I did mine as a house share agreement. Pretty much like a border more then a separate suite. Technically there should not be a door between the areas, but it could dissapear if it had to. I wrote up a contract and had it signed, agreeing to the house share and terms. It also states I have access at any time for utilities located in the suite, furnace and hot water tank. Also lots of Canadian house insurance companies gladly insure illegal suites for paying a little extra on your home insurance.