Practical reference guides compiled by CanopyMetrics. Independent expertise, no sales pitch.
A 60-second self-assessment that estimates a preliminary Low / Moderate / High risk tier and points you to the right next step — no email required.
Try the screening →Annual on-site walks, written risk updates with a photo log, and a priority response window — built for HOAs and commercial portfolios across the North Bay.
Reserve a pilot slot →Subrogation-ready tree damage documentation: five non-negotiable report elements, California Rule 26 compliance, and North Bay-specific causation arguments.
Read the guide →TPZ requirements, common compliance failures, and the components of a defensible TPZ plan — covering all 10 North Bay jurisdictions.
Read the guide →An annotated walkthrough of an ISA TRAQ Level 2 report — all 8 sections explained with sample lines, risk matrix tables, and defensible methodology notes.
Read the walkthrough →California neighbor tree-fall liability: what evidence to collect, what an arborist report must establish, and how foreseeability determines liability outcomes.
Read the guide →Protected species, permit triggers, arborist report requirements, mitigation standards, and penalties for Marin, Sonoma, and Napa counties — including all major municipalities.
Read the reference →Protected species, permit triggers under Marin County Code § 22.62, removal procedures, and the liability exposure that follows when something goes wrong — written for attorneys, developers, and property owners.
Read the guide →Protected species, permit triggers under Napa County Code § 18.108, removal procedures, and the liability exposure that follows when something goes wrong — written for attorneys, developers, and property owners.
Read the guide →Protected species, permit triggers under Sonoma County Code § 26-88-035, removal procedures, and the liability exposure that follows when something goes wrong — written for attorneys, developers, and property owners.
Read the guide →Protected trees under Chapter 816-6, permit triggers, removal procedures, and liability considerations for property owners, developers, and attorneys in unincorporated Contra Costa County.
Read the guide →Straight answers on arborist report scope, expert witness admissibility, Rule 26 / CCP 2034 disclosures, and engagement timelines — written for attorneys and claims counsel.
Read the FAQ →Anonymized outcomes from North Bay litigation engagements — a Marin County heritage oak TPZ dispute and a Sonoma County insurance subrogation recovery.
Read the cases →Anonymized case-result blurbs from independent arborist engagements in Marin, Sonoma, and Napa — quick orientation on outcomes for attorneys, claims managers, and developers.
Read the case results →A forthcoming reference guide for North Bay developers, architects, and applicants navigating tree-related permitting requirements across Marin, Sonoma, and Napa.
Read the guide →Plain-language answers to the most common property-owner questions about tree-protection ordinances in Marin, Sonoma, and Napa: when permits are required, what counts as a heritage tree, root intrusions, neighbor disputes, removal vs pruning, and replacement requirements.
Read the FAQ →A section-by-section walkthrough of what is in a defensible arborist report — cover/admin, tree inventory, the TRAQ risk matrix, methodology references, and the limitations section. Written for property owners, attorneys, and claims reviewers.
Read the guide →Verify Noel's International Society of Arboriculture certification #PNW-10019A and Tree Risk Assessment Qualification (TRAQ), the qualifications behind independent site assessments.
Review the credentials →A 2025 institutional brief on canopy-cover trends and the drought-stress outlook for Marin, Sonoma, and Napa counties — cited to USDA i-Tree, CAL FIRE, US Drought Monitor, and California DWR.
Read the brief →