What occasionally gets described as multi-family in Briarwood is a large executive home with a legal secondary suite rather than a purpose-built duplex or fourplex, and the City of Saskatoon's permit record decides whether that suite counts toward value at all.
Up to four units, a lender still works from comparable sales adjusted for rent. A larger building would need a report from an Appraisal Institute of Canada designated appraiser based on net operating income, and that kind of comparable simply does not exist in Briarwood in meaningful numbers.
Joel Dyck confirms what is actually legal and built before pricing anything described as multi-family in a neighbourhood this thin on comparables. Get your hand-reviewed valuation from Joel Dyck.