The owner of the property fronting the tree is responsible for maintenance of trees in the planter strip between the sidewalk and the street. All vegetation in the public right of way must be property maintained by the property owner to allow safe and unobstructed passages of pedestrians and traffic. Vegetation clearance should be 8-foot vertical clearance on sidewalks and 13-foot vertical clearance on streets.
See Petaluma Municipal Code, Chapter 13.10, for information about street tree maintenance.