Where teamwork and quality meet.

Unimark is the premier construction firm dedicated exclusively to commercial build-out and tenant improvement projects in Seattle’s central business district and around Puget Sound.

Interior appreciation.

Zillow Headquarters

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Taking the ground floor
to new heights.

Westlake Tower

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Tune in. Turn on. Build out.

Rhapsody Headquarters

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Integrated approach. Elevated results.

We work as a highly collaborative partner and resource to architects, brokers, owners and tenants, from design through occupancy and beyond. Since 1953, our focused experience, agile teamwork and financial fortitude have allowed us to build exceptional spaces and valued relationships. Our firm has grown up with this great city, which gives us an invaluable inside perspective on its buildings and communities as they have grown and changed over the decades.

  •  12,740,359 sq. ft.

    Lifetime Completed

  •  840,026 sq. ft.

    Completed Year-to-Date

  •  806,019 sq. ft.

    In Progress

View our case studies for information on each project.

About our companyMeet Our Team

Adding value from start to finish.

From initial project planning, estimating and permitting to construction management and quality control, Unimark is focused, accessible and fully engaged. Our diligence and follow-through have helped us establish many excellent client and partner relationships over our more than 60 years in the construction business.

  • Pre-Construction

    • Feasibility studies
    • Preliminary cost estimates & schedules
    • Design management, value engineering & review
    • Permit & entitlement management
  • Construction

    • Project coordination & site supervision
    • Scheduling, accounting & cost control
    • Quality control
    • Punchlist & closeout
  • Post-Construction

Explore our capabilities

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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