An appraiser or agent using the income approach needs a permit on file through the City of Saskatoon and verifiable rent to support the added value. An income unit with neither is exactly the kind of improvement a standard comparative report misses, since it exists in the house but not in the public record.
Caswell Hill's older housing stock means the mechanical systems serving both the main house and the suite, furnace, electrical, plumbing, get weighed alongside the rent itself, since a suite that generates income but strains an aging system is worth less than one that does not.
Getting a real number means walking the unit and its systems, not just totalling the rent. Get your hand-reviewed valuation from Joel Dyck.