AHBL Inc. | 4,602 followers on LinkedIn. Providing innovative planning, design, and engineering services. Offices in Seattle, Tacoma, Spokane & the Tri-Cities. | AHBL was founded in 1969 to bring a collaborative approach to the development of built environments. AHBL offers services in civil engineering, structural engineering, landscape architecture, community planning and land surveying. The firm is headquartered in Tacoma and has offices in Seattle, Spokane and Tri-Cities.