House Extension Drawings in Southwark

Which postcode districts around Southwark do we cover for house extension work?

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

What changes about a house extension in each part of Southwark?

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

• Nunhead (SE15) — house extension work in Nunhead means victorian terraces. Nunhead is Victorian terraces around the cemetery. 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 SE15. Southwark Council decides the Nunhead application, and Nunhead Cemetery anchors the Nunhead location plan.
• Bermondsey (SE1, SE16) — house extension work in Bermondsey means warehouse conversions, georgian terraces, new-build. Bermondsey is warehouse conversions, Georgian fragments. Georgian rear elevations here are usually the listed or locally listed face of the building throughout SE1. Southwark Council decides the Bermondsey application, and Bermondsey Street anchors the Bermondsey location plan.
• Borough (SE1) — a house extension in Borough starts from georgian and victorian terraces, warehouse conversions, and Borough reads as Georgian and Victorian terraces, market quarter. Georgian rear elevations here are usually the listed or locally listed face of the building in SE1. Southwark Council assesses Borough house extensions against its own Borough character guidance, and the location plan we draw for Borough references Borough Market.
• Camberwell (SE5) — Georgian villas, Victorian terraces defines Camberwell, where georgian villas, victorian terraces set what a house extension can do. Georgian rear elevations here are usually the listed or locally listed face of the building across SE5. Any Camberwell house extension is validated by Southwark Council, with Camberwell Green the usual Camberwell reference point on the site plan.
• Peckham (SE15) — a house extension in Peckham starts from victorian terraces, post-war estates, and Peckham reads as Victorian terraces, creative renewal. 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 SE15. Southwark Council assesses Peckham house extensions against its own Peckham character guidance, and the location plan we draw for Peckham references Peckham Rye.
• Dulwich Village (SE21) — a house extension in Dulwich Village starts from georgian villas, edwardian villas (dulwich estate), and Dulwich Village reads as Georgian and Edwardian villas, Estate-managed. Georgian rear elevations here are usually the listed or locally listed face of the building in SE21. Southwark Council assesses Dulwich Village house extensions against its own Dulwich Village character guidance, and the location plan we draw for Dulwich Village references Dulwich Picture Gallery.
• East Dulwich (SE22) — a house extension in East Dulwich starts from victorian and edwardian terraces, and East Dulwich reads as Victorian and Edwardian 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 SE22. Southwark Council assesses East Dulwich house extensions against its own East Dulwich character guidance, and the location plan we draw for East Dulwich references Lordship Lane.

How do conservation areas and Article 4 affect a house extension in Southwark?

How designation changes a Southwark house extension: Southwark Council maintains 43 conservation areas, including Bermondsey Street, Dulwich Village, Peckham Rye. Inside any of them a Southwark house extension 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. Bermondsey Street sets the tone for Southwark casework.

What Article 4 removes near Southwark: Article 4 for HMOs borough-wide; additional Article 4 for office-to-residential in Bermondsey and Elephant & Castle. Before pricing a house extension we check whether the SE1 address is inside the mapped area, because Southwark Council draws the Southwark boundary street by street rather than across the whole of Southwark.

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 house extension route in Southwark more than the postcode does, and it is what a Southwark Council case officer reads first. A householder application costs £548 paid to Southwark Council direct, with 8 weeks to a decision once validated.

Which neighbouring authorities border Southwark?

• Lambeth — the Lambeth boundary runs against Southwark, so a house extension a street from Southwark is decided by Lambeth Council instead. Lambeth runs 64 conservation areas across SE1 and its neighbours, which is why house extensions priced for Southwark are re-checked against Lambeth policy whenever the Southwark address sits on that edge.
• Lewisham — cross the Southwark boundary and Lewisham Council takes the house extension instead, applying 30 conservation areas of its own around SE3. We re-price house extensions at the Southwark edge because Lewisham policy and Southwark policy rarely align on house extension depth.
• Bromley — adjoining Southwark, with 48 conservation areas centred on BR1. A house extension on the far side of the Southwark line is determined by Bromley Council, so the Southwark quote for house extensions is checked against Bromley guidance before it is issued.
• Tower Hamlets — adjoining Southwark, with 58 conservation areas centred on E1. A house extension on the far side of the Southwark line is determined by Tower Hamlets Council, so the Southwark quote for house extensions is checked against Tower Hamlets guidance before it is issued.

Sources for this Southwark house extension 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.