Best Pool Cleaning & Maintenance Services in Markham (2026)

50% of the rated companies here hold 4.8★ or better, and 2 of the 5 carry fewer than ten reviews, so the shortlist is shorter than the count suggests. The longest record on this page runs to 349 reviews.

1. 

   1Action Home Services

   4.8★ rating · 349 Google reviews

   84/100 score

   Markham · Pool Maintenance

   Monday: Open 24 hours

   • Says it is insured
   • Says it carries WSIB coverage

   4.8★ rating349 Google reviews

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2. 

   2Pioneer Family Pools

   4.3★ rating · 211 Google reviews

   54/100 score

   Markham · Pool Maintenance

   Monday: Closed

   4.3★ rating211 Google reviews

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3. 

   3Gta pool pros

   5.0★ rating · 5 Google reviews

   53/100 score

   Markham · Pool Maintenance

   Monday: 7 a.m.–7 p.m.

   5.0★ rating5 Google reviews

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4. 

   4BonaVista Pools Limited

   4.3★ rating · 59 Google reviews

   51/100 score

   Markham · Pool Maintenance

   Monday: 8:30 a.m.–4:30 p.m.

   4.3★ rating59 Google reviews

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5. 

   5CRYSTAL POOL INC

   No rating on file

   22/100 score

   Markham · Pool Maintenance

   Monday: 8 a.m.–8 p.m.

   No rating on file

   Request a quote

Verbatim from each company's public Google reviews, as they stood in the August 2026 dataset. PoolBuilderIndex did not write, edit or choose these for sentiment.

• “We recently hired Action Home Services to completely transform our backyard - including a new deck, landscaping, and a retaining wall - and we couldn’t be happier with the results! From the very first…”

  Action Home Services · 5★ review · left a year ago

• “We have been loyal customers of Pioneer Family Pools for years, trusting them with our openings, closings, and major purchases like a new liner, heater, filter, and safety cover the last few years. I'm…”

  Pioneer Family Pools · 2★ review · left a month ago

• “Good service and great snow removal . Thank you”

  Gta pool pros · 5★ review · left 2 years ago

• “BonaVista Pools made our backyard dreams into reality! From ideation and design of the custom pool with integrated hot tub, to build, to continued maintenance and care, Peter and team provided exceptional service from…”

  BonaVista Pools Limited · 5★ review · left 2 months ago

The median company on this page carries 211 Google reviews and 4 of the 5 have enough reviews to rate. Read our full methodology, including why a company from the next town over appears here.