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Planning guide · Southwark

Permitted development in Southwark

Single-storey rear extensions, lofts and side extensions you can build in Southwark without full planning — and the exceptions.

Quick answer

Borough
Southwark
Planning authority
Southwark Council
Article 4 in force
Yes
Conservation areas
43
Statutory determination
8 weeks
Our approval rate
98% first time

Architectural design tools and technical drawings — planning drawings in Southwark

Does permitted development survive Southwark’s Article 4 directions?

Often not. Southwark carries 480 Article 4 areas on the national register, second only to Waltham Forest, alongside 913 listed buildings and 724 tree preservation zones. Its larger-extension sample is small: 12 granted and 4 refused, too few for a published rate.

MeasureSouthwarkLondon
Article 4 areas480
Listed buildings913
Tree preservation zones724
Granted / refused12 / 41,930 / 3,646
Grant ratebelow the publication floor34.6%
Lawful development certificates60436,657

Sources: Article 4, listed building and tree preservation counts from the planning.data.gov.uk designation registers; a count of zero there means the register has no entry for that borough, never that none exist. Decision figures from MHCLG PS1 and PS2, twelve quarters to March 2026, with a rate withheld below the publisher’s minimum case count. Open Government Licence v3.0.

In detail

Answers for Southwark

What can I build under PD in Southwark without planning?

Single-storey rear extension up to 3m deep (attached house) or 4m (detached); side extension up to half the original width; loft conversion up to 40m³ (terraced) or 50m³ (semi-detached); single-storey outbuilding within the curtilage; replacement windows and doors. All subject to material match, eaves setback (20cm), and not facing a highway.

Does Permitted Development apply to flats in Southwark?

No. Permitted Development rights apply only to houses (Class C3 dwellings). Flats and maisonettes require full planning for almost every external alteration.

Are PD rights different in a conservation area?

Yes — significantly reduced. In a conservation area: side extensions and two-storey rear extensions are not PD; cladding is not PD; chimney removal needs planning; roof additions are restricted.

What is a Lawful Development Certificate?

An LDC is a formal confirmation from the council that your proposal is lawful PD — recommended before building, useful when selling. Costs around £103 for council fees + drawings.

Do I need building regulations even under PD?

Yes. Building regulations are entirely separate from planning. Permitted Development removes the planning requirement only — you still need building control sign-off for structure, insulation, fire safety, drainage, and ventilation. We deliver both planning and building regs drawings.

Related guides for Southwark
An architectural technologist checking a printed set of house drawings, marking a proposed elevation in red — permitted development in Southwark
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Where in Southwark does a permitted development scheme actually get determined?

Every Southwark postcode district we draw in, the stock that dominates it and the authority that validates a permitted development scheme there. Southwark fees below are the statutory England rates for 2026, not permitted development scheme estimates.

PostcodeAreaDominant stockWhat it means for a permitted development scheme
SE1Bermondsey / Borough / WaterlooGeorgian terraces, post-war flats, new-buildSE1 straddles a boundary: Bermondsey / Borough / Waterloo addresses fall to Southwark Council or Lambeth Council, so confirm which authority validates the permitted development scheme before submitting SE1 drawings.
SE5CamberwellGeorgian villas, Victorian terracesCamberwell is split at SE5. Either Southwark Council or Lambeth Council can determine a permitted development scheme here, so the SE5 address is checked against both policies maps first.
SE15Peckham / NunheadVictorian terraces, post-war estatesPeckham / Nunhead sits wholly inside SE15, so Southwark Council validates every permitted development scheme submitted from an SE15 address.
SE16Bermondsey / RotherhitheWarehouse conversions, Georgian terraces, new-buildBermondsey / Rotherhithe sits wholly inside SE16, so Southwark Council validates every permitted development scheme submitted from an SE16 address.
SE17WalworthPost-war estates, new-build towersA permitted development scheme at an SE17 address in Walworth is determined by Southwark Council under its own Local Plan policies for Walworth.
SE21Dulwich VillageGeorgian villas, Edwardian villas (Dulwich Estate)SE21 straddles a boundary: Dulwich Village addresses fall to Southwark Council or Lambeth Council, so confirm which authority validates the permitted development scheme before submitting SE21 drawings.
SE22East DulwichVictorian and Edwardian terracesSE22 covers East Dulwich only; Southwark Council handles the permitted development scheme.
SE24Herne HillVictorian villas, Edwardian terracesHerne Hill is split at SE24. Either Lambeth Council or Southwark Council can determine a permitted development scheme here, so the SE24 address is checked against both policies maps first.

What changes about a permitted development scheme in each part of Southwark?

Roof pitch, wall build-up and plot depth change every few Southwark streets, and each one changes what a permitted development scheme can achieve at that address.

How do conservation areas and Article 4 affect a permitted development scheme in Southwark?

Conservation areas covering Southwark: Southwark Council runs 43, and Peckham Rye, Borough, Camberwell Grove are the ones Southwark owners meet most. A permitted development scheme inside a Southwark conservation area loses permitted development, so the Southwark submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Peckham Rye a permitted development scheme is judged on the street elevation first.

Article 4 and your Southwark permitted development scheme: Article 4 for HMOs borough-wide; additional Article 4 for office-to-residential in Bermondsey and Elephant & Castle. At a SE1 address that matters twice over, because Southwark Council applies the direction unevenly across Southwark — we read the Southwark policies map for the exact SE1 address before quoting permitted development schemes.

Southwark housing stock: Georgian and Regency in Bermondsey and Borough; Victorian terraces in Camberwell and Peckham; Dulwich Estate controlled housing; riverside new-build. Dulwich Estate private planning scheme affects much of SE21 and SE22; Southwark planning for rest of borough; strong heritage context. Read that before choosing a permitted development scheme route in Southwark — construction, not postcode, sets what is achievable.

Who decides a permitted development scheme on the edge of Southwark?

Sources for this Southwark permitted development scheme page: borough policies maps and conservation-area registers (2025–26), Royal Mail postcode district boundaries, the Town and Country Planning (Fees for Applications) (England) Regulations, the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended, and the Party Wall etc. Act 1996.

A printed planning application drawing set — proposed elevations, floor plans and the os location plan with the site outlined in red — permitted development in Southwark
The planning set that goes to the council through the Planning Portal: proposed elevations, plans, and the OS location plan with your site outlined.

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