Mill Valley: defensible space, inspections, and tree permits
By Michael Schuck, ISA Certified Arborist WE-15750A · Updated 2026-10-20
Who inspects, and what they look for
Mill Valley Fire Department, with MWPA evaluations and a Wildfire Risk Report. Southern Marin Fire's on-demand chipper serves Mill Valley and Tam Valley (415-388-8182). Mill Valley Fire Protection Standard 220 has listed juniper, bamboo, broom, pampas grass, rosemary, cypress, and pines as fire-prone since 2009 and bans shredded bark mulch.
Tree permits and the fire question
Heritage trees: tanbark oak at 65 inches circumference, oak and madrone at 75, redwood at 95 (MVMC 20.67). No fire exemption — 'reducing or eliminating fire danger' is an approval criterion, so the arborist report has to make that case with the condition and the clearance problem. Emergency removal only for immediate threat. Replacement is three trees per 6 inches DBH at 24-inch box; fines start at $1,000 for protected and $5,000 for heritage trees. Mill Valley permits are quoted after a call because the process is heavier than most towns.
Programs and money
MWPA Resident Grant (up to $2,500/yr), Marin Chipper Days, SMFD on-demand chipper, MWPA/RCU low-interest loans from October 2026. Details and links on the Marin County page and resources.
A typical Mill Valley job
A redwood-and-bay canyon lot where the insurer wants 10 feet off the roof and the city protects every redwood over 95 inches around. The plan prunes to clearance (permit-free), irrigates and deadwoods the redwoods, removes the juniper and bamboo at the foundation (no permit), and writes the heritage report only for the one bay that can't be made to work.
Booking
Text or call with the address and the notice or letter. Site consultation $375 ($450 with written opinion), within 7 days. Defensible Space Plan $850. Permit arborist report $750–1,250. Consulting only — no tree work sold or referred. Services and pricing →
Questions we get
Who inspects defensible space in Mill Valley?
Mill Valley Fire Department, with MWPA evaluations and an online Wildfire Risk Report.
Can I remove a tree for fire safety in Mill Valley without a permit?
Heritage trees: tanbark oak at 65 inches circumference, oak and madrone at 75, redwood at 95 (MVMC 20.67). No fire exemption — 'reducing or eliminating fire danger' is an approval criterion, so the arborist report has to make that case with the condition and the clearance problem. Emergency removal only for immediate threat. Replacement is three trees per 6 inches DBH at 24-inch box; fines start at $1,000 for protected and $5,000 for heritage trees. Mill Valley permits are quoted after a call because the process is heavier than most towns.
What programs help pay for vegetation work in Mill Valley?
MWPA Resident Grant (up to $2,500/yr), Marin Chipper Days, SMFD on-demand chipper, MWPA/RCU low-interest loans from October 2026.