Heating, Plumbing & Air Conditioning in Contra Costa County Since 1974

50 Years in Business

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Plumbing, Heating & Air Conditioning in Contra Costa County, CA

Stewart Heating, Plumbing & Air Conditioning  is your leading local HVAC contractor in Contra Costa County providing homeowners with reliable indoor comfort control since 1974. We are a NATE certified contractor which means you can trust our expertise. Additionally, we believe business is done right by truly serving our customers, and we prove this every day on each customer job. You will be hard pressed to find another company in the area who maintains the high customer satisfaction ratings that we do. You can count on us as your local Contra Costa County HVAC contractor for cutting edge, reliable and highly efficient HVAC solutions ranging from scheduled maintenance to complicated repairs to a turnkey system installation.

Air Conditioning Service in Contra Costa County

A lot goes into proper home air conditioning installations, maintenance & repair. In fact, if not designed and installed correctly, your cooling system could end up costing you quite a bit of extra money in lost efficiency. Stewart’s has the in-depth knowledge and expertise to not only maintain and repair systems, but design and install them to operate at high efficiency levels while giving years of reliable service. We know HVAC inside and out, and our air conditioning services are the finest you will find for Contra Costa County.

Home Energy Audit in Contra Costa County, CA

Our home energy audit combines comprehensive comfort and efficiency analyses. Regardless of appearance, condition or age, every home loses energy. Why not contact us for a home energy audit today. Industry studies show the average American home consumes more than 1 ½ times the amount of energy than is necessary. By implementing energy solutions homeowners can save money and reduce the burden on our environment.

Contra Costa County Heating

Similar to cooling systems, efficient and reliable home heating isn’t just about purchasing a furnace with a high AFUE rating. Obtaining the right furnace, installed the right way will make all the difference. Plus there are many other options for homeowners such as advanced air cleaners that not only clean the air you breath, but keeps your furnace ultra clean by filtering out tiny particles that can accumulate and cause lost efficiency.

Furnace Repair & Maintenance

Similar to vehicle maintenance, maintaining your HVAC system is very important if you want it to run efficiently, and last as long as it was manufactured to last. A neglected heating  system might work for you each season, but it will begin to lose efficiency, and can have premature problems, costing extra money for furnace repair. Stewart’s seasonal maintenance plans are low cost ways to ensure your HVAC system is running at peak performance. We will clean and inspect your equipment for smooth operation.

If your furnace needs repair, our experienced technicians will quickly analyze and diagnose the problem. Our in-depth and extensive experience in the HVAC field means we know how to quickly find the real problem with your system. This saves you the extra time and expense associated with lack of experience and poor troubleshooting. Once the problem is determined, we will give you our recommendations on the best action to take for your specific situation.


Stewart’s offers plumbing repair, installation and service for any problem from a clogged kitchen sink to a complete sewer pipe or whole home pipe replacement.

Indoor Air Quality

You have probably heard the term “Indoor Air Quality” or “IAQ” tossed around when talking about indoor comfort systems. This is because modern buildings and homes are built to be very efficient, but this also traps air inside along with toxins from cleaning supplies, pet dander, smoke, viruses and bacteria.

Stewart’s offers products that can radically change your indoor air. IAQ products such as a ventilator, UV light, air cleaner and whole house humidifier integrate into your HVAC system, and work together to renew and purify your indoor air.

For a Contra Costa HVAC contractor you can trust, simply call us today at (925) 203-9141. We will show you what true customer service is really like.

Residential HVAC in Contra Costa County


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