Single-storey rear extensions, lofts and side extensions you can build in Camden without full planning — and the exceptions.
Not much. Camden carries 21 Article 4 areas and 1,967 listed buildings, and its statutory return records only 8 larger-extension notifications needing no prior approval across twelve quarters. With 6 granted and 1 refused, the sample is too small for a meaningful rate.
| Measure | Camden | London |
|---|---|---|
| Article 4 areas | 21 | — |
| Listed buildings | 1,967 | — |
| Prior approval not required | 8 | 9,067 |
| Granted / refused | 6 / 1 | 1,930 / 3,646 |
| Grant rate | below the publication floor | 34.6% |
| Lawful development certificates | 342 | 36,657 |
Sources: MHCLG District Planning Application Statistics (PS1 and PS2), twelve quarters to March 2026; a rate is withheld where the borough falls below the publisher’s minimum case count. Article 4 and listed building counts from the planning.data.gov.uk designation registers. 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 Camden postcode district we draw in, the stock that dominates it and the authority that validates a permitted development scheme there. Camden 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 |
|---|---|---|---|
| NW6 | Kilburn / West Hampstead / Queen's Park | Mansion blocks, post-war flats | A permitted development scheme in Kilburn / West Hampstead / Queen's Park may land with Camden Council or Brent Council — NW6 crosses the boundary, and the NW6 policies map decides it street by street. |
| W1T | Fitzrovia | Georgian terraces, Victorian mansion blocks | Fitzrovia is split at W1T. Either Camden Council or Westminster City Council can determine a permitted development scheme here, so the W1T address is checked against both policies maps first. |
| WC1A | Bloomsbury | Victorian and Edwardian terraces | A permitted development scheme at an WC1A address in Bloomsbury is determined by Camden Council under its own Local Plan policies for Bloomsbury. |
| WC1H | Bloomsbury / Cartwright Gardens | Victorian and Edwardian terraces | Bloomsbury / Cartwright Gardens sits wholly inside WC1H, so Camden Council validates every permitted development scheme submitted from an WC1H address. |
| WC1N | Bloomsbury / Russell Square | Victorian and Edwardian terraces | Bloomsbury / Russell Square sits wholly inside WC1N, so Camden Council validates every permitted development scheme submitted from an WC1N address. |
| WC1R | Holborn | Victorian and Edwardian terraces | WC1R covers Holborn only; Camden Council handles the permitted development scheme. |
Roof pitch, wall build-up and plot depth change every few Camden streets, and each one changes what a permitted development scheme can achieve at that address.
Camden conservation designations: there are 40 across Camden Council, Primrose Hill, Bloomsbury, Camden Town among them. Designation costs a Camden owner the permitted-development route: a permitted development scheme then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Bloomsbury is the Camden designation that most often changes a permitted development scheme design.
Article 4 and your Camden permitted development scheme: Article 4 removes permitted development for HMO conversions (C3 to C4) across the borough, plus restrictions on basement extensions in 12 conservation areas. At a N1C address that matters twice over, because Camden Council applies the direction unevenly across Camden — we read the Camden policies map for the exact N1C address before quoting permitted development schemes.
Digging below a Camden property: Camden's basement policy (Policy A5) restricts single-storey basements to 50% of garden area; double-storey basements generally refused outside commercial zones. Where a permitted development scheme in Camden involves excavation that is read beside the Party Wall etc. Act 1996, which needs two months notice for a Camden dig within 3 m of a neighbour, and Camden Council expects the N1C ground conditions addressed in the application.
Camden housing stock: Victorian and Edwardian terraces, Georgian townhouses in Bloomsbury and Hampstead, post-war mansion blocks, modern developments in King's Cross. Creative, affluent in Hampstead and Primrose Hill; dense mixed-use around Camden Town and Kings Cross; academic character in Bloomsbury. Read that before choosing a permitted development scheme route in Camden — construction, not postcode, sets what is achievable.
Sources for this Camden 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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