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

50 Years in Business

We’re here to improve the comfort, safety
and health of your home and family.

Heating, Plumbing & Air Conditioning in the Bay Area

Air Conditioning

Call us when you need affordable & dependable air conditioning service in Contra Costa County, CA


Our heating services include: maintenance, installation & expert furnace repair. We service all brands & models.


Our professional plumbers have years of experience working on home kitchens, bathrooms, pipes and drains.

Home Energy Audit

We are a Home Energy Audit company with a focus on whole home energy efficiency.

Serving Pittsburg & the Contra Costa County with HVAC & Plumbing since 1974!

Need air conditioning installation or repairs in Contra Costa County? Call Stewart Heating, Plumbing & Air Conditioning at (925) 203-9141 and see why your neighbors love us!

Since 1974 Stewart Heating, Plumbing & Air Conditioning has been dedicated to providing the best HVAC solutions for your needs, including commercial, industrial & residential heating and air conditioning in Pittsburg, CA & Contra Costa County. We do our projects right the first time and it shows, as our company is built on referral business. In 2008, approximately 65% of our business was from referrals. This enables us to focus on quality, and installing heating and cooling systems that work the first time, every time while meeting your unique design requirements.

If we don’t provide what you need and want, we’re not doing our job. Our employees are trained to ask questions and find out what your specific desires are, and then to see your job through from start to finish – ensuring your 100% satisfaction. We offer upfront pricing so you know exactly what you’re paying for. We are a green focused company, and provide home energy audits to help our customers move to more efficient homes.

At Stewart Heating, Plumbing & Air Conditioning, we provide a full range of services for heating, heat pump, and air conditioning repair and installation in Pittsburg & all of the Contra Costa County.  Our skilled technicians are dedicated to delivering exceptional quality and customer satisfaction. With our integrity, friendliness, and commitment to excellence, we are the ideal choice for all your HVAC needs in Contra Costa County.

Plumbing & Drain Cleaning

Save $50

$50 Off Any Plumbing or Drain Cleaning Service.

*Not valid with any other offer

Water Heater Services

Save $100

$100 Off Water heater Install or repair.

*Not valid with any other offer

Residential Services

stewarts plumbing van
Save $100

$100 Off Whole House Service & Free Camera.

*Not valid with any other offer


Bryant Factory Authorized Dealer

When choosing a dealer, look for the Bryant Factory Authorized Dealer symbol, which means your dealer has met the highest standards for superior skills, service, and a promise of 100% satisfaction guaranteed.*

It takes reliable service and technical know-how to stand out, and all our dealers do Whatever It Takes® day in and day out.

*100% Satisfaction Guarantee is good for one year after installation date. Due to ongoing supply constraints, Evolution controls may not be available at time of equipment installation, and dealers may install temporary, substitute controls. Consumer non-satisfaction resulting from the temporary controls shall not be subject to the 100% Satisfaction Guarantee. Evolution equipment shall be subject to this Guarantee once the communicating control is installed. See dealer for details.

heat-pump gas-furnace

An Evolution in Comfort Has Arrived

How Your Home or Business Can Benefit From An Energy Audit

Part of our indoor comfort control solutions are home energy audits, for identifying areas where you home can be more efficient. This protects our environment, and protects your wallet!

Benefits of Scheduling an Energy Audit

home energy audit