Condition issues surface next, usually at the buyer's own home inspection, typically $400 to $600. A furnace, roof or electrical panel that needs attention does not necessarily kill a deal, but it gives a buyer room to renegotiate or walk, and that renegotiation is what stretches a sale out.
Unpermitted work is a quieter version of the same problem. A finished basement or added suite without a City of Saskatoon building permit can spook a lender or a cautious buyer's lawyer late in the process, after both sides thought the deal was done.
Most of what slows a sale down is fixable before it goes on the market, not after an offer falls through. Get your hand-reviewed valuation from Joel Dyck.