We offer expertise in design-build, design assist and plan/specification services for a variety of projects, in both new construction and tenant improvement projects.

From conceptual design to facilitating and/or implementing the fabrication, construction planning, and installation of mechanical systems that will provide a continued reduction of operational costs and energy consumption.


Our unique set of qualifications enable the effective planning and flexibility necessary for construction of Mechanical Systems. 

JMI's proven Revit MEP methodologies include: robust communications (what, when, where, and why), qualified personnel, and responsive approach to unforeseen issues that may occur during all stages of construction.  Which saves both time and money in the present as well as the future.

Project Management

JMI's approach to projects involves the overlapping capabilities within our team throughout all stages of construction, coordinating trades, manufactured equipment, and materials & components that make up infrastructure. 

This requires being up-to-date on regulatory requirements, innovative software & equipment, and maintaining a high-level of craftsmanship in order to maintain our reputation of quality service.

Contact JMI

Johansen Mechanical, Inc.
20109 144th Ave NE
Woodinville, WA 98072

24-Hour Service

JMI is available 24-hours-a-day, 7-days-a-week, 365-days-a-year with access to, and response from, the service team

Green Building

We offer our Clients an Operations Overview, Energy Audits, and Asset Management services to ensure continued reduction of operational costs and energy consumption.


From the conceptual design to facilitating the preparation, direction and coordination of project plans that incorporate the wide variety of physical components we offer.


JMI’s 16,000 sq. ft. fully equipped for Cutting, Machining, Polishing, Forming, and Welding.


Since our establishment in 1983, Johansen Mechanical has utilized proven CPM implementation methods to manage and construct Mechanical Systems for Commercial, Institutional and Environmental Infrastructure.