Arborist Reports & Tree Risk Assessments

Tree risk assessments evaluate the likelihood of failure and the potential consequences, using industry standard methodology published by the International Society of Arboriculture to produce findings that are systematic, defensible, and consistent. We provide a written report documenting our findings, risk ratings, and recommendations for risk mitigation as appropriate. Common reasons clients request an assessment include storm damage, pre-purchase due diligence, declining tree health, neighbor disputes, and insurance or legal documentation.

Arborist reports provide written documentation of tree condition, health, and value for permit applications, development projects, real estate pre-purchase inspections, and insurance purposes. We prepare reports in accordance with ISA standards and tailor the scope and format to what the situation actually requires — whether that's a single tree removal permit or a comprehensive tree inventory for a large development site.

Tree preservation plans identify trees to be retained during construction or development and establish the protection measures required to keep them viable through the project. We assess each tree's condition and structural suitability for retention, define protection zones, and provide specifications that can be incorporated directly into construction documents. Our reports meet the documentation requirements of Portland and the municipalities we serve throughout the Portland metro area.

Measures internal decay and wood density by recording the resistance encountered as a fine drill bit passes through the trunk or branch. Produces a printout that documents findings and supports risk assessment conclusions.

Uses sound wave technology to map internal wood density and detect decay, cavities, and structural anomalies without invasive cutting. Provides a cross-sectional image of the trunk at the point of assessment.

Monitors subtle changes in a tree's lean over time, providing quantitative data on root plate movement and structural stability. Particularly useful for ongoing monitoring of high-value or high-risk trees.