Registered Landscape Architect – WA, CA, OR
Certified Arborist
LEED Accredited Professional


Education and Professional Affiliations
University of Oregon, Bachelor of Landscape Architecture
Member, International Society of Arboriculture (ISA)
Member, American Society of Consulting Arborist (ASCA)
Member, AIA Design for Aging Committee
Member, Council of Landscape Architecture Boards (CLARB)
Member, Pacific Northwest Horticultural Therapy Association


Professional Experience
Margarett Harrison is principal and owner of Harrison Design Landscape Architecture. She has over 27 years of experience as a licensed landscape architect and certified arborist. Margarett’s design leadership merges a guiding, experiential vision with innovative and precise detailing. She focuses her efforts on resolving the complex relationships between people and environments at any scale, from very small to very large. She bring this experience and inventive creativity to all her project