The requirements that matter are the same ones any City of Saskatoon secondary suite permit checks: a separate entrance in many cases, proper egress in case of fire, adequate ceiling height and fire separation from the rest of the house.
None of that shows up on an application named after a different city's process, so searching for an ATR form locally will not get you anywhere. The right first call is the City of Saskatoon's building standards branch, which confirms whether your specific basement layout can meet the code before you spend money on the renovation.
A permit-backed suite adds real, defensible value against a benchmark price of $444,700; an unpermitted one is exactly the kind of improvement public records and online estimates miss. Get your hand-reviewed valuation from Joel Dyck.