Stonehedge Tree Experts,


Tree Pruning

Tree Removal  

Ornamental Shrub Pruning

Tree Cable and Support Systems

Tree Risk Assessment    


Stump Grinding

206.937.7428                                                 Certified Arborists

Stonehedge Tree Experts, Inc. is a quality tree care company serving the Seattle and outlying areas.


Stonehedge Tree Experts, Inc. is a quality tree care company serving the Seattle and outlying areas.  We have been in business for 30 years and hire only ISA (International Society of Arboriculture) Certified Arborists or apprentices.  The majority of our clients are repeat customers and referrals because they know that they will receive the highest quality professional tree work.  All work is supervised by  experienced, highly-qualified personnel who regularly attend continuing educational seminars and classes. 

Simply stated, Stonehedge provides the best work in the business.


Mark Harman, owner and operator is an ISA Certified Arborist and Certified Tree Risk Assessor.  Mark started Stonehedge Tree Experts 30 years ago in 1981,  shortly after graduation from Washington State University with a bachelor’s degree in Ornamental Horticulture and Nursery Management.  He is a member if the International Society of Arboriculture and has been an active member of Plant Amnesty from its early beginnings.

In the summer of 2006 he completed the 
PNW-ISA Tree Climbing Championship (TCC) at Marymoor Park in Redmond, Washington. He was the oldest competetor at the event.  He didn’t win any prizes but he completed all events better than many.

In April of 2009 he completed the Tree Risk Assessors course and is now a Certified Tree Risk Assessor.  Mark can help determine the Risk Potential of your trees around your living areas, helping you and your family remain safe living with trees and also help spot potential tree problems before they occur.


Mark Harman and Matt Kuebler both ISA Certified Arborists, shown during the Climbing Competition at Marymoor Park in Redmond. Mark is gearing up for the foot lock event.

Stonehedge Tree Experts is located in West Seattle. Other areas served include:

Seattle, Burien, Normandy Park, Des, Mercer Island, and Bellevue.


Copyright 2011 Stonehedge Tree Experts, Inc.