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Property guide · Camden

1930s semi-detached extensions in Camden

Bay-fronted suburban semis with hipped roofs and side passages. Dominant outer-London stock.

Quick facts

Property type
1930s semi-detached
Borough
Camden
Planning authority
Camden Council
Article 4 in force
Yes
Conservation areas
40
Drawings from
£840

1930s semi-detached stock in Camden responds best to extensions that respect the existing rhythm. For Victorian and Edwardian period property, side returns and rear infill are routine. For 1930s suburban, single-storey rear and loft conversions dominate. We design to the block, not the brochure.

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Where in Camden does a 1930s semi project actually get determined?

Every Camden postcode district we draw in, the stock that dominates it and the authority that validates a 1930s semi project there. Camden fees below are the statutory England rates for 2026, not 1930s semi project estimates.

PostcodeAreaDominant stockWhat it means for a 1930s semi project
W1TFitzroviaGeorgian terraces, Victorian mansion blocksA 1930s semi project in Fitzrovia may land with Camden Council or Westminster City Council — W1T crosses the boundary, and the W1T policies map decides it street by street.
WC1ABloomsburyVictorian and Edwardian terracesBloomsbury sits wholly inside WC1A, so Camden Council validates every 1930s semi project submitted from an WC1A address.
WC1HBloomsbury / Cartwright GardensVictorian and Edwardian terracesBloomsbury / Cartwright Gardens sits wholly inside WC1H, so Camden Council validates every 1930s semi project submitted from an WC1H address.
WC1NBloomsbury / Russell SquareVictorian and Edwardian terracesBloomsbury / Russell Square sits wholly inside WC1N, so Camden Council validates every 1930s semi project submitted from an WC1N address.
WC1RHolbornVictorian and Edwardian terracesWC1R covers Holborn only; Camden Council handles the 1930s semi project, and Holborn case officers apply the WC1R conservation-area map.

What changes about a 1930s semi project in each part of Camden?

Roof pitch, wall build-up and plot depth change every few Camden streets, and each one changes what a 1930s semi project can achieve at that address.

Does Camden planning policy restrict a 1930s semi project?

Camden conservation designations: there are 40 across Camden Council, Camden Town, Fitzrovia, Hampstead among them. Designation costs a Camden owner the permitted-development route: a 1930s semi project then needs a £258 householder application over 8 weeks, in place of the £120 prior approval route that takes 6 weeks. Camden Town is the Camden designation that most often changes a 1930s semi project design.

Article 4 and your Camden 1930s semi project: 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 1930s semi projects.

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 1930s semi project 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.

What Camden is built from: 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. That mix decides the 1930s semi project route in Camden more than the postcode does. Our fixed fee for 1930s semi projects in Camden starts at £840, against £1,750 for the Complete package that carries a Camden scheme through Camden Council planning and building regulations together.

Which neighbouring authorities border Camden?

Sources for this Camden 1930s semi project 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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