BOROUGH

Planning permission in Camden

Conservation-heavy, design-literate, precedent-driven.
Conservation areas
40
Article 4 areas
20
Average house price
£862,993
12-month change
+1.2%

Constraints: planning.data.gov.uk (ingested 2026-06-13) · Prices: HM Land Registry UK House Price Index, October 2025 · 118 sales in October 2025 · Open Government Licence

Building in Camden — field notes

Camden is one of the most design-literate planning authorities in London. The borough's housing stock — Georgian terraces in Bloomsbury, Victorian villas in Belsize Park and Hampstead, warehouse stock around King's Cross — sits under a dense patchwork of conservation areas, and in streets like those around Hampstead village, Article 4 directions remove permitted development rights that homeowners elsewhere take for granted. The practical effect: projects that would be a prior-approval formality in outer London frequently need full householder applications here, argued on materials, roofline and neighbour amenity.

In our experience building in Camden, officers respond well to applications that lead with precedent — recent consents on the same street, matching brick and joinery specifications, and daylight reports prepared before they are asked for. Rear extensions and side returns on terraced stock are approved routinely when they hold to established projection depths; mansard lofts in conservation areas turn on roof form and slate. Basements are the hard case: Camden's basement policy is among the strictest in London, generally limiting excavation to a single storey beneath the footprint and requiring a Basement Impact Assessment with hydrology and structural sign-off.

Decision times on householder applications generally track the statutory eight weeks, but conservation-area cases involving amended drawings can stretch well beyond. Budget for pre-application advice on anything unusual — in Camden it pays for itself.

Policy detail lives in the Camden local plan and applications are submitted via the Camden planning portal.

Conservation areas in Camden

Real · planning.data.gov.uk

Every designated conservation area in Camden from the official dataset — inside one, permitted development narrows and design scrutiny rises.

  • Alexandra Road
  • Bartholomew Estate
  • Belsize
  • Bloomsbury
  • Camden Broadway
  • Camden Square
  • Camden Town
  • Charlotte Street
  • Dartmouth Park
  • Denmark Street
  • Elsworthy
  • Eton
  • Fitzjohns Netherhall
  • Fitzroy Square
  • Hampstead
  • Hanway Street
  • Harmood Street
  • Hatton Garden
  • Highgate Village
  • Holly Lodge Estate
  • Inkerman
  • Jeffrey's Street
  • Kelly Street
  • Kentish Town
  • Kings Cross St Pancras
  • Kingsway
  • Mansfield
  • Parkhill
  • Primrose Hill
  • Priory Road
  • Redington Frognal
  • Regents Canal
  • Regents Park
  • Rochester
  • Seven Dials (Covent Garden)
  • South Hampstead
  • South Hill Park
  • St Johns Wood
  • West End Green
  • West Kentish Town

Source: planning.data.gov.uk · Open Government Licence. Boundaries are checked at address level by the area report.

Article 4 directions in Camden

Real · planning.data.gov.uk

Article 4 directions in Camden remove specific permitted development rights street by street — the single most common reason a "no permission needed" project turns out to need one.

  • 115, 117, 119, 121A, 127-129 Parkway and 1 Park Willage East
  • 13-51 (odd) & 16-60 (even) Belsize Avenue
  • 147 Kentish Town Road
  • 187 Kentish Town Road
  • 32-66 (even) & 72-90 (even) South Hill Park, NW3 (South Hill Park Estate Conservation Area)
  • 33 York Rise, NW5 (Dartmouth Park Conservation Area)
  • 67 Fitzjohns Avenue area
  • Basements
  • Belsize Conservation Area (various properties)
  • Belsize Conservation Area Non-immediate Article 4
  • Commercial, Business, and Service (Use Class E) to residential (Use Class C3) (in CAZ)
  • Commercial, Business, and Service (Use Class E) to residential (Use Class C3) (outside CAZ)
  • Fitzjohns/Netherhall Conservation Area Non-immediate Article 4
  • Frognal Way
  • Hampstead Conservation Area (excl. Frognal Way) (various properties)
  • Hampstead Conservation Area (excl. Frognal Way) Non-immediate Article 4
  • Launderettes to dwelling houses (Sui Generis to C3)
  • Primrose Hill Conservation Area (various properties) - UNDER REVIEW
  • Redington/Frognal Conservation Area Non-immediate Article 4
  • Swiss Cottage Conservation Area (various properties)

Source: planning.data.gov.uk · Open Government Licence. Boundaries are checked at address level by the area report.

