Closing is the highest-consequence hour of the pool year. A pool that is opened badly costs a few hundred dollars in chemicals. A pool that is closed badly costs a return line under the deck, a split skimmer or a heater full of ice — usually discovered in May, when every crew is already booked.
Work top to bottom. The order is deliberate: you cannot blow a line that still has water above the skimmer, and you should not fit a cover before the chemistry is set.
0 of 18 complete
0%
Before the crew arrives
Water and chemistry
Lines and equipment
Cover and winter
If you are hiring a crew
Ask one question before price: “Do you blow every line, including the main drain?” A closing that skips the main drain or plugs the returns before the air clears is not a closing. The price difference between a $350 and a $550 closing is usually whether antifreeze, a pressure test and a photo report are included.
Book by the last week of September in Halton and York, and by the first week of October in Toronto and Durham. Crews stop taking new closings before the first hard freeze, and late-season visits carry a premium.
What a failed closing costs
- Split return line: $1,200–$2,500, including deck cutting and patching.
- Cracked skimmer: $400–$900, more if the deck has to come up.
- Heater damaged by ice: $1,500–$3,000 to replace the manifold or unit.
- Torn or stretched cover: $1,800–$4,500 for a replacement safety cover.
- Liner wrinkled from a drained pool: $4,500+ for a new liner.
Against those numbers, a professional closing is cheap insurance. Compare local Toronto and Oakville closing prices, or read the full winterizing guide.