Alterations to extend or create a basement
- Stage 1: commencement, may be combined with stage 2 - minimum two days notice.
- Stage 2: inspection of new underpins foundations to sequence - minimum one day notice.
- Stage 3: inspection of oversite, may combine with stage 4.
- Stage 4: inspection of damp-proof membrane for new floor.
- Stage 5: inspection of any new walls DPC and foul and surface affected drains.
- Stage 6: inspection of structural works.
- Stage 7: inspect drainage connections, if any, above ground including witness of drain tests.
- Stage 8: completion - minimum one day notice and combined with stage 8 if all OK. Includes fire safety measures of:
- means of escape provisions in the event of fire
- ventilation
- installer certificates, for example as electrical and gas