MSARCH

Best contractors in Waterloo, Ontario

MSARCH tracks 45 vetted contractors in Waterloo, Ontario, averaging 4.7★ on Google. That includes 25 HVAC contractors, 10 electricians and 10 plumbers.

The most-reviewed is Reliance Heating, Air Conditioning & Plumbing with 2,685 Google reviews, while Cross Heating & Air Conditioning Ltd. holds one of the top ratings at 5.0★. Every listing below is ranked by Google rating weighted for review volume.

  • 45Contractors
  • 4.7★Avg rating
  • 7,190Reviews

Updated July 2026 · Ranked by Google rating, review volume and recent-review sentiment

HVAC & Heating (25)Electricians (10)Plumbers (10)

Nearby cities

Kitchener 61Cambridge 103Guelph 57Fergus 10Stratford 48Listowel 13

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How many contractors are in Waterloo?

MSARCH lists 45 HVAC, electrical and plumbing contractors in Waterloo, Ontario, with an average Google rating of 4.7 out of 5.

What is the highest-rated contractor in Waterloo?

Cross Heating & Air Conditioning Ltd. is among the highest rated in Waterloo, with 5.0★ from 275 Google reviews.

How are these contractors ranked?

MSARCH ranks Waterloo contractors by their Google star rating, weighted by review count so a company with hundreds of reviews outranks one with only a few. All data is sourced from Google Maps.