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What are the permits and building regulations for a loft conversion?

What are the permits and building regulations for a loft conversion?

All loft conversions require building regulations approval before they can be carried out. However, in the case of planned permission, it is only needed for conversions in a conservation area or listed building. You also need permission if you’re altering the roof shape or height. Additions of 40m³ for a terraced home and 50³ for other homes fall under permitted development.