Building Regulations FAQs

Planning permission controls what you can build and where, based on its appearance and impact on the surrounding area. Building Regulations control how you build — ensuring structural safety, fire safety, energy efficiency, accessibility, and electrical/plumbing safety. You can need both, either, or neither depending on the project. Most structural and significant renovation works need Building Regulations approval even if planning permission is not required.

Yes. All loft conversions require Building Regulations approval. This covers structural calculations for new beams and floor, fire safety (fire doors on each floor, escape windows), insulation standards (Part L), and staircase design. Your builder or architect will submit a Full Plans application or Building Notice, and a Building Control Officer will inspect at various stages.

You can apply via your local authority (Camden or Westminster Building Control) or through an approved private inspector. A "Full Plans" application is submitted before work begins and inspected at key stages. A "Building Notice" allows work to proceed quickly but with inspections confirming compliance. On completion, you receive a Completion Certificate — keep this safe as it is required when selling.

Unpermitted work creates a "regularisation" problem. You may need a Regularisation Certificate (retrospective approval from Building Control) or face enforcement action for dangerous work. Without certificates, you will face difficulties selling your property. Mortgage lenders and solicitors routinely request Building Regulations Completion Certificates for any work done after 1985.

A straightforward kitchen replacement (like-for-like) generally does not need Building Regulations approval. However, a new gas connection does (Gas Safe registration handles this). Any structural wall removal requires approval. Moving a boiler requires approval. New or relocated drainage requires approval. The installer or builder should advise based on the specific scope.

Camden Building Control aim to respond to Full Plans applications within 5 weeks (statutory 5-week period). In practice, straightforward applications are often approved within 3 weeks. Inspections are booked online and typically happen within 24–48 hours of request. Final Completion Certificates are issued after the final inspection confirms all work meets Building Regulations.