Which consent rule are you under?

No. It is a plain-English walk through MBIE's own tests, and MBIE's flow chart carries its own caveat that it "is a guide only and may be applied differently to different situations". Confirm your path with a design professional and your council before you spend money.

No. The checker runs in your browser and there is no email field. We record which of the results people land on, and nothing else.

Because that one answer rules several exemptions in or out. MBIE says detached buildings built under Schedule 1 "cannot contain sanitary facilities or facilities for the storage of potable water", so a bathroom moves you to Schedule 1A or a building consent.

Because the Building Act only treats a vehicle as a building when it is immovable and occupied long-term. MBIE weighs seven things for immovability, and whether anything would have to be deconstructed to move it is one of the clearest.

It says which exemption appears to apply, which is not the same thing. Every exemption has conditions attached, the Building Code still applies in full, and your district plan is a separate question that this checker does not answer.