Rear Dormer Loft Conversion Drawings in Merton

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

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

How does a rear dormer differ street by street across Merton?

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

• Wimbledon (SW19, SW20) — a rear dormer in Wimbledon starts from victorian villas, edwardian terraces, and Wimbledon reads as Victorian villas, Edwardian terraces. Full-width rear dormers on Victorian terraces here are the default in SW19. Merton Council assesses Wimbledon rear dormers against its own Wimbledon character guidance, and the location plan we draw for Wimbledon references All England Club.
• Wimbledon Village (SW19) — Georgian and Victorian village conservation defines Wimbledon Village, where georgian and victorian villas 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 SW19. Any Wimbledon Village rear dormer is validated by Merton Council, with Wimbledon Village High Street the usual Wimbledon Village reference point on the site plan.
• Raynes Park (SW20) — 1930s semi-detached, Edwardian terraces defines Raynes Park, where 1930s semi-detached, edwardian terraces set what a rear dormer can do. 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 across SW20. Any Raynes Park rear dormer is validated by Merton Council, with Raynes Park station the usual Raynes Park reference point on the site plan.
• Morden (SM4) — rear dormer work in Morden means 1930s semi-detached, post-war flats. Morden is 1930s semi-detached, post-war flats. Hip-to-gable plus rear dormer is the standard sequence on these 1930s semis throughout SM4. Merton Council decides the Morden application, and Morden Tube anchors the Morden location plan.
• Mitcham (CR4) — rear dormer work in Mitcham means 1930s semi-detached, post-war estates. Mitcham is 1930s semi-detached, post-war estates. Hip-to-gable plus rear dormer is the standard sequence on these 1930s semis throughout CR4. Merton Council decides the Mitcham application, and Mitcham Cricket Green anchors the Mitcham location plan.
• Colliers Wood (SW19) — Edwardian terraces, post-war flats defines Colliers Wood, where edwardian terraces, post-war flats set what a rear dormer can do. 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 across SW19. Any Colliers Wood rear dormer is validated by Merton Council, with Colliers Wood Tube the usual Colliers Wood reference point on the site plan.
• South Wimbledon (SW19) — Edwardian terraces defines South Wimbledon, where edwardian terraces set what a rear dormer can do. 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 across SW19. Any South Wimbledon rear dormer is validated by Merton Council, with South Wimbledon Tube the usual South Wimbledon reference point on the site plan.

Does Merton planning policy restrict a rear dormer?

How designation changes a Merton rear dormer: Merton Council maintains 28 conservation areas, including Mitcham Cricket Green, Wimbledon Common, Wimbledon Village. Inside any of them a Merton 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. Wimbledon Village sets the tone for Merton casework.

Article 4 and your Merton rear dormer: Merton Council has made no borough-wide direction, so permitted development for a rear dormer in Merton generally survives outside Merton conservation areas and listed curtilages. A Lawful Development Certificate at £274 is how a SW19 owner records that a rear dormer was lawful.

Merton housing stock: Victorian villas in Wimbledon; Edwardian terraces in Tooting and Colliers Wood; 1930s semi-detached in Morden and Raynes Park; post-war flats in Mitcham. Wimbledon is heavily conservation-controlled; outer Merton (Morden, Mitcham) is permissive. Read that before choosing a rear dormer route in Merton — construction, not postcode, sets what is achievable. Merton Council charges £548 for a householder application and has 8 weeks to determine it.

What happens if a Merton property sits on a boundary?

• Croydon — adjoining Merton, with 24 conservation areas centred on CR0. A rear dormer on the far side of the Merton line is determined by Croydon Council, so the Merton quote for rear dormers is checked against Croydon guidance before it is issued.
• Sutton — the Sutton boundary runs against Merton, so a rear dormer a street from Merton is decided by Sutton Council instead. Sutton runs 17 conservation areas across SM1 and its neighbours, which is why rear dormers priced for Merton are re-checked against Sutton policy whenever the Merton address sits on that edge.
• Kingston upon Thames — the Kingston upon Thames boundary runs against Merton, so a rear dormer a street from Merton is decided by Kingston Council instead. Kingston upon Thames runs 22 conservation areas across KT1 and its neighbours, which is why rear dormers priced for Merton are re-checked against Kingston upon Thames policy whenever the Merton address sits on that edge.
• Wandsworth — cross the Merton 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 Merton edge because Wandsworth policy and Merton policy rarely align on rear dormer depth.

Sources for this Merton 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.