K. D.
6/29/2025
I had a shower and bathtub with frozen pipes. In addition I needed a sprinkler system anti siphon valve replaced. Making an appointment was very easy and Mary was very pleasant. Jason arrived...
O.C. McDonald
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(44)
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1150 W San Carlos St
San Jose, CA 95126
O.C. McDonald is a seasoned mechanical contractor based in San Jose, CA. Specializing in heating, air conditioning, and plumbing services, they cater to both commercial and residential clients. With a rich history dating back to 1906, O.C. McDonald is renowned for its innovative technology solutions paired with traditional values.
For commercial properties, O.C. McDonald offers comprehensive design, installation, and maintenance services, whether for new constructions or retrofit projects. Their holistic approach ensures seamless project management, ultimately minimizing costs and complexities for their clientele. From HVAC to building automation systems, they are equipped to handle a wide range of mechanical needs.
On the residential front, O.C. McDonald leverages over a century of experience to provide top-notch heating and cooling solutions. Their team of skilled technicians collaborates with homeowners to deliver tailored installations, ensuring optimal comfort and efficiency. Additionally, with a 24-hour emergency service, clients can rely on O.C. McDonald to address urgent issues promptly and effectively.
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Reviews
4.044 reviewsSara N.
9/11/2025
Severely downgrading my rating following my third and most recent experience with OC McDonald. I do not want to recommend their services due to some extremely questionable billing policies. We had...
Peter Y.
8/26/2024
Had a leak with a valve and a backed up line as well as a faucet replacement. OC took the call at 7am and 815am Jason was at the door. Spent a few hours on site and fixed everything...
Kate S.
2/6/2024
Alright. So if you need a residential plumber, please look no further. I spent 20 years and have gone through the wringer! He's so good I almost want to keep it a secret, but I also know that...
Martin B.
8/10/2022
Scheduled an appointment today for an O.C. McDonald representative ("James") to come to our home to discuss adding a new heating and AC system. We have an older home, and this likely would entail...
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