Portland's Landscaping Rules: The Rules That Matter

Every city handles landscaping rules a little differently. In Portland, Oregon, there are 8 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

Rainwater Harvesting

Portland actively encourages rainwater harvesting; rain barrels and cisterns for outdoor irrigation are allowed with minimal regulation, and indoor use is permitted under Oregon Plumbing Specialty Code.

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Specific penalty amounts for this ordinance are not published in a publicly accessible fine schedule. Contact [Portland code enforcement](https://www.portland.gov/bes/stormwater/cleanriver-rewards) directly for current fines, enforcement procedures, and hearing options.

Portland is more permissive than most cities when it comes to rainwater harvesting. That said, there are still limits.

Weed Ordinances

Portland requires property owners to keep grass, weeds, and nuisance vegetation under 10 inches under PCC Title 29; the city can abate overgrown lots and lien the cost.

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Specific penalty amounts for this ordinance are not published in a publicly accessible fine schedule. Contact [Portland code enforcement](https://www.portland.gov/code/29) directly for current fines, enforcement procedures, and hearing options.

Artificial Turf

Portland allows artificial turf in residential yards subject to PCC Title 24 drainage and stormwater rules; many sustainability programs discourage it in favor of permeable landscape.

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Specific penalty amounts for this ordinance are not published in a publicly accessible fine schedule. Contact [Portland code enforcement](https://www.portland.gov/code/24) directly for current fines, enforcement procedures, and hearing options.

Native Plants

Portland actively encourages native-plant and ecoroof landscaping through Bureau of Environmental Services and Bureau of Planning and Sustainability programs. PCC 33.248 (Landscaping and Screening) governs required landscaping for development, and Portland's Stormwater Management Manual mandates native or drought-adapted plants in vegetated stormwater facilities. Naturalistic and meadow landscapes are exempt from PCC 29.30 grass-height enforcement when maintained as intentional landscape.

Key details: Landscape Code: PCC 33.248 (development landscaping). Stormwater Mandate: Native plants in BES facilities. Certification Program: Backyard Habitat (BPS + Audubon). Turf-Removal Mandate: None (voluntary). Naturalistic Exemption: PCC 29.30 applies only to neglect.

Native-plant landscaping carries no penalties — it is encouraged. The only related enforcement risk is when a 'meadow' or 'wild' yard is actually unmanaged tall grass triggering PCC 29.30 nuisance abatement; documentation of intentional native plantings (a Backyard Habitat certification) is the standard defense. Required landscaping for new development under PCC 33.248 is enforced as a zoning violation under PCC 33.700 with fines starting at $250/day.

The rules around native plants in Portland lean permissive, but that does not mean anything goes.

Tree Trimming

Portland regulates pruning under the same Tree Code (PCC Title 11) that governs removals. Pruning any street tree requires a free Urban Forestry permit under PCC 11.40.020, and pruning that removes more than 15% of the live crown of a street tree or designated Heritage Tree requires a full permit and ANSI A300 standards. Routine clearance pruning of branches encroaching from a neighbor's tree is allowed up to the property line but must not damage tree health.

Key details: Code: PCC 11.40 (Permits) + PCC 11.35 (Topping Ban). Street Tree Pruning: Free permit required. 15% Crown Threshold: Trigger for private-tree permit. Topping: Banned (PCC 11.35.020). Encroaching Branches: May trim to property line only.

Topping a street tree or Heritage Tree under PCC 11.35.020 carries fines up to $1,000 per inch DBH (same as unpermitted removal) and may require tree replacement. Unpermitted pruning that exceeds 15% live-crown removal is enforced as 'damage' under PCC 11.45.030. Damaging a neighbor's tree by over-trimming may also lead to civil liability for treble damages under Oregon ORS 105.810 ('willful trespass to trees').

This is not one of those rules that cities tend to ignore. Portland actively enforces its tree trimming requirements.

Water Restrictions

Portland generally has plentiful water from the Bull Run Watershed and does not impose year-round outdoor watering schedules. The Portland Water Bureau (PWB) operates a tiered drought-response plan under PCC Title 21 with voluntary curtailment (Stage 1) escalating to mandatory restrictions (Stages 2-4) if Bull Run reservoir levels fall. PCC 21.12.230 prohibits waste of water at all times, and PCC 21.16 authorizes emergency curtailment orders.

Key details: Code: PCC Title 21 (Water). Year-Round Schedule: None (no mandatory days). Waste Prohibition: PCC 21.12.230 (year-round). Curtailment Stages: 4 stages (PCC 21.16.020). Water Source: Bull Run Watershed + Columbia South Shore Wellfield.

Violation of a declared curtailment order is enforced under PCC 21.16.030 with civil penalties — typical first-offense fines $100-$500, escalating to $1,000+ for repeat violations, with the option to terminate water service for chronic non-compliance under PCC 21.36. Wasteful-use violations under PCC 21.12.230 typically begin with a courtesy notice; ignored notices can trigger administrative fines and surcharges on the water bill.

The rules around water restrictions in Portland lean permissive, but that does not mean anything goes.

Grass Height Limits

Portland regulates overgrown grass and weeds under PCC 29.20.040 ('Nuisances Affecting the Public Health') and PCC 29.30 (Tall Grass and Weed Abatement Program). Vegetation over 10 inches in height, or that creates a fire or pedestrian-visibility hazard, can be declared a nuisance by Portland Bureau of Development Services (BDS). Owners receive a notice to abate within a set period or BDS will hire a contractor to cut and bill the cost to the property as a tax lien.

Key details: Code Section: PCC 29.30 (Tall Grass and Weed Abatement). Height Trigger: Generally 10 inches. Notice Period: 30 days standard; 10 days fire-season. City Abatement Cost: $400-$1,000 + lien. Enforcing Agency: Portland BDS.

Failure to comply with a PCC 29.30 abatement notice triggers BDS administrative abatement under PCC 29.40, with charges typically $400-$1,000 per cutting, plus a $100 inspection fee. Charges become a tax lien on the property under PCC 29.40.080. Repeat violators may face escalating fines under PCC 29.60 (Civil Code Enforcement) of up to $1,000 per day for chronic non-compliance.

Tree Removal & Heritage Trees

Portland has one of the strictest tree-protection ordinances in the Pacific Northwest. PCC Title 11 ('Trees') requires a permit from Portland Urban Forestry to remove any street tree (any size) and to remove most private-property trees ≥12 inches DBH (diameter at breast height). Removing a tree without a permit can trigger fines up to $1,000 per inch of DBH under PCC 11.45 plus mandatory replacement.

Key details: Code: PCC Title 11 (Trees). Street Trees: Permit required for ANY removal. Private Trees: Permit required at 12" DBH. Max Fine: $1,000 per inch DBH (PCC 11.45). Replacement: 1:1 mandatory or fee-in-lieu.

PCC 11.45 sets civil penalties of up to $1,000 per inch of DBH for unpermitted removal — a 30-inch tree carries a $30,000 maximum fine, plus mandatory replacement and a 5-year monitoring plan. Damage to street trees during construction is fined separately under PCC 11.45.030. Repeated violations can trigger stop-work orders on the property under PCC 24.10 and BDS development-permit holds.

This is not one of those rules that cities tend to ignore. Portland actively enforces its tree removal & heritage trees requirements.

The Bottom Line

Compared to many U.S. cities, Portland gives residents more room on landscaping rules. 3 of the 8 rules here are rated permissive. But permissive does not mean unregulated. There are still requirements, and the city does enforce them when violations are reported.

This guide is based on Portland's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.