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The planning blog

Fresh, in-depth writing on permitted development, extensions, lofts, costs and getting drawings councils approve — from the team that draws them every week.

Isometric illustration of a London dormer loft conversion showing roof structure and extension
6 min read

Loft Conversion Cost London 2026

What does a loft conversion cost in London in 2026? We break down build-cost ranges for rooflight, dormer, hip-to-gable and mansard conversions, plus the planning and drawing costs that shape the final bill.

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Traditional London terraced house with a front porch extension subject to planning permission rules
6 min read

Porch Planning Permission

A concise guide to porch permitted development rules under the GPDO — the 3m², 3m height and 2m highway limits, listed building and conservation area caveats, and when a planning application is unavoidable.

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