Single-storey rear extensions, lofts and side extensions you can build in Lambeth without full planning — and the exceptions.
Article 4 directions, 223 of them on the national register. Lambeth granted 50 larger home extension notifications against 58 refusals, a 46.3% grant rate above London’s 34.6%, and issued 1,138 lawful development certificates. It also holds 950 listed buildings.
| Measure | Lambeth | London |
|---|---|---|
| Article 4 areas | 223 | — |
| Listed buildings | 950 | — |
| Granted / refused | 50 / 58 | 1,930 / 3,646 |
| Grant rate | 46.3% | 34.6% |
| Prior approval not required | 67 | 9,067 |
| Lawful development certificates | 1,138 | 36,657 |
Sources: MHCLG District Planning Application Statistics (PS1 and PS2), twelve quarters to March 2026. Article 4 and listed building 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. 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 Lambeth postcode district we draw in, the stock that dominates it and the authority that validates a permitted development scheme there. Lambeth 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 |
|---|---|---|---|
| SW4 | Clapham | Victorian terraces, Edwardian villas | A permitted development scheme in Clapham may land with Lambeth Council or Wandsworth Council — SW4 crosses the boundary, and the SW4 policies map decides it street by street. |
| SW8 | South Lambeth / Nine Elms | Victorian terraces, new-build apartments | SW8 straddles a boundary: South Lambeth / Nine Elms addresses fall to Lambeth Council or Wandsworth Council, so confirm which authority validates the permitted development scheme before submitting SW8 drawings. |
| SW9 | Brixton / Stockwell | Victorian terraces, post-war estates | A permitted development scheme at an SW9 address in Brixton / Stockwell is determined by Lambeth Council under its own Local Plan policies for Brixton / Stockwell. |
| SW16 | Streatham / Norbury | Edwardian terraces, post-war flats | SW16 straddles a boundary: Streatham / Norbury addresses fall to Lambeth Council or Wandsworth Council or Merton Council or Croydon Council, so confirm which authority validates the permitted development scheme before submitting SW16 drawings. |
| 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. |
| SE19 | Upper Norwood / Crystal Palace | Victorian villas, Edwardian terraces | Upper Norwood / Crystal Palace is split at SE19. Either Croydon Council or Lambeth Council can determine a permitted development scheme here, so the SE19 address is checked against both policies maps first. |
| 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. |
Roof pitch, wall build-up and plot depth change every few Lambeth streets, and each one changes what a permitted development scheme can achieve at that address.
Conservation areas covering Lambeth: Lambeth Council runs 64, and Kennington, Brockwell Park, Streatham Hill are the ones Lambeth owners meet most. A permitted development scheme inside a Lambeth conservation area loses permitted development, so the Lambeth submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Herne Hill a permitted development scheme is judged on the street elevation first.
Article 4 and your Lambeth permitted development scheme: Borough-wide Article 4 for HMO conversions; plus office-to-residential restrictions. At a SE11 address that matters twice over, because Lambeth Council applies the direction unevenly across Lambeth — we read the Lambeth policies map for the exact SE11 address before quoting permitted development schemes.
What Lambeth is built from: Victorian terraces in Clapham, Brixton, Herne Hill; Edwardian villas; 1930s and post-war estates in parts of Streatham; Georgian in Kennington. Mix of dense Victorian residential and post-war estate; strong conservation area coverage; generally design-led planning decisions. That mix decides the permitted development scheme route in Lambeth more than the postcode does.
Sources for this Lambeth 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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