Our Service Area
At ONESTOP, we believe quality service shouldn’t stop at the city limits. Based in Mountlake Terrace, we provide trusted HVAC and electrical services throughout the greater Puget Sound region—covering King and Snohomish counties and a wide range of residential and commercial neighborhoods. Whether you're in the heart of Bellevue or tucked into a quiet pocket of Arlington, our team is ready to bring reliable, licensed service straight to your door.
We’re proud to work in the communities we call home, and we’ve built our reputation on showing up, doing the job right, and treating every space with care. From full system installations to urgent repairs, we provide honest, straightforward help when and where you need it.
Call (206) 456-7300 or complete our online form to request service in your area.
Built on Trust. Powered by Expertise.
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Fast, Reliable Service 24/7From emergencies to routine calls, our team is always ready, day or night, to restore your comfort quickly.
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Financing & Membership PlansWe offer flexible financing and value-packed memberships to keep your home running smoothly all year.
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Licensed, Bonded & InsuredYour home is in safe hands with fully certified technicians and reliable, code-compliant service.
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Locally Owned & OperatedServing Snohomish and King County with trusted, community-focused HVAC and electrical expertise.
Areas We Serve
Our service area includes a wide range of cities and towns throughout King County and Snohomish County:
- Arlington
- Bellevue
- Bothell
- Cottage Lake
- Edmonds
- Everett
- Issaquah
- Kenmore
- King County
- Kirkland
- Lake Stevens
- Lynnwood
- Marysville
- Mercer Island
- Mill Creek
- Monroe
- Mountlake Terrace
- Mukilteo
- North Lynnwood
- Redmond
- Renton
- Sammamish
- Shoreline
- Silver Firs
- Snohomish County
- Union Hill-Novelty Hill
Not sure if we serve your specific location? Just give us a call—if you’re nearby, we’ll do our best to get to you.
Hear From Our Happy Customers
At ONESTOP, your satisfaction is our priority! See for yourself what our customers have to say about working with us.
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"Very professional and very knowledgeable!"I have to say thank you to Adam for coming out and getting us all fixed up and running again. He is very professional and very knowledgeable, and got the job done quickly. I will definitely be using him from here on out. Great guy for sure!!- Tony N.
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"Wonderful service from Onestop!"They serviced my furnace and AC, and they were on time and super friendly. I would highly recommend Onestop all my family and friends.- Joshua F.
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"Completely satisfied with his knowledge and customer service!"He pointed out some conditions that function best with regular inspection and recommended their maintenance program.- Missy A.
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"They were on time, nice, kind, honest, did their job efficiently and well."Adam and his installers arrived the next morning, on time! The crew did a great job and were done sooner than I'd expected. They not only installed my new Trane furnace, but they also made the whole area look better and cleaner.- Carrie S.
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"10 out of 10!"This company fixed a refrigerant leak that was left by a larger company in the area. They did it at a reasonable rate, they were friendly, knowledgeable, and perform the work in a timely manner. 10 out of 10 recommend.- Michael B.
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"Excellent service from ONESTOP!"They serviced my AC and furnace and were professional, friendly, and clearly knew what they were doing. No pressure, just honest and reliable service. I’m really happy with how everything turned out and will definitely be using them in the future.- Matt H.
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"They have earned my trust and loyalty!"I was impressed by their professionalism, politeness, and knowledge to my inquiries, with efficiency they evaluated any issues in detail and problem-solved with skill, which assures me the job would be done right the first time.- Barbara L.
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"They went the extra mile - no customer could ask for more!"
My new HVAC system works perfectly, and their teamwork was a pleasure to behold, even in hot July weather. The best communication and customer service anyone could hope for. They all really are five stars!
- Joy A.
A Team You Can Trust
Hiring the right company for your HVAC or electrical work isn’t just about availability—it’s about trust, consistency, and knowing the job will be done right. At ONESTOP, we bring years of hands-on experience and a commitment to great service that you can see in every project. We don’t cut corners. We don’t leave you in the dark. And we don’t walk away until you’re comfortable with the results.
Here’s what makes our team a reliable choice across the region:
- Locally owned and community-based – We’re not a franchise or out-of-town outfit. We live and work right here in the Puget Sound region.
- Licensed, insured, and experienced – Our technicians are fully certified to perform residential and commercial work, and we stay current on local codes and standards.
- Upfront pricing and free estimates – You’ll know the cost before we start—no surprise fees or vague quotes.
- Same-day service when scheduling allows – We move fast when needed, especially for urgent repairs or unsafe situations.
- Flexible weekend availability – We understand your time is limited, so we make ourselves available outside of the 9-to-5 whenever we can.
- Long-lasting results backed by strong warranties – Our membership plans offer extended protection on the systems we install, including 10-year parts warranties.
We’ve earned the trust of homeowners and businesses across the region by staying consistent, honest, and approachable—no matter the size of the job.
Complete our online form to schedule service in your city or speak with a member of our team today.
