Basement under garden in Southwark

Which postcode districts around Southwark do we cover for basement under garden work?

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

What changes about a basement under garden in each part of Southwark?

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

• Rotherhithe (SE16) — warehouse conversions, riverside defines Rotherhithe, where warehouse conversions, post-war estates, new-build set what a basement under garden can do. Post-war slab foundations make basements here expensive and rarely viable across SE16. Any Rotherhithe basement under garden is validated by Southwark Council, with Surrey Quays the usual Rotherhithe reference point on the site plan.
• Elephant and Castle (SE1, SE17) — a basement under garden in Elephant and Castle starts from post-war estates, new-build towers, and Elephant and Castle reads as regenerated quarter, modernist origins. Post-war slab foundations make basements here expensive and rarely viable in SE1. Southwark Council assesses Elephant and Castle basement under gardens 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) — basement under garden work in Nunhead means victorian terraces. Nunhead is Victorian terraces around the cemetery. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged throughout SE15. Southwark Council decides the Nunhead application, and Nunhead Cemetery anchors the Nunhead location plan.
• Bermondsey (SE1, SE16) — basement under garden work in Bermondsey means warehouse conversions, georgian terraces, new-build. Bermondsey is warehouse conversions, Georgian fragments. Georgian houses here already have a vault and a lower-ground floor throughout SE1. Southwark Council decides the Bermondsey application, and Bermondsey Street anchors the Bermondsey location plan.
• Borough (SE1) — Georgian and Victorian terraces, market quarter defines Borough, where georgian and victorian terraces, warehouse conversions set what a basement under garden can do. Georgian houses here already have a vault and a lower-ground floor across SE1. Any Borough basement under garden is validated by Southwark Council, with Borough Market the usual Borough reference point on the site plan.
• Camberwell (SE5) — basement under garden work in Camberwell means georgian villas, victorian terraces. Camberwell is Georgian villas, Victorian terraces. Georgian houses here already have a vault and a lower-ground floor throughout SE5. Southwark Council decides the Camberwell application, and Camberwell Green anchors the Camberwell location plan.
• Peckham (SE15) — Victorian terraces, creative renewal defines Peckham, where victorian terraces, post-war estates set what a basement under garden can do. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged across SE15. Any Peckham basement under garden is validated by Southwark Council, with Peckham Rye the usual Peckham reference point on the site plan.

How do conservation areas and Article 4 affect a basement under garden in Southwark?

How designation changes a Southwark basement under garden: Southwark Council maintains 43 conservation areas, including Borough, Camberwell Grove, Bermondsey Street. Inside any of them a Southwark basement under garden 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.

Article 4 and your Southwark basement under garden: Article 4 for HMOs borough-wide; additional Article 4 for office-to-residential in Bermondsey and Elephant & Castle. At a SE1 address that matters twice over, because Southwark Council applies the direction unevenly across Southwark — we read the Southwark policies map for the exact SE1 address before quoting basement under gardens.

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 basement under garden route in Southwark more than the postcode does.

What happens if a Southwark property sits on a boundary?

• Bromley — the Bromley boundary runs against Southwark, so a basement under garden a street from Southwark is decided by Bromley Council instead. Bromley runs 48 conservation areas across BR1 and its neighbours, which is why basement under gardens priced for Southwark are re-checked against Bromley policy whenever the Southwark address sits on that edge.
• Tower Hamlets — the Tower Hamlets boundary runs against Southwark, so a basement under garden 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 basement under gardens priced for Southwark are re-checked against Tower Hamlets policy whenever the Southwark address sits on that edge.
• City of London — adjoining Southwark, with 27 conservation areas centred on EC1. A basement under garden on the far side of the Southwark line is determined by City of London Corporation, so the Southwark quote for basement under gardens is checked against City of London guidance before it is issued.
• Lambeth — the Lambeth boundary runs against Southwark, so a basement under garden a street from Southwark is decided by Lambeth Council instead. Lambeth runs 64 conservation areas across SE1 and its neighbours, which is why basement under gardens priced for Southwark are re-checked against Lambeth policy whenever the Southwark address sits on that edge.

Sources for this Southwark basement under garden 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.