What you could build at SE5 8JU: 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 Camberwell South, Southwark.
119extensions seen within 600 m in the last 10 years
13loft conversions within 600 m in the last 10 years
128.2extensions 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.
In the Camberwell Grove 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 Camberwell South.
Move to a home 20 m² bigger (about £919,000)
Stamp duty on the new home
£35,950
Estate agent on yours 1.2% + VAT
£10,728
Solicitors, buying and selling
£3,000
Survey
£600
Removals
£1,500
Money gone
£51,778
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
−£104,400
Money gone
−£46,900
On these figures, extending loses about £98,678 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.
7, Soames Street, Se15 4bz
Side return or wrap-around
Under consideration
–
26/AP/2607
115, Third Floor Flat, Camberwell Grove, Se5 8jh
Loft or dormer
Under consideration
–
26/AP/1990
1, Maldon Close, Se5 8dd
Outbuilding or garden room
Approved
Sept 2026
26/AP/2270
190, Choumert Road, Se15 4ab
Other householder work
Refused
Sept 2026
26/AP/2071
81, Grove Hill Road, Se5 8df
Rear extension
Approved
Aug 2026
26/AP/1789
63, Vestry Road, Se5 8pg
Loft or dormer
Approved
Aug 2026
26/AP/1702
155, Chadwick Road, Se15 4py
Two-storey extension
Approved
Sept 2026
26/AP/1744
250, Bellenden Road, Se15 4by
Side extension
Approved
Aug 2026
26/AP/1809
65, Grove Hill Road, Se5 8df
Other householder work
Withdrawn
Aug 2026
26/AP/1785
83, Crofton Road, Se5 8lz
Basement
Refused
Jul 2026
26/AP/1308
2, Pelham Close, Se5 8lw
Windows, doors or cladding
Approved
Jul 2026
26/AP/1494
70, Linnell Road, Se5 8nj
Side return or wrap-around
Approved
Jul 2026
26/AP/1318
27, Oswyth Road, Se5 8nh
Side return or wrap-around
Approved
Jul 2026
26/AP/1415
97, Grove Park, Se5 8le
Loft or dormer
Approved
Jul 2026
26/AP/1050
60, Grove Park, Se5 8lf
Loft or dormer
Approved
Aug 2026
26/AP/0784
25, St Francis Road, Se22 8de
Loft or dormer
Approved
Jun 2026
26/AP/0898
24, Champion Grove, Se5 8bw
Other householder work
Approved
Apr 2026
26/AP/0611
23, Stories Mews, Se5 8jj
Loft or dormer
Approved
Apr 2026
26/AP/0509
7, Copleston Road, Se15 4an
Loft or dormer
Approved
Mar 2026
26/AP/0459
30, Avondale Rise, Se15 4al
Rear extension
Approved
Mar 2026
26/AP/0471
4, Danby Street, Se15 4bu
Loft or dormer
Approved
Apr 2026
26/AP/0356
60, Hayes Grove, Se22 8df
Garage conversion or garage
Approved
Mar 2026
25/AP/3668
62, Grove Park, Se5 8lf
Side extension
Approved
Mar 2026
26/AP/0161
56, Hayes Grove, Se22 8df
Garage conversion or garage
Approved
Feb 2026
26/AP/0135
81, Grove Hill Road, Se5 8df
Loft or dormer
Approved
Feb 2026
25/AP/3522
9, Malfort Road, Se5 8dq
Loft or dormer
Approved
Feb 2026
25/AP/3625
157, Camberwell Grove, Se5 8js
Loft or dormer
Approved
Jan 2026
25/AP/3468
3b, Canning Cross, Se5 8bh
Rear extension
Refused
Mar 2026
25/AP/3347
32, Danby Street, Se15 4bu
Rear extension
Approved
Jan 2026
25/AP/3465
4, Ainsworth Close, Se15 5ax
Windows, doors or cladding
Approved
Jan 2026
25/AP/3554
7, Gairloch Road, Se5 8ng
Loft or dormer
Approved
Jan 2026
25/AP/3510
32, Danby Street, Se15 4bu
Loft or dormer
Approved
Jan 2026
25/AP/3467
17, Lyndhurst Grove, Se15 5an
Rear extension
Approved
Dec 2025
25/AP/3390
3, Graces Road, Se5 8pf
Loft or dormer
Approved
Dec 2025
25/AP/3258
21, Oswyth Road, Se5 8nh
Loft or dormer
Approved
Jan 2026
25/AP/3263
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.
–
100% (47)
88%
7 weeks
Basement
–
96% (47)
83%
8 weeks
Porch or front extension
–
100% (19)
81%
7 weeks
Share of decided applications approved since 2023 (number decided in brackets). Withdrawn applications aren't counted; many are withdrawn when refusal looks likely.