PROJECTS

What gets built in Camden

Rear extension

Precedent-driven: hold to your street's established projection depth and match the stock brick.

Costs & planning route →
Side return extension

Common on Kentish Town and Camden Town terraces; match the consented depth on your run.

Costs & planning route →
Loft conversion

Mansards with natural slate have strong precedent on conservation-area terraces.

Costs & planning route →
Basement extension

Among London's strictest basement policies — single storey, full BIA, listed stock excluded.

Costs & planning route →
Garden room

Rear-garden rooms proceed under PD across most of the borough; listed curtilage in Hampstead is the trap.

Costs & planning route →
DISTRICTS

Camden postcode by postcode

NW1 — Camden Town, Primrose Hill & Regent's Park

NW1 runs from the Nash terraces around Regent's Park through Camden Town to Somers Town. Primrose Hill and the park fringes sit in…

Area report →
NW3 — Hampstead & Belsize Park

NW3 is one of the most constrained districts in London: most of Hampstead village, Belsize Park and the Fitzjohns/Netherhall area …

Area report →
NW5 — Kentish Town, Dartmouth Park & Tufnell Park

NW5's flat-fronted Victorian terraces are classic side-return and loft territory. Dartmouth Park and parts of Kentish Town sit in …

Area report →
NW6 — West Hampstead & Kilburn

NW6 straddles Camden and Brent, with West Hampstead's mansion blocks and Victorian terraces on the Camden side. Conservation cover…

Area report →
WC1 — Bloomsbury & King's Cross

WC1 is Georgian Bloomsbury: garden squares, listed terraces and institutional ownership. Almost the whole district is conservation…

Area report →
FAQ

Camden planning, asked straight

01

Do I need planning permission for a rear extension in Camden?

If your house is outside a conservation area and keeps its permitted development rights, a single-storey rear extension within the size limits (3m on attached houses, up to 6m with prior approval) may not need a full application. In Camden's conservation areas and Article 4 streets — which cover much of Hampstead, Belsize Park and Bloomsbury — assume a full householder application. Check your address first: the constraint map answers this in seconds.
02

Can I build a basement in Camden?

Camden's basement policy is one of London's strictest. Excavation is generally limited to one storey under the existing footprint, with a full Basement Impact Assessment covering ground conditions, hydrology and structural method. Listed buildings and some conservation contexts rule it out entirely. Expect specialist consultants and a longer determination.
03

How long does a householder planning decision take in Camden?

The statutory target is eight weeks from validation. Straightforward householder applications often meet it; conservation-area cases with design negotiation routinely run longer. Pre-application advice and complete drawings at submission are the two best predictors of staying on schedule.
04

How do I check if my Camden home is in a conservation area?

Enter your postcode in the Siteline area check — it runs your coordinates against the official planning.data.gov.uk conservation-area and Article 4 geometries for Camden and shows exactly which designation applies, with the source cited.
05

Are loft conversions approved in Camden conservation areas?

Frequently, yes — but the roof form decides it. Rear mansards with natural slate and traditional dormer proportions have a strong approval record on Camden's Victorian terraces; front-facing dormers and full-width box dormers in conservation areas are usually refused. Nearby precedent is the best guide.
READ

Related reading

Listed building consent — the permission inside the permission

If your home is listed, planning permission is only half the story.

Read the guide →
Party walls: notices, awards, and your neighbours

Almost every London extension, loft and basement engages this Act. Here's how it actually works.

Read the guide →
Permitted development in conservation areas: what you lose and why

Designated land edits the rulebook — here's the exact redline.

Read the guide →
CHECK

What applies at your address?

Borough-level rules only narrow it down. Enter a Camden postcode for the live constraint check — conservation area, Article 4 and sold-price comparables, cited to source.

Check a Camden address

Siteline provides planning and cost intelligence for early feasibility only. It is not legal, planning, valuation, architectural, structural, or surveying advice. All estimates are indicative and must be verified by qualified professionals before purchase, design, planning submission, or construction.

Cost estimates are indicative only — not a quotation. Final price depends on survey, specification, structure, access, party wall matters, VAT, professional fees, and contractor availability.

Planning outcomes are not guaranteed. Local planning authorities make final decisions.