Expert Witness Services &
Tree Appraisal

Tree laws in Washington State are complex. Having a credible expert witness on your side is invaluable in cases of timber trespass, tree appraisal or view rights.

We offer tree related expert witness consulting and tree appraisals for tree and vegetation related disputes throughout Washington State.

As Consulting Arborists, we evaluate and develop an impartial and independent expert opinion through rigorous evaluation and analysis. This methodology and further conclusions are presented orally in cases of litigation and testimony, or through the process of comprehensive report writing. We assist our clients through all phases of a dispute, from before legal filings through discovery and trial.

Peninsula Environmental’s founder is a Board Certified Master Arborist and Registered Consulting Arborist often tasked to provide expert witness testimony and tree appraisals for attorneys, homeowners and associations in relation to timber trespass, tree risk and tree failure.

We prepare for the unique demands of litigation by developing comprehensive analysis while addressing key issues with clear and concise testimony in deposition and trial.

In addition to common tree appraisals, we provide court appointment expert consulting, lawyer attained expert witness services, and other matters of tree forensics and tree law. We can offer you the following in terms of expert witness services:

Tree Forensics

Trees are living organisms; they germinate, grow, mature, decline and eventually die. With forensic examination we can reverse engineer decay and wood stresses to assess and understand patterns prior to tree failure. With a Board Certified Master Arborist and Registered Consulting Arborist with 15 years experience in arboricutlure and distinct training & experience in tree appraisal and tree law, you and your clients can be sure you’re receiving objective evidence-based information.

Objective Reporting

Our Registered Consulting Arborist has extensive training in objective, legally defensible report writing. He has attended the American Society of Consulting Arborists Consulting Academy and the Community Tree Institute hosted by University of Washington and Oregon State University, both specifically training on objective evidence-based reporting and working with tree and vegetation laws.

Expert Witness

Expert testimony is required when specific or technical information and expertise is necessary in legal decision making. We provide such expert testimony and expert consulting in decisions regarding tree biology, tree safety and tree appraisals. Board Certified Master Arborist, John Bornsworth, has sat as an expert witness on numerous cases, both pre-trail and in trial. We provide Expert Witness & Technical Consultant services to plaintiffs or defendants in cases involving tree failure and negligence, personal or property injury, tree theft, construction defect, timber trespass, other tree loss and tree nuisance cases.

Successful Outcome

To date, all of our tree appraisal values, and expert witness cases have resulted in successful outcomes for our clients. Our experience working with lawyers and homeowners across Washington gives us additional perspective in pre-trail cases. These include cases of timber trespass, tree negligence, view rights and tree appraisals.

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