About Us

Hazelrigs Architecture was formed in 2004 by Colleen Hazelrigs to integrate green building into tenant and landlord design in the Seattle and Bellevue Metropolitan area. We believe that the places and organizations in which we work impact our well-being, and when a company has happy and healthy staff the company prospers.

Our goal is to transform your vision of your space into reality. We listen to your ideas, needs, preferences, wishes, and goals. With these in mind we craft solutions and together fine tune the design to best meet your needs for your new space. We understand that a fast response to a fast-moving environment is essential. Our approach is to work with the real estate broker, landlord, and contractors to encourage a successful project for everyone.

Colleen Hazelrigs, Principal Architect


Colleen has practiced architecture since 1985 in a wide range of project and building types. She specializes in commercial tenant improvement design, and has expertise in BOMA Calculations*, permitting, code research, and facility planning.

Landlords, tenants, and brokers appreciate how she meets the needs of all the parties in the lease team; tenant, landlord, broker, and contractors. She has helped clients navigate competing values between departments. Through her programming and design, her clients have developed a better understanding of their business.

The size of her projects ranges from 1,500 SF to 200,000 SF multi floor and multi building TI projects, cold shell, reconfigurations, and historic building renovations, including tenant and landlord representation. She has worked with corporations, small businesses, landlords, and real estate brokers.

*Building Owner Management Association ANSI Standards leasing measurement calculations