History, culture and values.

The foundation of mutual respect that exists between Unimark management, staff and clients is the driving force behind our evolution over the past 60+ years. Since the early 1950s, we have built and protected a strong reputation as the premier Tenant Improvement construction company, not only in Seattle’s Central Business District, but throughout the Puget Sound region. 

Building quality begins with building quality relationships.

Due to our long-term experience and long-term relationships, we have developed the skill and flexibility to exceed our customers’ expectations time and again, whether serving as general contractor, construction manager or design-builder. Unimark is uniquely equipped to engage in pre-planning, design, construction and interior build-out, creating efficiencies that can only be gained through full lifecycle collaboration with architects, subcontractors and city agencies.

Our close relationship with Servicemark Tenant Services also allows us to provide a seamless transition to a company that will take care of your space long after construction is completed.

Developing new facilities takes more than just the physical construction: understanding client needs, assisting with pre-planning, responding to the unexpected and going the extra mile are the cornerstones of the Unimark philosophy.

Unimark Core Values

Trustworthiness is displayed in everything we do.

We are committed to the goal of seeing every project injury free. We believe this can be achieved through the proper application of safe work practices and employee training.

Employee Respect:
Our people are our greatest resource. We actively promote an environment for growth, ownership and responsibility by providing support, opportunity, guidance and recognition.

Our distinctive craftsmanship and strong team atmosphere reflects our dedication to being the absolute best.

Exceptional Service: 
Clients come first at Unimark and their satisfaction is paramount to our success.

Financial Strength: 
Maintaining financial stability creates growth opportunities and long-term industry confidence.


Unimark is a proud member of these organizations:

bbb-logo naiop-logo usgbc



Unimark Construction employs DIRTT Certified Technicians to help you Build Better

Unimark is dedicated to commercial build-out and tenant improvement. It's what we do.

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Unimark Continues to Do Great Work With Williams Kastner

Unimark continues to do excellent work on the Williams Kastner tenant improvement project. This two floor occupied tenant improvement project includes a stair infill on Floor 40, the complete remodel of the elevator lobbies on both floors,  upgraded high end finishes, carpet, and paint across the space.  Landlord ceiling upgrades which include the repair of […]

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