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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"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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"The job was extremely well done!"Adam and Gram came in today to install a new furnace. The job was extremely well done and completed in half a day. I couldn't be happier with their service and the quality of materials they used.- Chris M.
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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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"I will definitely be using their services again in the future."I recently hired Onestop to install a new AC unit in my rental property in Mountlake Terrace, and I couldn't be more pleased with the service I received. From start to finish, the team impressed me with their professionalism, expertise, and attention to de- Danielle B.
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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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"I can't say enough good things about the technician that came and performed the work!"OneStop is a top-notch company! They installed our new heat pump in no time, and we couldn't have been more pleased with the quality and professionalism. Very polite, professional, and proficient!- Amanda O.
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"They're my top choice for any heating and cooling needs!"I recently hired Onestop for a furnace repair, and I couldn't be happier with the service they provided. From the moment I contacted them to the completion of the repair, Onestop demonstrated professionalism and expertise that exceeded my expectations.- Ashley N.
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"Fantastic services!"Absolutely amazing service from OneStop! They quickly diagnosed and fixed my heating issue, restoring the heat to my home in no time. Professional, efficient, and courteous throughout the process. Highly recommend!- Ryan J.
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.
