The economics work against it in a way they do not in a warm climate market. A liner, pump, heater and safety fencing all carry maintenance and winterization costs that run whether or not the pool gets used, and a buyer who does not want that upkeep will simply discount the asking price rather than pay for the feature.
Condition and permitting decide whether the discount is small or severe. A pool built to code with a permitted fence and a documented safety cover reads very differently to a buyer than an older shell with no record on file, since an unpermitted structure raises a flag during a $400 to $600 home inspection.
Families with young children and buyers relocating from a warmer market are the exceptions who will pay something for it, so the right number depends on who is likely to buy your specific house. Get your hand-reviewed valuation from Joel Dyck.