The whole National Park is “Article 2(3) land”
Every house inside Exmoor National Park has narrower permitted development rights: no side extensions, two-storey rear extensions, dormer loft conversions or cladding without planning permission, no prior approval route for larger rear extensions, and garden buildings more than 20 m from the house are capped at 10 m². What Article 2(3) land means →
Article 4 directions in Exmoor National Park
These remove specific permitted development rights in defined areas. Check whether your street is inside one before relying on the national limits.
Exmoor National Park 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 (exmoor-nationalpark.gov.uk).
From planning.data.gov.uk, Sep 2026. Councils publish at different levels of detail — confirm the scope of any direction with Exmoor National Park.
Conservation areas
Each links to its own page: boundary map, what it changes, and the council’s appraisal.
What you can build in Exmoor National Park
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 Exmoor National Park
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.
Exmoor National Park Authority website ↗Nearby councils