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With Questions About Your HVAC Project

Contact Haddon

Do you have questions about upgrading the existing heating and cooling system in your home, installing heating and air conditioning for your new construction project, or repairing your current HVAC system?

Our knowledgeable office staff is available weekdays from 8:00am – 5:00pm to answer your questions over the phone. After hours we can be reached via email at

You can also check out our list of Frequently Asked Questions.

Our Service Area

Our main head quarters is located in Concord, Ca, however we service most of the greater Bay Area in Northern California.

We Service All of The Following Counties

  • Alameda County
  • Contra Costa County
  • Solano County
  • Lake County
  • Napa County
  • Marin County
  • Mendocino County
  • Sonoma County

Click to see full list of cities we service

Schedule an appointment


135 Mason Circle, Suite L
Concord, CA 94520
Phone: (925) 521-1380
Fax: (925) 521-1381

8 Digital Dr, Suite 100
Novato, CA 94949
Phone: (707) 578-5150

Hours: Mon-Fri, 8am-5pm

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Here For You
For more than 30 years, Haddon Heating and Cooling has been installing and servicing energy efficient heating and air conditioning systems in the greater Bay Area. We use only the highest-rated systems, backed by a minimum 10 year warranty
Giving Back
East Bay
135 Mason Circle, Suite L
Concord, CA 94520
Phone: (925) 521-1380
Fax: (925) 521-1381
Email Us
Licensed & Bonded
•(Lic. #855456)
• Major Credit Cards Accepted
• Financing available to qualified home owners.
• Proudly Serving Alameda, Contra Costa, Lake, Marin, Mendocino, Napa, Solano & Sonoma Counties