What every application needs regardless of timeline is a building permit before the work starts, since the City of Saskatoon will not sign off on a secondary suite after the fact, and lenders will not count rental income from a suite that was never permitted in the first place.
That lender point matters most for anyone counting on the suite to help finance a purchase or add value at resale. A permitted suite counts toward a home's income and market value, while an unpermitted one, even a well-built one, can add close to nothing on paper, and it may complicate a buyer's inspection, typically $400 to $600, if the missing paperwork surfaces during that visit.
Budget for a process measured in weeks to a few months rather than days, and start the permit conversation before you start the construction, not after. Get your hand-reviewed valuation from Joel Dyck.