Single-storey rear extensions, lofts and side extensions you can build in Southwark without full planning — and the exceptions.
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.
| Measure | Southwark | London |
|---|---|---|
| Article 4 areas | 480 | — |
| Listed buildings | 913 | — |
| Tree preservation zones | 724 | — |
| Granted / refused | 12 / 4 | 1,930 / 3,646 |
| Grant rate | below the publication floor | 34.6% |
| Lawful development certificates | 604 | 36,657 |
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 detailSingle-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.
No. Permitted Development rights apply only to houses (Class C3 dwellings). Flats and maisonettes require full planning for almost every external alteration.
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.
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.
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.



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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.
| Postcode | Area | Dominant stock | What it means for a permitted development scheme |
|---|---|---|---|
| SE1 | Bermondsey / Borough / Waterloo | Georgian terraces, post-war flats, new-build | SE1 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. |
| SE5 | Camberwell | Georgian villas, Victorian terraces | Camberwell 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. |
| SE15 | Peckham / Nunhead | Victorian terraces, post-war estates | Peckham / Nunhead sits wholly inside SE15, so Southwark Council validates every permitted development scheme submitted from an SE15 address. |
| SE16 | Bermondsey / Rotherhithe | Warehouse conversions, Georgian terraces, new-build | Bermondsey / Rotherhithe sits wholly inside SE16, so Southwark Council validates every permitted development scheme submitted from an SE16 address. |
| SE17 | Walworth | Post-war estates, new-build towers | A permitted development scheme at an SE17 address in Walworth is determined by Southwark Council under its own Local Plan policies for Walworth. |
| SE21 | Dulwich Village | Georgian 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. |
| SE22 | East Dulwich | Victorian and Edwardian terraces | SE22 covers East Dulwich only; Southwark Council handles the permitted development scheme. |
| SE24 | Herne Hill | Victorian villas, Edwardian terraces | Herne 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. |
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.
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.
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.

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