Rear Dormer Loft Conversion Drawings in Lambeth

Which Lambeth postcodes does this rear dormer service cover?

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.

How does a rear dormer differ street by street across 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.

• 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) — rear dormer work in Streatham means edwardian terraces, post-war flats. Streatham is 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 throughout SW16. Lambeth Council decides the Streatham application, and Streatham High Road anchors the Streatham location plan.
• Stockwell (SW9) — a rear dormer in Stockwell starts from victorian terraces, post-war estates, and Stockwell reads as Victorian terraces, post-war estates. Full-width rear dormers on Victorian terraces here are the default in SW9. Lambeth Council assesses Stockwell rear dormers against its own Stockwell character guidance, and the location plan we draw for Stockwell references Stockwell station.
• Vauxhall (SE11, SW8) — a rear dormer in Vauxhall starts from regency terraces, modern apartments, post-war flats, and Vauxhall reads as Regency fragments, riverside new-build. Trussed post-war roofs need a full structural redesign before a dormer in SE11. Lambeth Council assesses Vauxhall rear dormers against its own Vauxhall character guidance, and the location plan we draw for Vauxhall references Vauxhall Bridge.
• West Norwood (SE27) — a rear dormer in West Norwood starts from victorian terraces, edwardian villas, and West Norwood reads as Victorian terraces, Edwardian villas. Full-width rear dormers on Victorian terraces here are the default in SE27. Lambeth Council assesses West Norwood rear dormers against its own West Norwood character guidance, and the location plan we draw for West Norwood references West Norwood Cemetery.
• Tulse Hill (SE27, SW2) — a rear dormer in Tulse Hill starts from victorian villas, edwardian terraces, and Tulse Hill reads as Victorian villas, Edwardian terraces. Full-width rear dormers on Victorian terraces here are the default in SE27. Lambeth Council assesses Tulse Hill rear dormers against its own Tulse Hill character guidance, and the location plan we draw for Tulse Hill references Tulse Hill station.
• Waterloo (SE1) — Georgian fragments, post-war estates, regen defines Waterloo, where georgian terraces, post-war flats, new-build 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 SE1. Any Waterloo rear dormer is validated by Lambeth Council, with Southbank Centre the usual Waterloo reference point on the site plan.

How do conservation areas and Article 4 affect a rear dormer in Lambeth?

How designation changes a Lambeth rear dormer: Lambeth Council maintains 64 conservation areas, including Streatham Hill, Clapham Common, Herne Hill. Inside any of them a Lambeth rear dormer cannot rely on permitted development, and the route becomes a £548 householder application determined in 8 weeks rather than a £249 prior approval in 6 weeks. Clapham Common sets the tone for Lambeth casework.

Lambeth and Article 4: Borough-wide Article 4 for HMO conversions; plus office-to-residential restrictions. A rear dormer planned at a SE11 address is checked against that direction first; Lambeth Council publishes the Lambeth extent, and the SE11 line rarely follows the Lambeth boundary you would expect.

Lambeth housing stock: 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. Read that before choosing a rear dormer route in Lambeth — construction, not postcode, sets what is achievable. Lambeth Council charges £548 for a householder application and has 8 weeks to determine it.

What happens if a Lambeth property sits on a boundary?

• Merton — the Merton boundary runs against Lambeth, so a rear dormer a street from Lambeth is decided by Merton Council instead. Merton runs 28 conservation areas across SW16 and its neighbours, which is why rear dormers priced for Lambeth are re-checked against Merton policy whenever the Lambeth address sits on that edge.
• 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 — cross the Lambeth boundary and Southwark Council takes the rear dormer instead, applying 43 conservation areas of its own around SE1. We re-price rear dormers at the Lambeth edge because Southwark policy and Lambeth policy rarely align on rear dormer depth.
• 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.

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.