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Proudly Serving Customers in Seattle, WA Areas We Serve

Brennan Heating, Air Conditioning, Plumbing, and Electrical is proud to serve Seattle, Washington and other surrounding areas.

Trusted Home Services Across Western Washington

From Seattle to the Surrounding Puget Sound Communities, 

Brennan proudly brings comfort, safety, and reliability to homes throughout the region.

For over 30 years, Brennan Heating, Cooling & Electric has proudly served homeowners across Western Washington with expert solutions in HVAC and electrical services. Based in Seattle, our reach extends throughout the Puget Sound region—including King County, Pierce County, Snohomish County, Kitsap County, and beyond. Whether you’re in a major metro area or a nearby suburb, our team is just a call away—ready to deliver honest service, fast response times, and industry-leading care.

We believe every homeowner deserves to feel confident in their comfort systems, and that’s why we invest in the best local technicians and customer support staff. Wherever we go, we bring the same dedication to quality, safety, and transparency that’s made Brennan a trusted name in thousands of Western Washington households. Our reputation has been built on showing up when it matters most and treating every home like it’s our own.

If you’re unsure whether we service your specific city or neighborhood, just reach out! Our friendly team is happy to confirm service availability and help you schedule an appointment that works for you. Brennan is here to keep your home running smoothly—wherever you are in Western Washington.

Hear From Our Happy Customers

At Brennan Heating, Air Conditioning, Plumbing, and Electrical, your satisfaction is our priority! See for yourself what our customers have to say about working with us.

    Brennan Means Quality
    “Detail-oriented and their technicians spend time teaching you the system. I also can’t believe they also came back the next day to caulk a tiny hole they made. You get quality with Brennan.”
    - Marcin N.
    5 Stars
    “The install team was great. They were all experienced and really enjoyed their jobs, and it showed. I love our new Carrier 38MURA hvac system already, and it's not even hot out yet.”
    - Melissa R.
    Two thumbs up!
    “Bryan & Michael arrived early as I requested and worked hard to clean the furnace vents, returns, and ductwork, including the dryer vent. Our daughter had recently used Brennan & recommended the company. I am delighted with the results.”
    - Janie H.
    Outstanding!
    “The service was extremely professional, courteous, respectful, and knowledgeable. We loved Dakota & Brian!”
    - Lloyd N.
    My New Go-To Company
    “Excellent and efficient service. Brayan Rodriguez and Giovanni did a great job. Brennan will be my go to for services needed”
    - Diane V.
    Great Customer Service
    “The services provided by the Brennan staff were outstanding. Sergio & James were on time, completely explained the 5 W's before starting, they were efficient, cleaned up as they worked, explained how each part of the system functioned.”
    - Steve S.
    Highly recommend Brennan!
    “I had Brennan come today to clean my air ducts. Since this was the first time having it done, it was reassuring to know it’s a pretty simple & fast process, and totally affordable. You're always in good hands with them.”
    - Sandy M.
    No One Better
    “Our experience from estimate to installation was outstanding! Their price and quality of installation were a great deal. I highly recommend them for any Water Heater, AC, or Heating needs!”
    - Douglas D.