Building regulations documents to keep

Short answer

Keep a project file that proves what route was chosen, what was inspected, who certified controlled services, and what evidence was available before work was covered up. Missing records can become a sale, remortgage or future-alteration problem.

Documents and evidence to keep

• Application reference or initial notice
• Approved plans or building notice acknowledgement
• Structural calculations and drawings
• Inspection records and dated site photos
• Competent person certificates
• Completion certificate or final acceptance
• Product data, commissioning records and warranties

How to build a stronger file

Keep evidence while the work is happening, not months later. The strongest file usually has a simple timeline: what was proposed, which route was chosen, who designed or certified each part, what building control inspected, and what was handed over at completion.

Photos matter most when they show work before it is covered: excavation depth, drainage runs, beam bearings, insulation, fire-stopping, ventilation routes and service trenches. Label them with the date and the stage so they are useful to a surveyor, conveyancer, building control officer or future buyer.

Questions to settle early

• Who will submit or manage the building regulations application?
• Which parts are being self-certified by a registered installer?
• Which inspection stages must happen before work is covered?
• Which final certificates should exist before the last payment?
• Which planning permission or lawful development records should sit beside the building regulations file?

When to ask before relying on old paperwork

Ask building control, your conveyancer or a competent professional where work is historic, certificates are missing, the work affects structure or fire safety, or the only evidence is a builder's verbal assurance.

Next action

Use the printable checklist and local dashboard to keep the evidence trail together.

Next useful checks