Lambeth covers Brixton, Stockwell, Clapham, Streatham, Herne Hill, and West Norwood. The borough has an active conservation area programme and a significant number of Article 4 directions for HMOs. Victorian terraces predominate across most residential streets, and permitted development rights apply fully in many parts of the borough — though conservation area coverage in Clapham Old Town, Stockwell, and Herne Hill brings additional scrutiny.
Common projects that may be straightforward when they fit within PD limits and local constraints.
These are the usual reasons planning permission becomes more likely in Lambeth.
The biggest drivers of approval are the exact proposal (dimensions and design) and the exact site constraints (designation, conditions, neighbour impacts). Use borough context as a starting point, then validate it with address-level checks and nearby precedents.
Projects that stay modest in size, match materials, and avoid obvious neighbour impacts are more likely to be straightforward — even before you consider borough-specific policies.
Conservation areas, listed buildings, Article 4 directions, flood risk and TPOs can flip the answer. Address-level checks stop you wasting money on the wrong scheme.
The fastest signal is what the council has approved or refused on comparable streets nearby. Precedent does not guarantee success, but it helps you shape a lower-risk design.
Councils rarely refuse the "idea" of an extension or loft conversion — refusals are usually about scale, design, neighbour impacts, and policy/designation conflicts. When you run a check, CanUBuild shows nearby approvals and refusals so you can see what has worked locally.
An invalid application cannot be registered. Use this checklist to ensure your submission is complete before you pay the fee.
Requirements can change — always verify the current validation checklist on the Lambeth Council website before submitting.
Search the address, choose your project type, and get an answer based on permitted development rules, local constraints, and nearby precedent decisions.
Many loft conversions on houses in Lambeth can be permitted development — especially rear dormers within the volume and height limits on properties not in a conservation area. However, the borough has significant conservation area coverage, and any roof change on a conservation area property typically requires planning permission.
In designated wards, changing a property's use from a family home (C3) to a small house of multiple occupation (C4) requires planning permission — the permitted development right that normally allows this change is removed by the Article 4 direction.
Possibly. If the property is a house (not a flat), not in a conservation area, not listed, and the extension stays within PD limits, you may not need formal planning permission — though a Lawful Development Certificate is advisable. Check your address constraints first.
Yes — the standard national planning fee applies. A householder application for a single dwelling extension costs £258 (as at 2026, subject to change). The CanUBuild checker can help you understand whether you need a formal application at all, before you commit to that cost.
Last reviewed: 2026-03 · This guide is for general information only. Always verify with Lambeth Council or a qualified planning consultant before making decisions.