Landscaping Rules in Portland, ME (2026)
7 verified landscaping rules for Portland, Maine, sourced directly from the municipal code and official government pages.
Verified from official government sources
Grass Height Limits
Portland's Code of Ordinances does not impose a numeric grass-height cap (e.g., 8" or 10"). Overgrown lots are addressed through general nuisance authority under 30-A M.R.S. § 3001 (home-rule) and Chapter 14 (Land Use) buffer and shoreland rules, plus the Landcare Ordinance's encouragement of higher mowing heights for soil health.
Portland Has No Specific Grass-Height Limit; Common-Law Nuisance Applies
Few RestrictionsTree Trimming
Portland Code Chapter 29 protects 'Heritage Trees' on private property in historic districts (Sec. 29-1 through 29-15) and requires a city arborist permit before pruning, removing, or even disturbing roots within 20 feet of any public-place (street) tree (Sec. 29-18, 29-24). 'Tree topping' counts as removal.
Heritage Tree Protection and Street-Tree Permits in Portland
Heavy RestrictionsWeed Ordinances
Portland's Landcare Ordinance (Chapter 34) bans synthetic pesticides on virtually all public and private property, with the notable exception that prohibited pesticides may be used to control plants categorized as invasive by the Maine Department of Agriculture, Conservation and Forestry (Sec. 34-5(a)(4)(viii)). No numeric weed-height cap exists, but Heritage-Tree treatments for Elms and emerald-ash-borer control are also exempt.
Invasive-Species Control and Pesticide Limits Under Chapter 34
Some RestrictionsWater Restrictions
Portland is served by the Portland Water District (PWD), which draws from Sebago Lake — one of about 50 U.S. surface-water supplies exempt from federal filtration. PWD has no current outdoor watering restrictions and no fixed weekly schedule; the only published advisories are boil/do-not-drink/do-not-use water-quality orders.
No Mandatory Outdoor Watering Restrictions in Portland
Few RestrictionsRainwater Harvesting
Maine does not restrict private rainwater collection from rooftops, and Portland has no ordinance prohibiting rain barrels or cisterns. The city encourages rooftop disconnection and on-site stormwater management consistent with Portland's MS4 stormwater program. There is no permit required for a standard above-ground residential rain barrel.
Rainwater Harvesting Is Legal in Portland (Maine Has No State Restriction)
Few RestrictionsNative Plants
Portland's Landcare Ordinance (Chapter 34) explicitly references the Maine Department of Agriculture, Conservation and Forestry Natural Areas Program invasive-species list, and authorizes targeted pesticide use to remove invasive plants on city property (Sec. 34-5(a)(4)(viii)). The city partners with Wild Seed Project and Portland Pollinator Partnership on native pollinator gardens at Western Promenade and Bayside Trail.
Portland Encourages Native Plants; Invasive Species Targeted Under Chapter 34
Few RestrictionsArtificial Turf
Portland does not prohibit residential artificial turf. The Landcare Ordinance (Chapter 34, Sec. 34-5(a)(4)(iii)) specifically carves out 'Hadlock Field applications' — the Sea Dogs' synthetic-turf stadium — from the pesticide and fertilizer prohibitions. Residential artificial turf is treated as an impervious-like surface under Chapter 14 (Land Use) lot-coverage rules.
Artificial Turf Allowed at Hadlock Field; No Citywide Ban for Residential
Some RestrictionsLooking for Cumberland County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Portland city rules.
Landscaping Rules in Cumberland County →