Landscaping Rules in Tualatin, OR (2026)
5 verified landscaping rules for Tualatin, Oregon, sourced directly from the municipal code and official government pages.
Verified from official government sources
Grass Height Limits
Tualatin caps lawn grass at ten inches under TMC 6-4-090 (noxious vegetation) and reinforces it in TMC 6-13-040 for rental housing. Enforcement runs March 1 through October 31, the prime growing season for pollen and seed production.
Tualatin OR Grass Height Limit (TMC 6-4-090, 6-13-040)
Some RestrictionsTree Trimming
Property owners are responsible for maintaining adjacent sidewalks, tree grates, and planter strips in good condition. Trees and shrubs must be trimmed to prevent hazards. Owners may be liable for injuries caused by negligent sidewalk and vegetation maintenance.
Tualatin Tree Trimming Rules
Some RestrictionsTree Removal & Heritage Trees
Tualatin Development Code Chapter 33 regulates removal of any tree eight inches or larger in diameter (measured 4 feet above grade) on private property. Homeowners may remove up to four qualifying trees per calendar year without a permit, but heritage trees and site-plan trees always require review.
Tualatin OR Tree Removal Permit (TDC Chapter 33)
Some RestrictionsWeed Ordinances
TMC 6-4-090 prohibits noxious vegetation on any property between March 1 and October 31. Listed nuisance plants include uncontrolled blackberry, tansy ragwort, poison oak and ivy, and any weeds taller than 10 inches that harbor vermin, shed noxious pollen, or pose a fire hazard.
Tualatin OR Noxious Weeds (TMC 6-4-060, 6-4-090)
Some RestrictionsWater Restrictions
Tualatin has no mandatory day-of-week outdoor watering schedule. The city buys water wholesale from the Portland Water Bureau and asks residents to follow the Regional Water Providers Consortium's voluntary Weekly Watering Number guidance from April through September.
Tualatin OR Water Conservation (Voluntary Weekly Watering Number)
Few RestrictionsLooking for Washington County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Tualatin city rules.
Landscaping Rules in Washington County →