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  3. Ontario/
  4. Top 10 Rankings
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Top 10 Best General Contractors in Ontario, CA

Ranked by Google ratings, review quality, and response time. Updated April 2026.

Google ratings onlyUpdated hourlyMin 3 reviews required
1
Hostetler Construction Inc.
#1 in Ontario
(909) 938-2348
5
(28 reviews)

338 Bixby Way, Upland, CA 91786, USA, Ontario, CA 91786

Why they ranked: Our top-ranked pick with an exceptional 5-star rating from 28 reviews.

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2
St Paul Contracting
(909) 975-2445
5(14 reviews)

9650 Business Center Dr Building 17, Suite 131, Rancho Cucamonga, CA 91730, USA, Ontario, CA 91730

Why they ranked: A close runner-up with an exceptional 5-star rating from 14 reviews.

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3
HDZ CONSTRUCT & DESIGN INC.
(909) 489-3145
5(11 reviews)

829 S San Antonio Ave, Ontario, CA 91762, USA, Ontario, CA 91762

Why they ranked: Ranked #3 with an exceptional 5-star rating from 11 reviews.

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4
AG Construction, Inc.
(909) 986-7878
5(7 reviews)

807 E State St, Ontario, CA 91761, USA, Ontario, CA 91761

Why they ranked: Ranked #4 with an exceptional 5-star rating.

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5
Rancho Cucamonga General Contractors
(909) 752-0836
5(7 reviews)

10350 Commerce Center Dr ste 500, Rancho Cucamonga, CA 91730, USA, Ontario, CA 10350

Why they ranked: Ranked #5 with an exceptional 5-star rating.

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6
Northstar Construction & Restoration Services
(888) 959-9460
5(6 reviews)

3200 E Guasti Rd #100, Ontario, CA 91761, USA, Ontario, CA 91761

Why they ranked: Ranked #6 with an exceptional 5-star rating.

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7
Elite Construction Ontario
(909) 734-1404
5(5 reviews)

855 Chestnut St, Ontario, CA 91762, USA, Ontario, CA 91762

Why they ranked: Ranked #7 with an exceptional 5-star rating.

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8
Khan Construction Co.
(626) 922-9105
4.9(37 reviews)

5802 Aurora Ave, Jurupa Valley, CA 91752, USA, Ontario, CA 91752

Why they ranked: Ranked #8 with an exceptional 4.9-star rating from 37 reviews.

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9
Fullmer Construction
(909) 947-9467
4.8(18 reviews)

1725 S Grove Ave, Ontario, CA 91761, USA, Ontario, CA 91761

Why they ranked: Ranked #9 with an exceptional 4.8-star rating from 18 reviews.

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10
HDC Construction Inc.
(909) 626-0214
4.8(12 reviews)

5642 W Mission Blvd, Ontario, CA 91762, USA, Ontario, CA 91762

Why they ranked: Ranked #10 with an exceptional 4.8-star rating from 12 reviews.

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View Full Directory — All General Contractors in Ontario

Our Methodology

1

Rating Score (50%) — Average star rating from Google customer reviews.

2

Review Volume (30%) — Number of Google reviews. More reviews = greater confidence.

3

Response Time (20%) — Faster response times earn higher rankings.

Only businesses with 3+ reviews are eligible. Rankings refresh every hour. Paid listings do not influence ranking order.

Frequently Asked Questions

Who is #1 for general contractors in Ontario?

Hostetler Construction Inc. currently holds the top spot with a 5-star rating across 28 reviews.

Are sponsored listings ranked higher?

No. Paid tiers get additional profile features, but ranking order is determined solely by ratings, reviews, and response time.

How do I get my business ranked?

List your business and accumulate at least 3 Google reviews. Rankings are automatic and updated hourly.

Looking for a specific area?

Browse general contractors by zip code or neighborhood in Ontario.

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