Rear dormer loft in Lambeth

Which postcode districts around Lambeth do we cover for rear dormer work?

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

What changes about a rear dormer in each part of Lambeth?

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

• Tulse Hill (SE27, SW2) — Victorian villas, Edwardian terraces defines Tulse Hill, where victorian villas, edwardian terraces set what a rear dormer can do. Full-width rear dormers on Victorian terraces here are the default across SE27. Any Tulse Hill rear dormer is validated by Lambeth Council, with Tulse Hill station the usual Tulse Hill reference point on the site plan.
• Waterloo (SE1) — a rear dormer in Waterloo starts from georgian terraces, post-war flats, new-build, and Waterloo reads as Georgian fragments, post-war estates, regen. A dormer on a Georgian roof has to sit behind the parapet line to stand any chance of consent in SE1. Lambeth Council assesses Waterloo rear dormers against its own Waterloo character guidance, and the location plan we draw for Waterloo references Southbank Centre.
• Clapham (SW4) — a rear dormer in Clapham starts from victorian terraces, edwardian villas, and Clapham reads as Victorian terraces around the common. Full-width rear dormers on Victorian terraces here are the default in SW4. Lambeth Council assesses Clapham rear dormers against its own Clapham character guidance, and the location plan we draw for Clapham references Clapham Common.
• Brixton (SW2, SW9) — rear dormer work in Brixton means victorian terraces, post-war estates. Brixton is Victorian terraces, vibrant centre. Full-width rear dormers on Victorian terraces here are the default throughout SW2. Lambeth Council decides the Brixton application, and Brixton Market anchors the Brixton location plan.
• Herne Hill (SE24) — Victorian villas around Brockwell Park defines Herne Hill, where victorian villas, edwardian terraces set what a rear dormer can do. Full-width rear dormers on Victorian terraces here are the default across SE24. Any Herne Hill rear dormer is validated by Lambeth Council, with Brockwell Park the usual Herne Hill reference point on the site plan.
• Kennington (SE11) — Georgian terraces, Regency squares defines Kennington, where georgian terraces, post-war estates set what a rear dormer can do. A dormer on a Georgian roof has to sit behind the parapet line to stand any chance of consent across SE11. Any Kennington rear dormer is validated by Lambeth Council, with Kennington Park the usual Kennington reference point on the site plan.
• Streatham (SW16) — a rear dormer in Streatham starts from edwardian terraces, post-war flats, and Streatham reads as Edwardian terraces, post-war flats. The deeper Edwardian rear slope takes a full-width dormer without breaching the 40 m³ or 50 m³ volume limits on most of these houses in SW16. Lambeth Council assesses Streatham rear dormers against its own Streatham character guidance, and the location plan we draw for Streatham references Streatham High Road.

Does Lambeth planning policy restrict a rear dormer?

Lambeth conservation designations: there are 64 across Lambeth Council, Brockwell Park, Streatham Hill, Clapham Common among them. Designation costs a Lambeth owner the permitted-development route: a rear dormer then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Brockwell Park is the Lambeth designation that most often changes a rear dormer design.

Article 4 and your Lambeth rear dormer: Borough-wide Article 4 for HMO conversions; plus office-to-residential restrictions. At a SE11 address that matters twice over, because Lambeth Council applies the direction unevenly across Lambeth — we read the Lambeth policies map for the exact SE11 address before quoting rear dormers.

What Lambeth is built from: Victorian terraces in Clapham, Brixton, Herne Hill; Edwardian villas; 1930s and post-war estates in parts of Streatham; Georgian in Kennington. Mix of dense Victorian residential and post-war estate; strong conservation area coverage; generally design-led planning decisions. That mix decides the rear dormer route in Lambeth more than the postcode does.

Who decides a rear dormer on the edge of Lambeth?

• Westminster — the Westminster boundary runs against Lambeth, so a rear dormer a street from Lambeth is decided by Westminster City Council instead. Westminster runs 56 conservation areas across SW1 and its neighbours, which is why rear dormers priced for Lambeth are re-checked against Westminster policy whenever the Lambeth address sits on that edge.
• Southwark — adjoining Lambeth, with 43 conservation areas centred on SE1. A rear dormer on the far side of the Lambeth line is determined by Southwark Council, so the Lambeth quote for rear dormers is checked against Southwark guidance before it is issued.
• Wandsworth — cross the Lambeth boundary and Wandsworth Council takes the rear dormer instead, applying 45 conservation areas of its own around SW8. We re-price rear dormers at the Lambeth edge because Wandsworth policy and Lambeth policy rarely align on rear dormer depth.
• Croydon — adjoining Lambeth, with 24 conservation areas centred on CR0. A rear dormer on the far side of the Lambeth line is determined by Croydon Council, so the Lambeth quote for rear dormers is checked against Croydon guidance before it is issued.

Sources for this Lambeth rear dormer 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.