Saskatchewan uses possession day rather than a closing date, and the final walkthrough happens on the buyer's side of that possession, separate from the lawyer's work, typically $800 to $1,500 in fees, at Information Services Corporation registering title, so it is a physical check of the house, not a legal step.
What buyers actually check is specific: appliances and fixtures named in the offer are still there, no new damage has appeared, agreed repairs are done, and the home is left broom-swept, since Saskatchewan offers do not typically include the seller's furniture or belongings unless listed.
A problem found at the final walkthrough gets resolved through the lawyers before possession, usually with a holdback from the sale proceeds, rather than after the buyer already has the keys. Get your hand-reviewed valuation from Joel Dyck.