Two-storey rear extension in Camden

Which Camden postcodes does this two storey rear service cover?

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

How does a two storey rear differ street by street across Camden?

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

• Hampstead (NW3) — a two storey rear in Hampstead starts from georgian and victorian villas, listed buildings, and Hampstead reads as affluent, listed Georgian and Victorian villas. Georgian rear elevations here are usually the listed or locally listed face of the building in NW3. Camden Council assesses Hampstead two storey rears against its own Hampstead character guidance, and the location plan we draw for Hampstead references Hampstead Heath.
• Primrose Hill (NW1) — a two storey rear in Primrose Hill starts from victorian and edwardian terraces, and Primrose Hill reads as 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 in NW1. Camden Council assesses Primrose Hill two storey rears against its own Primrose Hill character guidance, and the location plan we draw for Primrose Hill references Primrose Hill park.
• Kentish Town (NW5) — Victorian terraced streets, gentrifying defines Kentish Town, where victorian terraces set what a two storey rear can do. 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 across NW5. Any Kentish Town two storey rear is validated by Camden Council, with Kentish Town City Farm the usual Kentish Town reference point on the site plan.
• Belsize Park (NW3) — two storey rear work in Belsize Park means edwardian mansion blocks, victorian villas. Belsize Park is 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 throughout NW3. Camden Council decides the Belsize Park application, and Belsize Park station anchors the Belsize Park location plan.
• Bloomsbury (WC1) — Georgian squares, academic defines Bloomsbury, where georgian terraces, listed buildings set what a two storey rear can do. Georgian rear elevations here are usually the listed or locally listed face of the building across WC1. Any Bloomsbury two storey rear is validated by Camden Council, with British Museum the usual Bloomsbury reference point on the site plan.
• Fitzrovia (W1T) — two storey rear 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) — two storey rear work in King's Cross means modern apartments, converted warehouses. King's Cross is regenerated quarter, contemporary new-build. Modern housing here is frequently covered by a planning condition removing permitted development rights throughout N1C. Camden Council decides the King's Cross application, and King's Cross Station anchors the King's Cross location plan.

Does Camden planning policy restrict a two storey rear?

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 two storey rear 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 two storey rear 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 two storey rear 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.

Camden below-ground policy: Camden's basement policy (Policy A5) restricts single-storey basements to 50% of garden area; double-storey basements generally refused outside commercial zones. Any two storey rear in Camden that goes below existing foundations triggers two months notice under section 6 of the Party Wall etc. Act 1996, and Camden Council will want the N1C ground and groundwater position set out.

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 two storey rear route in Camden — construction, not postcode, sets what is achievable.

What happens if a Camden property sits on a boundary?

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

Sources for this Camden two storey rear 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.