Aliso Viejo, CA Landscaping Rules: Weed Ordinances (2026)

The City of Aliso Viejo does not set a maximum grass or weed height in section 8.24.010. Its vegetation rules are written as hazard tests, and a property is in violation when the growth meets one of them.

Subsection D, Overgrown or Dead Vegetation, covers vegetation that causes a hazardous condition to pedestrian or vehicle traffic, or that is likely to harbor rats, vermin and other situations likely to cause a hazard to the public safety. Overgrown hedges that crowd a sidewalk or block sight lines fit the first prong, and dense unmaintained growth fits the second.

Subsection A, Fire Hazards, adds any dry or dead shrub, tree, combustible refuse, or waste, or growing material which by reason of its size, manner of growth and location constitutes a fire hazard to a structure, crop or other property. Size, manner of growth and location are the three factors the code names, so the same shrub can be fine in one spot and a nuisance next to a building.

Subsection C, Refuse and Waste, reaches plant debris too: refuse and waste includes trimmings from plants and trees, and keeping any of it on a property for more than seven calendar days is a nuisance. Cut vegetation left piled on a lot therefore has a seven-day clock.

The City of Aliso Viejo Fire Regulations in Chapter 13.04 add a separate duty: section 304.1.3 as amended requires weeds, grass, vines or other growth capable of being ignited and endangering property to be cut down and removed by the owner or occupant of the premises.

Section 8.24.020 puts responsibility on any person who owns, leases or otherwise controls the property and sends punishment to Chapter 1.06. Enforcement begins with a notice or administrative citation, and the city can recover abatement costs through the Chapter 1.06 procedure if the owner does not act.