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.
-
Fast, Reliable Service 24/7From emergencies to routine calls, our team is always ready, day or night, to restore your comfort quickly.
-
Financing & Membership PlansWe offer flexible financing and value-packed memberships to keep your home running smoothly all year.
-
Licensed, Bonded & InsuredYour home is in safe hands with fully certified technicians and reliable, code-compliant service.
-
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.
-
"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.
-
"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.
-
"Everything worked out really well!"I used them for maintenance on my furnace and AC. They explained things well, were polite & professional. It was scheduled quickly and the price was good.- Jon E.
-
"12/10 recommend them for all of your HVAC needs!"They went above and beyond our expectations, and I not only look forward to working with them in the future, but I feel confident and safe knowing they genuinely have our best interests in mind when doing their job. You can tell they strive for excellence- Craig M.
-
"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.
-
"If you want great customer service and great quality work give them a call!"I have to say, Onestop is top-notch, and Adam was great to work with, did not give us the run-around of what we didn’t need, as most companies seem to do. Adam was upfront and honest. Fantastic prices, exceptional customer service!- Sarah H.
-
"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.
-
"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.
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.
