Why the timing matters
An inspection is most useful before concrete, plasterboard, flooring or backfill conceals the item being checked. Building control's visits are not continuous supervision and do not replace the contractor's own quality control. The builder should therefore identify inspection points in the programme rather than call only when a problem appears. [2] [3]
Typical extension stages
An agreed inspection schedule can include foundation excavations, foundations and floor construction, damp-proofing, drainage, structural supports and the relevant insulation or fire precautions before covering. The precise combination follows the design and site conditions. A published council inspection list is a starting point, not authority to omit an item your inspector has specifically requested. [1]
For work near a public sewer, coordinate the separate sewer company's requirements as well. Thames Water's approval and survey arrangements are not replaced by a building control visit. [4]
Typical loft conversion stages
The new floor, beams and roof alterations need checking alongside the stairs, fire protection, insulation and ventilation. Redbridge's loft guidance explains the interaction between these matters. A late change to the stair or structural layout should be coordinated with the design team before the next inspection. [5]
Keep structural supports and concealed fire details visible until the agreed checks have taken place. Arrange the relevant installation certificates and commissioning information as the services are completed, rather than discovering missing documents at handover. [1] [6]
Typical basement stages
Basements require a project-specific inspection sequence because structural work, groundwater protection and drainage are closely related. Redbridge identifies matters including structural stability, waterproofing, ventilation, drainage and escape. Agree inspection points with building control alongside the engineer's and waterproofing designer's own requirements. [7]
Those appointments have different purposes. A building control visit is not a substitute for specialist construction checks specified by the structural or waterproofing design. [2] [7]
Booking and recording visits
Ask who books, how much notice is required and what must be exposed. Local booking arrangements differ: Redbridge publishes a next-working-day service and a procedure for requesting an earlier visit. Record the inspector's comments and identify who will close out each outstanding item. [8]
The final inspection
Before requesting completion, review the remaining work, certificates and declarations with the project team. Physical completion and the issue of the statutory certificate are separate milestones. A final visit should be supported by a complete compliance record, not used as the first attempt to assemble it. [9] [6]