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Do I need building regulations for replacement windows?

Answer-first guide to replacement windows, competent person certificates, new openings, safety glazing, escape windows and evidence to keep.

Short answer

Replacement windows and doors may be covered by a competent person scheme, but you still need evidence. New openings or changed structure can need building control beyond installer self-certification.

What changes the answer

Safer next step

Use a registered installer for covered replacement work, or contact building control where structural openings or unusual changes are involved.

Open Windows and doors building regulations Use route checker Evidence to keep

Evidence checklist

Common questions

Does do i need building regulations for replacement windows? need building regulations approval?

Often yes, especially where the work changes structure, fire safety, insulation, ventilation, drainage, electrics or heating. The exact route depends on the specification and building control body.

Can planning permission and building regulations be separate?

Yes. Planning permission controls whether development is allowed in planning terms; building regulations deal with safety, energy, ventilation, drainage, structure and completion evidence.

What should I keep for sale or remortgage?

Keep the application reference, drawings, inspection notes, photos before work is covered, installer certificates and the completion certificate or equivalent evidence.

Next useful checks

Building Control Route Checker

Chooses likely next route: planning-first, full plans, building notice, competent person, regularisation, or specialist advice.