Planning permission articles
We publish practical planning guidance focused on the question that matters: what will happen for this exact property, in this exact borough, for this exact project.
Exact PD depth limits, the Larger Home Extension scheme, Article 4 restrictions, and how to check what applies at your specific address.
Hackney's Article 4 Directions, 30+ Conservation Areas, and strict design SPD make it one of London's most restrictive boroughs. Here's what that means for your project.
Build costs by extension type, professional fees, hidden costs, and a worked 25m² example — all based on 2026 London contractor rates.
The same extension can be approved in Wandsworth, scrutinised in Lambeth, and refused in Southwark. Here's exactly what to expect in each borough.
38 Conservation Areas, sweeping Article 4 Directions, and a strict design SPD make Camden one of London's most restrictive boroughs. Here's what homeowners need to know.
Croydon is one of outer London's most development-friendly boroughs. Larger plots, less Conservation Area coverage, and a pragmatic planning culture make most extensions straightforward.
Every PD rule for dormers explained — volume limits, the front-facing ban, Conservation Area restrictions, Article 4 coverage, and how to check your specific address.
Article 4 Directions remove Permitted Development rights at specific addresses. London uses them more than anywhere else in England. Here's what they are and how to check if you're covered.
A practical overview of how to get the right answer for your property and project.
What PD is, why it varies, and what commonly removes PD rights in London.
Common triggers for planning permission and what to check before designing dormers.