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Improving at SE5 8AA

What you could build at SE5 8AA: 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.

79extensions seen within 600 m in the last 10 years

15loft conversions within 600 m in the last 10 years

84%of 49 householder applications nearby approved (since 2023)

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.

What neighbours have built

Home	Work	Seen	Space added	Floor area	Rooms	Distance
116, Denmark Hill	Extension	2026	+41 m²	35 m² → 76 m²	–	58 m
60, Allendale Close	Extension	2026	+16 m²	44 m² → 60 m²	–	158 m
Flat 3, 31, De Crespigny Park	Extension	2026	+44 m²	74 m² → 118 m²	–	165 m
10, Denmark Hill	Loft conversion	2026	+44 m²	16 m² → 60 m²	1 → 3	326 m
53, Grove Lane	Loft conversion	2026	+45 m²	167 m² → 212 m²	7 → 7	333 m
58a, Camberwell Church Street	Extension	2026	+22 m²	65 m² → 87 m²	–	438 m

Planning applications nearby

Address	Work	Outcome	Decided	Drawings and agent
115, Third Floor Flat, Camberwell Grove, Se5 8jh	Loft or dormer	Under consideration	–	26/AP/1990
48, 50, Second Floor, Denmark Hill, Se5 8rz	Other householder work	Under consideration	–	26/AP/2300
42, Grove Lane, Se5 8st	Loft or dormer	Under consideration	–	26/AP/1796
41, Camberwell Grove, Se5 8ja	Other householder work	Approved	Jun 2026	26/AP/1243
17, Allendale Close, Se5 8sg	Rear extension	Not needed / lawful	May 2026	26/AP/0901
24, Champion Grove, Se5 8bw	Other householder work	Approved	Apr 2026	26/AP/0611

How often householder applications are approved

Work	Camberwell South	Southwark	London	Typical decision time
All householder applications	92% (108)	92% (2175)	80%	7 weeks
Loft or dormer	96% (52)	94% (980)	81%	7 weeks
Rear extension	82% (17)	92% (365)	79%	7 weeks
Two-storey extension	–	83% (83)	72%	8 weeks
Other householder work	80% (10)	80% (171)	70%	7 weeks
Side return or wrap-around	100% (7)	98% (208)	88%	7 weeks
Windows, doors or cladding	90% (10)	90% (110)	90%	7 weeks
Outbuilding or garden room	–	82% (77)	79%	7 weeks
Side extension	–	99% (68)	86%	7 weeks
Garage conversion or garage

Cost and the value it adds

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.

Your home is worthExtra space you need (m²)Homes here sell for, per m²Building cost per m²Share of that an extension adds (%)

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.

Find help: RIBA Find an Architect ↗ · CIAT architectural technologists ↗ · TrustMark tradespeople ↗ · Federation of Master Builders ↗ · Planning Portal guides ↗

General guidance, not planning or legal advice. Fees and rules as checked in October 2026; confirm with the council.

Energy certificates: MHCLG (OGL). Planning applications: GLA Planning London Datahub. Conservation areas and Article 4: planning.data.gov.uk (OGL).

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Improving at SE5 8AA

The rules at this address

What neighbours have built

Planning applications nearby

How often householder applications are approved

Cost and the value it adds

Move or improve?

Getting started

Go deeper

Improving at SE5 8AA

SE5 8AA is on Denmark Hill

The rules at this address

What neighbours have built

Planning applications nearby

How often householder applications are approved

Cost and the value it adds

Move or improve?

Getting started

Go deeper

SE5 8AA is on Denmark Hill