approved
Dec 2025
253173HH
19, Rushdene Close, Ub5 6nr
Loft or dormer
Approved
Oct 2025
253040HH
8, Rushdene Crescent, Ub5 6ne
Rear extension
Approved
Sept 2025
252713HH
1, Gurney Road, Ub5 6lj
Loft or dormer
Approved
Oct 2025
252590HH
41, Hawtrey Avenue, Ub5 5jb
Side extension
Approved
Sept 2025
252361HH
8, Rubens Road, Ub5 5jh
Rear extension
Not needed / lawful
Jul 2025
252242PALHE
10, Lynne Way, Ub5 5jg
Rear extension
Refused
Jul 2025
252070PALHE
19, Rushdene Close, Ub5 6nr
Rear extension
Approved
Jun 2025
251509PALHE
3, Thorndike Avenue, Ub5 5la
Two-storey extension
Refused
Jun 2025
251780HH
8, Rushdene Crescent, Ub5 6ne
Rear extension
Not needed / lawful
May 2025
251594PALHE
14, Down Close, Ub5 6ns
Rear extension
Not needed / lawful
Apr 2025
251050PALHE
9, Merlin Close, Ub5 6jg
Rear extension
Refused
Apr 2025
250955PALHE
25, Watery Lane, Ub5 6ql
Rear extension
Not needed / lawful
Apr 2025
250842PALHE
12, Vanbrough Crescent, Ub5 5jn
Porch or front extension
Approved
Jan 2025
243968HH
79, Rushdene Crescent, Ub5 6ng
Rear extension
Refused
Nov 2024
243985PALHE
15, Perry Garth, Ub5 5jz
Two-storey extension
Approved
Dec 2024
243926HH
47, Rushdene Crescent, Ub5 6nf
Loft or dormer
Approved
Dec 2024
243570HH
84, Vanbrough Crescent, Ub5 5jp
Rear extension
Approved
Nov 2024
243511HH
30, Rushdene Crescent, Ub5 6nf
Rear extension
Not needed / lawful
Oct 2024
243401PALHE
3, West End Gardens, Ub5 6qr
Rear extension
Refused
Aug 2024
242831PALHE
24, Nutfield Gardens, Ub5 6lu
Rear extension
Refused
Sept 2024
242329HH
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.