Maine state law uniformly requires municipal opt-in before any adult-use cannabis establishment can operate, while medical dispensaries and caregivers operate under statewide licensing with limited local authority over location, hours, and signage.
Under 28-B M.R.S. section 401 et seq., a municipality must affirmatively authorize adult-use cannabis establishments before the Office of Cannabis Policy may license stores, cultivation, manufacturing, or testing in that town. Towns may also limit numbers, set local licensing fees, and adopt reasonable zoning. Medical cannabis dispensaries and registered caregiver retail stores under 22 M.R.S. chapter 558-C operate under statewide licensing; municipalities may apply standard zoning and operational ordinances but cannot ban registered medical operations entirely. Buffer zones from schools (at least 1,000 feet for adult-use stores under state law) apply universally. Federal preemption around schools and federal property remains in effect.
Operating without state and local authorization can result in license revocation, civil penalties up to $100,000 per violation, and seizure of cannabis inventory by OCP.
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See how Portland's dispensary zoning rules stack up against other locations.
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