Joel Dyck negotiates that condition into an offer whenever a seller's next home is not ready on the same possession day, spelling out the daily rate, insurance responsibility and a hard move-out date. The mechanism Saskatchewan lawyers use is usually called an extended possession or occupancy agreement, built into the purchase contract before both lawyers finalize the file, per the Law Society of Saskatchewan's standard closing practice, rather than an open-ended handshake between buyer and seller.
Buyers do not have to agree to it, so a seller who knows in advance that their next home might not be ready should raise it during negotiation, not after an accepted offer, since a buyer with their own tight moving plans may simply say no.
Building in a possession cushion up front avoids a scramble at the very end of a sale. Get your hand-reviewed valuation from Joel Dyck.