Basement under garden in Wandsworth

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

Every Wandsworth postcode district we draw in, the stock that dominates it and the authority that validates a basement under garden there. Wandsworth 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 Wandsworth?

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

• Roehampton (SW15) — basement under garden work in Roehampton means post-war estates, georgian villas. Roehampton is Modernist post-war estates, Georgian fragments. Georgian houses here already have a vault and a lower-ground floor throughout SW15. Wandsworth Council decides the Roehampton application, and Alton Estate anchors the Roehampton location plan.
• Clapham Junction (SW11) — Victorian terraces, transport hub defines Clapham Junction, where victorian terraces, mansion blocks set what a basement under garden can do. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged across SW11. Any Clapham Junction basement under garden is validated by Wandsworth Council, with Clapham Junction station the usual Clapham Junction reference point on the site plan.
• Battersea (SW8, SW11) — a basement under garden in Battersea starts from victorian terraces, new-build apartments, and Battersea reads as Victorian terraces, riverside regen at Power Station. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in SW8. Wandsworth Council assesses Battersea basement under gardens against its own Battersea character guidance, and the location plan we draw for Battersea references Battersea Power Station.
• Balham (SW12) — Victorian and Edwardian terraces defines Balham, where victorian and edwardian terraces set what a basement under garden can do. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged across SW12. Any Balham basement under garden is validated by Wandsworth Council, with Balham High Road the usual Balham reference point on the site plan.
• Tooting (SW17) — Edwardian terraces, vibrant high street defines Tooting, where edwardian terraces set what a basement under garden can do. Edwardian houses rarely have a usable cellar across SW17. Any Tooting basement under garden is validated by Wandsworth Council, with Tooting Market the usual Tooting reference point on the site plan.
• Wandsworth Common (SW17, SW18) — a basement under garden in Wandsworth Common starts from victorian villas and terraces, and Wandsworth Common reads as Victorian villas around the common. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in SW17. Wandsworth Council assesses Wandsworth Common basement under gardens against its own Wandsworth Common character guidance, and the location plan we draw for Wandsworth Common references Wandsworth Common.
• Earlsfield (SW18) — Victorian terraced streets defines Earlsfield, where victorian terraces set what a basement under garden can do. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged across SW18. Any Earlsfield basement under garden is validated by Wandsworth Council, with Earlsfield station the usual Earlsfield reference point on the site plan.

Does Wandsworth planning policy restrict a basement under garden?

Wandsworth conservation designations: there are 45 across Wandsworth Council, Wandsworth Common, Clapham Common West, Tonsley among them. Designation costs a Wandsworth owner the permitted-development route: a basement under garden then needs a £548 householder application over 8 weeks, in place of the £249 prior approval route that takes 6 weeks. Nightingale Triangle is the Wandsworth designation that most often changes a basement under garden design.

Wandsworth and Article 4: Article 4 for HMO conversions covering the whole borough. A basement under garden planned at a SW11 address is checked against that direction first; Wandsworth Council publishes the Wandsworth extent, and the SW11 line rarely follows the Wandsworth boundary you would expect.

Wandsworth housing stock: Extensive Victorian terraced streets — the classic London side-return extension opportunity; Edwardian villas around the commons; 1930s semi-detached in Southfields. Family-oriented, high side-return extension and loft conversion rates; planning department experienced with Victorian terrace modifications. Read that before choosing a basement under garden route in Wandsworth — construction, not postcode, sets what is achievable.

Who decides a basement under garden on the edge of Wandsworth?

• Hammersmith and Fulham — the Hammersmith and Fulham boundary runs against Wandsworth, so a basement under garden a street from Wandsworth is decided by Hammersmith & Fulham Council instead. Hammersmith and Fulham runs 45 conservation areas across W6 and its neighbours, which is why basement under gardens priced for Wandsworth are re-checked against Hammersmith and Fulham policy whenever the Wandsworth address sits on that edge.
• Westminster — the Westminster boundary runs against Wandsworth, so a basement under garden a street from Wandsworth is decided by Westminster City Council instead. Westminster runs 56 conservation areas across SW1 and its neighbours, which is why basement under gardens priced for Wandsworth are re-checked against Westminster policy whenever the Wandsworth address sits on that edge.
• Lambeth — adjoining Wandsworth, with 64 conservation areas centred on SE1. A basement under garden on the far side of the Wandsworth line is determined by Lambeth Council, so the Wandsworth quote for basement under gardens is checked against Lambeth guidance before it is issued.
• Merton — cross the Wandsworth boundary and Merton Council takes the basement under garden instead, applying 28 conservation areas of its own around SW16. We re-price basement under gardens at the Wandsworth edge because Merton policy and Wandsworth policy rarely align on basement under garden depth.

Sources for this Wandsworth 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.