But you can build any house you want on unincorporated land (no municipality).
This is Canada. There are no municipalities in the Constitution. There is no land that is not controlled by the government.
Docks are also regulated because of their ecological impact and safety.
I was kind of shocked by your comment so I googled to make sure. Here is an article saying the same things.
https://cottagelife.com/realestate/inspections-in-unincorpor...
But you can build any house you want on unincorporated land (no municipality).