An older home can predate current placement rules even where the detectors themselves still work, so the check is not just whether a detector exists but whether it sits where today's code expects it and within its own service life. A unit past its printed expiry date can fail exactly when it is needed.
A legal secondary suite adds its own layer, since the City of Saskatoon's permit conditions for a suite typically set separate detector requirements from the main dwelling, so a permitted suite needs its own check rather than relying on the primary residence's devices.
Raising any gap in writing while your inspection condition is still open gives you a clear path to have it fixed before possession, rather than finding out after the keys change hands. Get your hand-reviewed valuation from Joel Dyck.