ISA-Certified Tree Health Inspections — Documented and Written
Written arborist reports covering condition, risk, and care recommendations — provided to you after every inspection.
What an ISA Arborist Inspection Covers
Structural Integrity Assessment
Evaluation of trunk, scaffold branches, and root flare for cracks, included bark, co-dominant stems, and decay indicators.
Disease & Pest Identification
Visual and diagnostic assessment for fungal disease, cankers, wood-boring insect activity, and crown dieback patterns.
Root System Evaluation
Assessment of visible root flare, girdling roots, soil compaction, and signs of root decay or soil subsidence.
Risk Rating & Classification
ISA-standard likelihood-of-failure and consequence-of-failure ratings for documentation and risk management.
Written Arborist Report
Documented findings in a written report provided to you after every inspection — thorough, clear, and in writing.
Preservation Recommendations
Specific, actionable recommendations for treatment, pruning, cabling, or removal when warranted.
Who Requests Arborist Inspections
Property Managers
Written documentation of tree conditions and care recommendations across single or multi-property portfolios.
HOA Boards
Tree condition reports and ongoing program oversight — clear, written, and easy to share.
Real Estate Transactions
Pre-purchase due diligence assessments that document tree conditions before closing.
Municipal Compliance
Permit support, heritage tree documentation, and code compliance reports for development projects.
Want to see what an ISA arborist report looks like?
Download a sample written arborist report — the same format we provide to property managers and commercial clients across the Pacific Northwest.
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Schedule an ISA Arborist Inspection
Christina N.
Portland Metro · Cabling, Bracing and Pruning · July 2026
Absolutely the best my tree has ever looked! I've had my tree trimmed 4 times over the years and this was the best company I've worked with. They were reasonably priced and clean. They took my concerns seriously and understood that my main priority was my tree's health. I have an 80 foot oak tree and really want it to be storm proof, I'm very happy to say I think it is.
Lisa H.
Portland Metro · Emerald Ash Borer Treatment · October 2025
Peak Tree Specialists were great. They are certified to inject Emerald Ash Bore treatment into Ash trees. They treated some of our trees and were professional.