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.

  •  12,009,981 sq. ft.

    Lifetime Completed

  •  81,188 sq. ft.

    Completed Year-to-Date

  •  436,402 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 Set To Make Change Happen with Sound Mental Health HQ project in Tukwila

Apr. 3, 2017

Unimark Construction Group is excited to once again be working with Sound Mental Health to renovate their headquarters located in Tukwila. This project will include the demolition of all finishes throughout the existing space including existing walls, doors, ceiling, flooring and casework. The build back will consist of a completely new layout, with all new […]

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