What you could build at W3 0LR: 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 North Ealing, Ealing.
105extensions seen within 600 m in the last 10 years
7loft conversions within 600 m in the last 10 years
103.3extensions 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.
In the Hanger Hill Garden Estate conservation area: permitted development is narrower (for example no side extensions or roof cladding), and demolition and works to trees need consent.
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 North Ealing.
Move to a home 20 m² bigger (about £820,000)
Stamp duty on the new home
£31,000
Estate agent on yours 1.2% + VAT
£9,792
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£45,892
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
−£84,000
Money gone
−£26,500
On these figures, extending loses about £72,392 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.
29, Beaufort Road, W5 3eb
Loft or dormer
Under consideration
–
262259HH
28, Queens Drive, W3 0ha
Garage conversion or garage
Approved
Aug 2026
262219HH
2, Ashbourne Road, W5 3ed
Two-storey extension
Under consideration
–
262030HH
8, The Ridings, W5 3bu
Side extension
Under consideration
–
261973HH
14, Queens Drive, W3 0ha
Loft or dormer
Under consideration
–
261980HH
156, Noel Road, W3 0jr
Rear extension
Under consideration
–
261842HH
22, Hanger View Way, W3 0ex
Rear extension
Approved
Jun 2026
261659HH
79, Monks Drive, W3 0ed
Rear extension
Approved
Jun 2026
261565HH
60, Corringway, W5 3ad
Loft or dormer
Approved
Jun 2026
261412HH
62, Noel Road, W3 0jt
Rear extension
Not needed / lawful
Apr 2026
261186PALHE
22, Ashbourne Road, W5 3ed
Side return or wrap-around
Approved
Apr 2026
260740HH
15, Walton Way, W3 0aw
Rear extension
Not needed / lawful
Mar 2026
260675PALHE
6, Vale Lane, W3 0dy
Loft or dormer
Approved
May 2026
260173HH
154, Noel Road, W3 0jr
Rear extension
Not needed / lawful
Apr 2026
260456PALHE
223, Princes Gardens, W3 0lu
Side extension
Approved
Jul 2026
260077HH
94, Corringway, W5 3ha
Other householder work
Approved
Jul 2026
260070HH
41, Beaufort Road, W5 3eb
Side return or wrap-around
Approved
Mar 2026
254752HH
169, Noel Road, W3 0jj
Other householder work
Approved
Feb 2026
254618HH
9, East Close, W5 3he
Loft or dormer
Approved
Apr 2026
254609HH
47, Audley Road, W5 3es
Loft or dormer
Under consideration
–
254617HH
14, Walton Way, W3 0aw
Rear extension
Not needed / lawful
Jan 2026
254570PALHE
82, Boileau Road, W5 3aj
Loft or dormer
Approved
Jan 2026
254437HH
26, Princes Gardens, W3 0lg
Windows, doors or cladding
Approved
Jan 2026
254147HH
144, Noel Road, W3 0jr
Rear extension
Not needed / lawful
Dec 2025
254072PALHE
60, Corringway, W5 3ad
Loft or dormer
Refused
Jan 2026
253934HH
51, Beaufort Road, W5 3eb
Loft or dormer
Approved
Jun 2026
253656HH
162, Noel Road, W3 0jr
Windows, doors or cladding
Approved
Nov 2025
253467HH
85, Corringway, W5 3hd
Outbuilding or garden room
Approved
Nov 2025
253474HH
8, Beaufort Close, W5 3ee
Windows, doors or cladding
Approved
Mar 2026
253024HH
4, East Close, W5 3he
Loft or dormer
Approved
Mar 2026
253306HH
7, Vale Lane, W3 0dy
Rear extension
Approved
Oct 2025
253238HH
41, Beaufort Road, W5 3eb
Two-storey extension
Refused
Dec 2025
252639HH
19, Audley Road, W5 3es
Garage conversion or garage
Refused
Oct 2025
253110HH
6, Groveside Close, W3 0dx
Two-storey extension
Approved
Oct 2025
253094HH
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.
67% (6)
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.