Basement Conversion Drawings in Lambeth

Which Lambeth postcodes does this basement conversion service cover?

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

Which Lambeth neighbourhoods suit a basement conversion best?

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

• Herne Hill (SE24) — a basement conversion in Herne Hill starts from victorian villas, edwardian terraces, and Herne Hill reads as Victorian villas around Brockwell Park. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in SE24. Lambeth Council assesses Herne Hill basement conversions against its own Herne Hill character guidance, and the location plan we draw for Herne Hill references Brockwell Park.
• Kennington (SE11) — a basement conversion in Kennington starts from georgian terraces, post-war estates, and Kennington reads as Georgian terraces, Regency squares. Georgian houses here already have a vault and a lower-ground floor in SE11. Lambeth Council assesses Kennington basement conversions against its own Kennington character guidance, and the location plan we draw for Kennington references Kennington Park.
• Streatham (SW16) — a basement conversion in Streatham starts from edwardian terraces, post-war flats, and Streatham reads as Edwardian terraces, post-war flats. Edwardian houses rarely have a usable cellar in SW16. Lambeth Council assesses Streatham basement conversions against its own Streatham character guidance, and the location plan we draw for Streatham references Streatham High Road.
• Stockwell (SW9) — a basement conversion in Stockwell starts from victorian terraces, post-war estates, and Stockwell reads as Victorian terraces, post-war estates. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in SW9. Lambeth Council assesses Stockwell basement conversions against its own Stockwell character guidance, and the location plan we draw for Stockwell references Stockwell station.
• Vauxhall (SE11, SW8) — Regency fragments, riverside new-build defines Vauxhall, where regency terraces, modern apartments, post-war flats set what a basement conversion can do. Post-war slab foundations make basements here expensive and rarely viable across SE11. Any Vauxhall basement conversion is validated by Lambeth Council, with Vauxhall Bridge the usual Vauxhall reference point on the site plan.
• West Norwood (SE27) — a basement conversion in West Norwood starts from victorian terraces, edwardian villas, and West Norwood reads as Victorian terraces, Edwardian villas. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in SE27. Lambeth Council assesses West Norwood basement conversions against its own West Norwood character guidance, and the location plan we draw for West Norwood references West Norwood Cemetery.
• Tulse Hill (SE27, SW2) — a basement conversion in Tulse Hill starts from victorian villas, edwardian terraces, and Tulse Hill reads as Victorian villas, Edwardian terraces. Victorian cellars here convert without planning permission when the footprint and external appearance are unchanged in SE27. Lambeth Council assesses Tulse Hill basement conversions against its own Tulse Hill character guidance, and the location plan we draw for Tulse Hill references Tulse Hill station.

How do conservation areas and Article 4 affect a basement conversion in Lambeth?

Conservation areas covering Lambeth: Lambeth Council runs 64, and Clapham Common, Herne Hill, Brixton Road are the ones Lambeth owners meet most. A basement conversion inside a Lambeth conservation area loses permitted development, so the Lambeth submission is a householder application at £548 decided in 8 weeks — not a £249 prior approval decided in 6 weeks. In Herne Hill a basement conversion is judged on the street elevation first.

Lambeth and Article 4: Borough-wide Article 4 for HMO conversions; plus office-to-residential restrictions. A basement conversion planned at a SE11 address is checked against that direction first; Lambeth Council publishes the Lambeth extent, and the SE11 line rarely follows the Lambeth boundary you would expect.

The building fabric around Lambeth: Victorian terraces in Clapham, Brixton, Herne Hill; Edwardian villas; 1930s and post-war estates in parts of Streatham; Georgian in Kennington. Mix of dense Victorian residential and post-war estate; strong conservation area coverage; generally design-led planning decisions. A basement conversion in Lambeth is scoped against that stock first, because it decides whether the scheme runs as permitted development, a £274 Lawful Development Certificate, or a full £548 application to Lambeth Council.

What happens if a Lambeth property sits on a boundary?

• Croydon — adjoining Lambeth, with 24 conservation areas centred on CR0. A basement conversion on the far side of the Lambeth line is determined by Croydon Council, so the Lambeth quote for basement conversions is checked against Croydon guidance before it is issued.
• Merton — cross the Lambeth boundary and Merton Council takes the basement conversion instead, applying 28 conservation areas of its own around SW16. We re-price basement conversions at the Lambeth edge because Merton policy and Lambeth policy rarely align on basement conversion depth.
• Westminster — adjoining Lambeth, with 56 conservation areas centred on SW1. A basement conversion on the far side of the Lambeth line is determined by Westminster City Council, so the Lambeth quote for basement conversions is checked against Westminster guidance before it is issued.
• Southwark — the Southwark boundary runs against Lambeth, so a basement conversion a street from Lambeth is decided by Southwark Council instead. Southwark runs 43 conservation areas across SE1 and its neighbours, which is why basement conversions priced for Lambeth are re-checked against Southwark policy whenever the Lambeth address sits on that edge.

Sources for this Lambeth basement conversion 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.