Whatever the scope, expect a building permit through the City of Saskatoon, possibly a design or engineering consultation for structural work, and the construction itself covering items like egress windows, ceiling height, fire separation and a separate entrance where required. A home inspection beforehand, typically $400 to $600, is a reasonable way to scope the gap before quoting the job.
If a lawyer needs to review or register anything related to the property as part of the process, legal fees in Saskatchewan typically run $800 to $1,500, though most straightforward legalizations do not need a lawyer at all.
Get a written quote against your specific basement's condition before you plan around a number, since two houses with the same square footage can need completely different work. Get your hand-reviewed valuation from Joel Dyck.