what do I need to have to hand when the above takes place and should I be mindful of any particular aspects of the extension given that all prior inspections have been passed?
Knowing some of our inspectors, it will consist of checking that your extension has walls and a roof. Oh, and windows that have escape openings. That's all they can check, really, as everything will have been plastered over.
What about gas safe and electricity certificates? Is it also compulsory to have trickle vents on the windows? I assumed that there are a series of things that are checked as part of this...
Yes, they will want copies of certificates; they will check windows are double glazed (were they FENSA installed?). Not compulsory to have trickle vents in the windows, but there is a requirement for some background ventilation eg via an air brick.
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