Portland Grass Height Limits Rules (2026) — What You Need to Know
Some RestrictionsKey Facts
- Max Grass/Weed Height
- 10 inches
- Sidewalk Strip
- Owner's responsibility to maintain
- Native Plantings
- Allowed if maintained
- First Violation
- Notice with 30 days to comply
- Enforcement
- Bureau of Development Services
The Short Version
Portland requires property owners to keep grass and weeds below 10 inches on residential lots. That's more generous than many cities that cap at 6 or 8 inches. The city also mandates that you maintain the sidewalk strip (the planting area between the sidewalk and street curb) — that's your responsibility, not the city's. Portland won't cite you for having a meadow-style yard or native plantings as long as they're intentional and maintained, which sets it apart from cities that require a traditional mowed lawn. The Bureau of Development Services handles complaints and inspections.
Full Breakdown
Portland's vegetation management rules (Title 29, Chapter 29.40) balance traditional property maintenance standards with the city's environmentally progressive values. The 10-inch cap on grass and weeds applies to standard turf areas but explicitly exempts intentional landscaping — native meadows, pollinator gardens, and eco-lawns are permitted.
The key distinction is between neglect and design. A yard with 12-inch grass and scattered litter will get cited. A yard with 12-inch native wildflowers, defined beds, and clear pathways won't. Code inspectors look for signs of intentional management vs. abandonment.
The sidewalk planting strip is often a surprise for new homeowners. The city owns this land but requires adjacent property owners to maintain it. You're responsible for mowing, weeding, and clearing debris. Portland encourages replacing grass strips with low-water native plantings and even offers guides for converting them to pollinator habitat.
What Happens If You Violate This?
First violation is a notice to comply within 30 days. If not corrected, the city can hire a contractor to mow your lot and bill you — typically $200-$500 plus a $150 administrative fee. Repeated violations can result in liens placed on your property.
Frequently Asked Questions
Can I replace my lawn with a native plant garden in Portland?
Who maintains the strip between the sidewalk and street?
What happens if I get a vegetation complaint?
How does Portland compare?
See how Portland's grass height limits rules stack up against other locations.