MSARCH
brown and white concrete house under blue sky during daytime — contractors in London, Ontario

Best contractors in London, Ontario

There are 97 home-service contractors in London, Ontario in the MSARCH directory, with an average Google rating of 4.7★. That includes 48 HVAC contractors, 25 electricians and 24 plumbers.

The most-reviewed is Reliance London Heating, Air Conditioning & Plumbing with 13,157 Google reviews, while Maxcare Heating And Cooling holds one of the top ratings at 5.0★. Every listing below is ranked by Google rating weighted for review volume.

  • 97Contractors
  • 4.7★Avg rating
  • 33,059Reviews

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

Photo by Dillon Kydd on Unsplash

HVAC & Heating (48)Electricians (25)Plumbers (24)

Nearby cities

St Thomas 53Ingersoll 24Strathroy 24Aylmer 11Tillsonburg 28Woodstock 43

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How many contractors are in London?

MSARCH lists 97 HVAC, electrical and plumbing contractors in London, Ontario, with an average Google rating of 4.7 out of 5.

What is the highest-rated contractor in London?

Maxcare Heating And Cooling is among the highest rated in London, with 5.0★ from 268 Google reviews.

How are these contractors ranked?

MSARCH ranks London 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.