From the above stages
Loft 1 / Extension 1 Notification
Loft 2 / Extension 2 Inspection
Loft 3 / Extension 3 Inspection
Loft 4 / Extension 4 Inspection
Extension 5 Inspection
Loft 5 / Extension 6 Notification of Completion
N.B. 1 additional inspection has been allowed for at the start or end to suit.
Installer certificates required: Electrical, Unvented cylinder, Gas appliance
File Photo required: Damp proof membrane to ground floor slab