What Is an Arborist Report?
An arborist report is a professional written assessment documenting a tree's condition, structural characteristics, relevant site conditions, and recommended management actions. Prepared by a qualified arborist, these reports provide supporting evidence for tree removal permits, property concerns, insurance documentation, and municipal review.
A
certified arborist report typically includes species identification, trunk measurements, condition observations, photographs, and professional findings. Depending on the purpose, it may also address structural defects, tree risk, root impacts, construction conflicts, or preservation recommendations.
Common uses for arborist reports include:
• Tree removal permit applications
• Development and construction planning
• Protected tree evaluations
• Tree preservation planning
• Insurance documentation and storm damage claims
• Neighbor tree disputes and property conflicts
• Root impact and excavation assessments
• Hazard tree documentation and condition assessments
• Municipal code compliance and permitting support
Sound Tree Care's ISA Certified Arborists prepare professional reports supported by field observations, photographic documentation, and practical recommendations for property owners throughout the Puget Sound region.
When Are Arborist Reports Required?
Arborist reports are commonly required when trees may be affected by development, construction, grading, excavation, or proposed removal activities. Municipalities, contractors, insurance companies, and property owners often request professional arborist documentation before projects move forward.
An
arborist report for tree removal may be required when a protected or regulated tree is proposed for removal. The report documents the tree's condition and provides findings relevant to the applicable municipal requirements.
Development Applications
An arborist report for development applications may include tree inventories, construction impact assessments, retention recommendations, and tree protection measures. Our dedicated
Construction & Development Arborist Services page explains these services in greater detail.
Construction Near Trees
Projects involving excavation, grading, foundations, or utility installation near retained trees may require arborist documentation and
tree protection recommendations.
Environmentally Critical Areas
Properties within steep slopes, shorelines, wetlands, or
Environmentally Critical Areas frequently require detailed documentation and
arboricultural consulting.
Insurance and Storm Damage
Arborist reports help document tree failures, storm impacts, structural damage, and liability-related concerns. A
tree risk assessment may also be recommended when hazardous conditions are present.
Professional tree documentation may be used to evaluate disputed tree conditions, property impacts,
boundary concerns, or management recommendations.
What Is Included in an Arborist Report?
A professional arborist report documents tree conditions, field observations, and recommendations relevant to the purpose of the assessment. Depending on the project, a certified arborist report may include tree measurements, structural evaluations, photographic documentation, municipal code references, and management recommendations.
The information included is tailored to the property's conditions, applicable regulations, and the agreed scope of work.
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Tree species identification
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Diameter measurements (DSH/DBH)
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Tree condition and vigor observations
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Structural defect documentation
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Pest, disease, and decay observations
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Site conditions and soil factors
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Construction and excavation impacts
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Root disturbance evaluations
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Tree inventory tables and measurements
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Municipal code and permit references
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Photo documentation and site imagery
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Preservation, mitigation, or removal recommendations
Types of Arborist Reports
Sound Tree Care prepares several types of professional arborist reports, each tailored to a specific assessment purpose. From tree removal permit documentation and tree condition evaluations to insurance claims and development projects, our ISA Certified Arborists provide written findings appropriate to the client's needs and applicable requirements.
Tree Removal & Condition Assessment Reports
Professional tree assessment reports documenting tree health, structural condition, and relevant defects to support management decisions and tree removal permit applications.
Construction Impact Reports
Used to evaluate how grading, excavation, trenching, and development activities may affect nearby trees, root systems, and preservation areas.
Tree Preservation Reports
Prepared to identify trees that should be retained and protected during development, site work, or major landscape changes.
Tree Inventory Reports
Used to document tree species, size, condition, and locations across residential, commercial, or development properties.
Insurance & Damage Reports
Prepared to document storm damage, fallen trees, structural impacts, or tree-related property concerns for insurance purposes.
Municipal Compliance Reports
Created to support permitting requirements involving protected trees, environmentally critical areas (ECAs), and local tree code compliance.
Arborist Reports for Tree Removal Permits
An arborist report for tree removal documents tree condition, structural defects, and relevant site factors to support municipal permit applications. These reports help reviewing agencies evaluate proposed removals involving protected trees, hazardous conditions, or regulated properties.
Tree removal arborist reports may include:
- Tree Identification: Species, trunk diameter, location, and applicable classifications.
- Tree Condition: Health, vigor, decay, structural defects, and root conditions.
- Risk Considerations: Potential failure conditions and nearby targets, when relevant.
- Photographic Evidence: Images documenting tree conditions and observed defects.
- Preservation Alternatives: Pruning, mitigation, or retention options when appropriate.
- Permit Documentation: Written findings and references to applicable municipal requirements.
Sound Tree Care prepares professional tree removal reports for residential, commercial, and regulated properties throughout the greater Puget Sound region.
What You Receive in a Professional Arborist Report
Sound Tree Care delivers organized, evidence-based arborist reports tailored to the intended purpose, whether for municipal permitting, tree condition evaluations, insurance documentation, or property management decisions.
Our reports connect field observations with professional findings and practical recommendations, helping clients and reviewing agencies understand the conditions evaluated and the reasoning behind our conclusions.
Our reporting approach emphasizes:
- Documented Evidence: Site photographs, measurements, and relevant tree observations.
- Clear Professional Findings: Explanations of tree condition, structural concerns, and applicable site factors.
- Practical Recommendations: Preservation, mitigation, monitoring, or removal recommendations appropriate to the assessment.
- Purpose-Specific Documentation: Information organized for the client's needs and applicable municipal requirements.
The result is a professional report that communicates not only what was observed, but also why those findings matter.
Why Hire an ISA Certified Arborist for Reports?
How Much Does an Arborist Report Cost?
The cost of an arborist report depends on the number of trees, inspection complexity, documentation requirements, and intended use. Basic residential reports often cost several hundred dollars, while development assessments, extensive tree inventories, and specialized investigations may require significantly more professional time.
Sound Tree Care provides project-specific proposals based on the scope of evaluation and reporting required.
π Typical Arborist Report Pricing
| Report Type |
Typical Cost |
| Basic Arborist Report |
$450–$1,000+ |
| Tree Risk Assessment Report |
$450–$1,500+ |
| Insurance or Hazard Documentation |
$450–$1,500+ |
| Tree Health Assessment Report |
$250–$750+ |
| Construction Impact Assessment |
$500–$5,000+ |
| Tree Survey & Inventory Reports |
$500–$10,000+ |
β οΈ Factors That Increase Report Costs
- Multiple trees requiring evaluation
- Municipal permitting requirements
- Environmentally Critical Areas (ECAs)
- Shoreline regulations
- Construction or development review
- Advanced decay investigations
- Climbing inspections
- GIS mapping or tree inventory requirements
- Formal documentation for attorneys, insurers, or municipalities
π² Typical Residential Arborist Report Cost: $450–$1,500
Most residential arborist reports for tree removal permits, condition assessments, insurance documentation, and property concerns fall within this range, depending on the assessment scope.
More complex projects involving development review, extensive tree inventories, advanced inspections, or construction impacts are quoted separately.
See the Full Arborist Cost Guide Below
See typical pricing for arborist reports, tree risk assessments, inspections, tree inventories, construction reviews, and other consulting services across the Seattle and Puget Sound region.
By Eric Ledford
•
May 26, 2026
Wondering how much an arborist costs? Compare tree inspection, arborist report, tree risk assessment, tree survey, and consulting prices. Updated for 2026.