That approval sets requirements for parking, separate entrances in many cases and building code compliance before a suite counts as legal, and Joel Dyck checks for that permit record on every listing that claims a secondary suite. The distinction that matters to a lender or appraiser is permit status, not finish quality, since the City of Saskatoon inspects a secondary suite for things like egress windows, ceiling height and fire separation before signing off, and an unpermitted space can look identical in photos while carrying none of that value.
A detached backyard version, sometimes called a garden suite, faces its own setback and servicing rules under the same bylaw, and lot size and existing structures decide whether one is even physically possible before legality becomes the question.
Whether a suite adds real value depends entirely on whether it is legal, which is exactly the kind of detail an online estimate cannot see. Get your hand-reviewed valuation from Joel Dyck.