Article 4 directions in Cornwall
These remove specific permitted development rights in defined areas. Check whether your street is inside one before relying on the national limits.
Cornwall Council hasn’t published any Article 4 directions to the national planning data platform. That doesn’t mean there are none — check the council’s website (cornwall.gov.uk).
From planning.data.gov.uk, Sep 2026. Councils publish at different levels of detail — confirm the scope of any direction with Cornwall Council.
Conservation areas
Each links to its own page: boundary map, what it changes, and the council’s appraisal.
What you can build in Cornwall
The national limits for a semi-detached house with full permitted development rights. Inside a conservation area or Article 4 area, some of these need planning permission.
Getting a Lawful Development Certificate from Cornwall Council
Apply through the Planning Portal. Decisions usually take up to 8 weeks. Your report tells you whether you need one — and includes the drawings checklist.
Cornwall Council website ↗Nearby councils