Local Pros / California / Ontario
General Contractors in Ontario, CA
24 local general contractors serving Ontario and the surrounding area. Ontario is a mid-size city with steady demand for home work. See typical California costs and a free DIY-or-hire breakdown before you reach out. We never sell your info and never take kickbacks.
Population
~171,214
Pros within 35 mi
24
Nearest listed
3 mi
Typical general contracting cost in California: hiring runs $78,000–$216,000, DIY about $59,000–$171,100. Calibrate it to Ontario before you call.
General Contractors near Ontario
All About Acoustics
General Contractor · Anaheim, California · 21 mi
COTO DE CAZA GLASS
General Contractor · Rancho Santa Margarita, California · 29 mi
Thor McAndrew Construction Drywall Specialists
Kitchen Remodel · Ontario, California · 3 mi
Steve's Plumbing Heating & Air Conditioning
Plumber · Upland, California · 4 mi
All American Traditions Foundation Repair
Concrete · Upland, California · 4 mi
MNM Construction
Plumber · Chino, California · 4 mi
Action Electric
Electrician · Chino, California · 4 mi
True Blue Heating & Air Conditioning
HVAC · Rancho Cucamonga, California · 4 mi
American Cool Heat Air - Commercial Refrigeration & Commercial HVAC (Heating
HVAC · Rancho Cucamonga, California · 4 mi
Greg's Custom Woodworks
Bathroom Remodel · Rancho Cucamonga, California · 4 mi
Superior Electrical Mechanical
Plumber · Rancho Cucamonga, California · 4 mi
A and F Ramirez Construction
Roofer · Upland, California · 5 mi
Griffin Garage Door & Gates Repair
Windows & Doors · Upland, California · 5 mi
Permits & rules in California
Permit rules for general contracting vary by city and county in California. Most structural, electrical, plumbing, or mechanical work needs a permit and an inspection. Confirm with your local building department, or see the California guide for specifics. Varies by municipality California general contracting costs are calibrated from the national average using California's regional price parity (1.18) and local labor index (1.22).
See California permit details →General Contractors in Ontario: common questions
How much does it cost to hire a general contractor in Ontario, California?
In California, general contracting typically runs $78,000 to $216,000 when you hire a pro, and about $59,000 to $171,100 if you do it yourself. Ontario prices track the California range, with larger metros toward the high end. Size it to your own home with our free calculator.
Do I need a permit for general contracting in California?
Permit rules for general contracting vary by city and county in California. Most structural, electrical, plumbing, or mechanical work needs a permit and an inspection. Confirm with your local building department, or see the California guide for specifics. Varies by municipality Always confirm with the Ontario or California building department before work begins.
Should I DIY or hire a general contractor in Ontario?
General contracting is rated moderate for a DIYer. Doing it yourself can save the gap between $59,000 to $171,100 and $78,000 to $216,000, but general contractors bring tools, permits, and a warranty. For a large or time-sensitive job, a local pro in Ontario is usually the safer call. Our free DIY-or-hire calculator walks through it.
How many general contractors serve Ontario?
We currently list 24 general contractors within about 35 miles of Ontario, the nearest about 3 miles out. We never sell your information and never take kickbacks.