Which postcode districts around Southwark do we cover for rear dormer work?
Every Southwark postcode district we draw in, the stock that dominates
it and the authority that validates a rear dormer there. Southwark fees below are the
statutory England rates for 2026, not rear dormer estimates.
| Postcode | Area | Dominant stock | What it means for a rear dormer |
|---|
| SE1 | Bermondsey / Borough / Waterloo | Georgian terraces, post-war flats, new-build | Bermondsey / Borough / Waterloo is split at SE1. Either Southwark Council or Lambeth Council can determine a rear dormer here, so the SE1 address is checked against both policies maps first. |
| SE5 | Camberwell | Georgian villas, Victorian terraces | A rear dormer in Camberwell may land with Southwark Council or Lambeth Council — SE5 crosses the boundary, and the SE5 policies map decides it street by street. |
| SE15 | Peckham / Nunhead | Victorian terraces, post-war estates | Peckham / Nunhead sits wholly inside SE15, so Southwark Council validates every rear dormer submitted from an SE15 address. |
| SE16 | Bermondsey / Rotherhithe | Warehouse conversions, Georgian terraces, new-build | SE16 covers Bermondsey / Rotherhithe only; Southwark Council handles the rear dormer. |
| SE17 | Walworth | Post-war estates, new-build towers | SE17 covers Walworth only; Southwark Council handles the rear dormer. |
| SE21 | Dulwich Village | Georgian villas, Edwardian villas (Dulwich Estate) | A rear dormer in Dulwich Village may land with Southwark Council or Lambeth Council — SE21 crosses the boundary, and the SE21 policies map decides it street by street. |
| SE22 | East Dulwich | Victorian and Edwardian terraces | East Dulwich sits wholly inside SE22, so Southwark Council validates every rear dormer submitted from an SE22 address. |
| SE24 | Herne Hill | Victorian villas, Edwardian terraces | A rear dormer in Herne Hill may land with Lambeth Council or Southwark Council — SE24 crosses the boundary, and the SE24 policies map decides it street by street. |
Which Southwark neighbourhoods suit a rear dormer best?
Roof pitch, wall build-up and plot depth change every few Southwark
streets, and each one changes what a rear dormer can achieve at that address.
- Dulwich Village (SE21) — rear dormer work in Dulwich Village means georgian villas, edwardian villas (dulwich estate). Dulwich Village is Georgian and Edwardian villas, Estate-managed. A dormer on a Georgian roof has to sit behind the parapet line to stand any chance of consent throughout SE21. Southwark Council decides the Dulwich Village application, and Dulwich Picture Gallery anchors the Dulwich Village location plan.
- East Dulwich (SE22) — a rear dormer in East Dulwich starts from victorian and edwardian terraces, and East Dulwich reads as Victorian and Edwardian terraces. Full-width rear dormers on Victorian terraces here are the default in SE22. Southwark Council assesses East Dulwich rear dormers against its own East Dulwich character guidance, and the location plan we draw for East Dulwich references Lordship Lane.
- Rotherhithe (SE16) — a rear dormer in Rotherhithe starts from warehouse conversions, post-war estates, new-build, and Rotherhithe reads as warehouse conversions, riverside. Trussed post-war roofs need a full structural redesign before a dormer in SE16. Southwark Council assesses Rotherhithe rear dormers against its own Rotherhithe character guidance, and the location plan we draw for Rotherhithe references Surrey Quays.
- Elephant and Castle (SE1, SE17) — a rear dormer in Elephant and Castle starts from post-war estates, new-build towers, and Elephant and Castle reads as regenerated quarter, modernist origins. Trussed post-war roofs need a full structural redesign before a dormer in SE1. Southwark Council assesses Elephant and Castle rear dormers against its own Elephant and Castle character guidance, and the location plan we draw for Elephant and Castle references Elephant and Castle station.
- Nunhead (SE15) — Victorian terraces around the cemetery defines Nunhead, where victorian terraces set what a rear dormer can do. Full-width rear dormers on Victorian terraces here are the default across SE15. Any Nunhead rear dormer is validated by Southwark Council, with Nunhead Cemetery the usual Nunhead reference point on the site plan.
- Bermondsey (SE1, SE16) — rear dormer work in Bermondsey means warehouse conversions, georgian terraces, new-build. Bermondsey is warehouse conversions, Georgian fragments. A dormer on a Georgian roof has to sit behind the parapet line to stand any chance of consent throughout SE1. Southwark Council decides the Bermondsey application, and Bermondsey Street anchors the Bermondsey location plan.
- Borough (SE1) — rear dormer work in Borough means georgian and victorian terraces, warehouse conversions. Borough is Georgian and Victorian terraces, market quarter. A dormer on a Georgian roof has to sit behind the parapet line to stand any chance of consent throughout SE1. Southwark Council decides the Borough application, and Borough Market anchors the Borough location plan.
How do conservation areas and Article 4 affect a rear dormer in Southwark?
Southwark conservation designations: there are 43 across Southwark Council, Bermondsey Street, Dulwich Village, Peckham Rye among them. Designation costs a Southwark 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. Peckham Rye is the Southwark designation that most often changes a rear dormer design.
Southwark and Article 4: Article 4 for HMOs borough-wide; additional Article 4 for office-to-residential in Bermondsey and Elephant & Castle. A rear dormer planned at a SE1 address is checked against that direction first; Southwark Council publishes the Southwark extent, and the SE1 line rarely follows the Southwark boundary you would expect.
What Southwark is built from: Georgian and Regency in Bermondsey and Borough; Victorian terraces in Camberwell and Peckham; Dulwich Estate controlled housing; riverside new-build. Dulwich Estate private planning scheme affects much of SE21 and SE22; Southwark planning for rest of borough; strong heritage context. That mix decides the rear dormer route in Southwark more than the postcode does.
Who decides a rear dormer on the edge of Southwark?
- Lewisham — adjoining Southwark, with 30 conservation areas centred on SE3. A rear dormer on the far side of the Southwark line is determined by Lewisham Council, so the Southwark quote for rear dormers is checked against Lewisham guidance before it is issued.
- Bromley — adjoining Southwark, with 48 conservation areas centred on BR1. A rear dormer on the far side of the Southwark line is determined by Bromley Council, so the Southwark quote for rear dormers is checked against Bromley guidance before it is issued.
- Tower Hamlets — the Tower Hamlets boundary runs against Southwark, so a rear dormer a street from Southwark is decided by Tower Hamlets Council instead. Tower Hamlets runs 58 conservation areas across E1 and its neighbours, which is why rear dormers priced for Southwark are re-checked against Tower Hamlets policy whenever the Southwark address sits on that edge.
- City of London — the City of London boundary runs against Southwark, so a rear dormer a street from Southwark is decided by City of London Corporation instead. City of London runs 27 conservation areas across EC1 and its neighbours, which is why rear dormers priced for Southwark are re-checked against City of London policy whenever the Southwark address sits on that edge.
Sources for this Southwark 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.
