What you could build at TW2 6BD: 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 Heathfield, Richmond upon Thames.
100extensions seen within 600 m in the last 10 years
5loft conversions within 600 m in the last 10 years
102.3extensions 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.
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 Heathfield.
Move to a home 20 m² bigger (about £723,000)
Stamp duty on the new home
£26,150
Estate agent on yours 1.2% + VAT
£8,640
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£39,890
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
−£73,800
Money gone
−£16,300
On these figures, extending loses about £56,190 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.
95, Lyndhurst Avenue, Tw2 6bh
Rear extension
Under consideration
–
PA26/1619
46, Beech Way, Tw2 5jt
Outbuilding or garden room
Approved
Jul 2026
PA26/1690
56, Hospital Bridge Road, Tw2 5uj
Rear extension
Under consideration
–
PA26/1545
14, Willow Way, Tw2 5jw
Rear extension
Under consideration
–
PA26/1277
70, Lyndhurst Avenue, Tw2 6bu
Rear extension
Under consideration
–
PA26/1104
1, Beech Way, Tw2 5js
Loft or dormer
Approved
Apr 2026
PA25/4557
448, Staines Road, Tw2 5jd
Garage conversion or garage
Under consideration
–
PA26/1150
207, Lincoln Avenue, Tw2 6nl
Rear extension
Approved
May 2026
PA26/1154
456, Staines Road, Tw2 5jd
Loft or dormer
Under consideration
–
PA26/1040
34, Fulwell Park Avenue, Tw2 5hq
Two-storey extension
Other
–
PA26/1001
10, Ellerman Avenue, Tw2 6as
Loft or dormer
Approved
May 2026
PA26/0815
50, Powder Mill Lane, Tw2 6ed
Rear extension
Under consideration
–
PA26/0224
10, Ellerman Avenue, Tw2 6as
Loft or dormer
Approved
Apr 2026
PA26/0618
43, Ellerman Avenue, Tw2 6aa
Rear extension
Approved
Mar 2026
PA26/0458
90, Lyndhurst Avenue, Tw2 6bu
Loft or dormer
Other
Feb 2026
PA25/4489
68, Waverley Avenue, Tw2 6dw
Outbuilding or garden room
Approved
May 2026
PA25/4334
316, Staines Road, Tw2 5as
Outbuilding or garden room
Approved
Dec 2025
PA25/3370
207, Lincoln Avenue, Tw2 6nl
Rear extension
Other
Jan 2026
PA25/3923
29, Manoel Road, Tw2 5hj
Side return or wrap-around
Approved
Dec 2025
PA25/3939
34, Woodlawn Crescent, Tw2 6bd
Side extension
Approved
Nov 2025
PA25/3238
13, Fulwell Park Avenue, Tw2 5hf
Garage conversion or garage
Approved
Nov 2025
PA25/2792
62, Waverley Avenue, Tw2 6dw
Rear extension
Approved
Nov 2025
PA25/3076
77, Beech Way, Tw2 5js
Rear extension
Approved
Oct 2025
PA25/2923
2, Sheringham Avenue, Tw2 6aw
Loft or dormer
Approved
Oct 2025
PA25/2503
8, Sheringham Avenue, Tw2 6aw
Rear extension
Approved
Mar 2026
PA25/2254
263, Lincoln Avenue, Tw2 6nl
Rear extension
Approved
Aug 2025
PA25/2519
1, Waverley Avenue, Tw2 6dq
Garage conversion or garage
Approved
Sept 2025
PA25/2219
113, Fulwell Park Avenue, Tw2 5hg
Rear extension
Approved
Jul 2025
PA25/2290
81, Waverley Avenue, Tw2 6dh
Loft or dormer
Approved
Jul 2025
PA25/1328
34, Hospital Bridge Road, Tw2 5uj
Rear extension
Approved
Jul 2025
PA25/1840
3, Elm Close, Tw2 5jr
Side extension
Approved
Aug 2025
PA25/1621
2, Sheringham Avenue, Tw2 6aw
Porch or front extension
Approved
Jun 2025
PA25/1549
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
100% (5)
–
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.