What you could build at TW2 7NT: 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 Whitton, Richmond upon Thames.
111extensions seen within 600 m in the last 10 years
9loft conversions within 600 m in the last 10 years
90.9extensions 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
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 Whitton.
Move to a home 20 m² bigger (about £783,000)
Stamp duty on the new home
£29,150
Estate agent on yours 1.2% + VAT
£9,288
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£43,538
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
−£82,800
Money gone
−£25,300
On these figures, extending loses about £68,838 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.
36, Devon Avenue, Tw2 6pw
Rear extension
Approved
Aug 2026
PA26/2407
32, Redway Drive, Tw2 7nx
Rear extension
Approved
Aug 2026
PA26/2060
60, Cypress Avenue, Tw2 7jz
Side return or wrap-around
Approved
Aug 2026
PA26/2259
88, Nelson Road, Tw2 7ay
Loft or dormer
Under consideration
–
PA26/2003
62, The Ridge, Tw2 7nq
Rear extension
Approved
Sept 2026
PA26/2047
46, Redway Drive, Tw2 7nw
Loft or dormer
Under consideration
–
PA26/2084
147, Nelson Road, Tw2 7bb
Rear extension
Under consideration
–
PA26/2088
70, The Ridge, Tw2 7nq
Rear extension
Approved
Jul 2026
PA26/1676
456, Chertsey Road, Tw2 6lr
Loft or dormer
Under consideration
–
PA26/1580
57, Hounslow Road, Tw2 7bz
Rear extension
Under consideration
–
PA26/1611
65, Hounslow Road, Tw2 7ha
Loft or dormer
Under consideration
–
PA26/1532
30, Jubilee Avenue, Tw2 6jb
Two-storey extension
Under consideration
–
PA26/1430
48, Pauline Crescent, Tw2 6jd
Rear extension
Under consideration
–
PA26/1461
33, Prospect Crescent, Tw2 7eb
Side return or wrap-around
Under consideration
–
PA26/1435
79, Redway Drive, Tw2 7nn
Loft or dormer
Under consideration
–
PA26/1368
60, Prospect Crescent, Tw2 7ea
Loft or dormer
Other
May 2026
PA26/1310
17, Melrose Avenue, Tw2 7je
Rear extension
Under consideration
–
PA26/1109
446, Chertsey Road, Tw2 6lp
Rear extension
Under consideration
–
PA25/4247
173, Kneller Road, Tw2 7dy
Rear extension
Under consideration
–
PA26/1021
74, Gladstone Avenue, Tw2 7qa
Loft or dormer
Approved
May 2026
PA26/1003
12, Bryanston Avenue, Tw2 6hp
Rear extension
Under consideration
–
PA26/0960
12, Strathearn Avenue, Tw2 6ju
Garage conversion or garage
Approved
Apr 2026
PA26/0760
143, Kneller Road, Tw2 7dy
Two-storey extension
Under consideration
–
PA26/0661
88, Gladstone Avenue, Tw2 7qa
Garage conversion or garage
Approved
Apr 2026
PA26/0686
164, Percy Road, Tw2 6jf
Loft or dormer
Other
Apr 2026
PA26/0489
25, Bridge Way, Tw2 7jl
Side extension
Approved
May 2026
PA26/0200
13, Cypress Avenue, Tw2 7jy
Two-storey extension
Approved
Mar 2026
PA26/0165
14, Godfrey Avenue, Tw2 7pf
Porch or front extension
Approved
Mar 2026
PA26/0047
13, Pauline Crescent, Tw2 6jd
Rear extension
Other
Feb 2026
PA25/4338
11, Pauline Crescent, Tw2 6jd
Loft or dormer
Other
Feb 2026
PA25/4339
31, Bridge Way, Tw2 7jl
Rear extension
Approved
Jan 2026
PA25/4233
13, Wiltshire Gardens, Tw2 6nd
Rear extension
Approved
Feb 2026
PA25/4134
61, Redway Drive, Tw2 7nn
Loft or dormer
Approved
Jan 2026
PA25/4150
25, Bridge Way, Tw2 7jl
Loft or dormer
Other
Jan 2026
PA25/4005
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%
8 weeks
Basement
–
–
83%
9 weeks
Porch or front extension
–
–
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.