House Extension Drawings in Camden

Where in Camden does a house extension actually get determined?

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

What changes about a house extension in each part of Camden?

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

• Hampstead (NW3) — affluent, listed Georgian and Victorian villas defines Hampstead, where georgian and victorian villas, listed buildings set what a house extension can do. Georgian rear elevations here are usually the listed or locally listed face of the building across NW3. Any Hampstead house extension is validated by Camden Council, with Hampstead Heath the usual Hampstead reference point on the site plan.
• Primrose Hill (NW1) — house extension work in Primrose Hill means victorian and edwardian terraces. Primrose Hill is boutique village atmosphere, painted terraces. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage throughout NW1. Camden Council decides the Primrose Hill application, and Primrose Hill park anchors the Primrose Hill location plan.
• Kentish Town (NW5) — a house extension in Kentish Town starts from victorian terraces, and Kentish Town reads as Victorian terraced streets, gentrifying. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage in NW5. Camden Council assesses Kentish Town house extensions against its own Kentish Town character guidance, and the location plan we draw for Kentish Town references Kentish Town City Farm.
• Belsize Park (NW3) — a house extension in Belsize Park starts from edwardian mansion blocks, victorian villas, and Belsize Park reads as tree-lined avenues, Edwardian mansion blocks. The side-return infill is the classic move on these Victorian terraces — 3 m of permitted development depth plus the width of the original side passage in NW3. Camden Council assesses Belsize Park house extensions against its own Belsize Park character guidance, and the location plan we draw for Belsize Park references Belsize Park station.
• Bloomsbury (WC1) — house extension work in Bloomsbury means georgian terraces, listed buildings. Bloomsbury is Georgian squares, academic. Georgian rear elevations here are usually the listed or locally listed face of the building throughout WC1. Camden Council decides the Bloomsbury application, and British Museum anchors the Bloomsbury location plan.
• Fitzrovia (W1T) — house extension work in Fitzrovia means georgian terraces, victorian mansion blocks. Fitzrovia is Georgian and Victorian mix, creative quarter. Georgian rear elevations here are usually the listed or locally listed face of the building throughout W1T. Camden Council decides the Fitzrovia application, and Fitzroy Square anchors the Fitzrovia location plan.
• King's Cross (N1C) — a house extension in King's Cross starts from modern apartments, converted warehouses, and King's Cross reads as regenerated quarter, contemporary new-build. Modern housing here is frequently covered by a planning condition removing permitted development rights in N1C. Camden Council assesses King's Cross house extensions against its own King's Cross character guidance, and the location plan we draw for King's Cross references King's Cross Station.

What local planning policy applies to a house extension in Camden?

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 house extension then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Hampstead is the Camden designation that most often changes a house extension design.

What Article 4 removes near Camden: Article 4 removes permitted development for HMO conversions (C3 to C4) across the borough, plus restrictions on basement extensions in 12 conservation areas. Before pricing a house extension we check whether the N1C address is inside the mapped area, because Camden Council draws the Camden boundary street by street rather than across the whole of Camden.

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 house extension 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 house extension route in Camden — construction, not postcode, sets what is achievable. Camden Council charges £548 for a householder application and has 8 weeks to determine it.

Who decides a house extension on the edge of Camden?

• City of London — cross the Camden boundary and City of London Corporation takes the house extension instead, applying 27 conservation areas of its own around EC1. We re-price house extensions at the Camden edge because City of London policy and Camden policy rarely align on house extension depth.
• Westminster — adjoining Camden, with 56 conservation areas centred on SW1. A house extension on the far side of the Camden line is determined by Westminster City Council, so the Camden quote for house extensions is checked against Westminster guidance before it is issued.
• Islington — adjoining Camden, with 40 conservation areas centred on N1. A house extension on the far side of the Camden line is determined by Islington Council, so the Camden quote for house extensions is checked against Islington guidance before it is issued.
• Barnet — cross the Camden boundary and Barnet Council takes the house extension instead, applying 20 conservation areas of its own around N2. We re-price house extensions at the Camden edge because Barnet policy and Camden policy rarely align on house extension depth.

Sources for this Camden house extension 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.