Cumberland County, ME Accessory Structures: Carport Rules (2026)

Carports — open-sided roofed structures for vehicle storage — are not addressed in any Cumberland County code because the county does not adopt accessory-structure or zoning ordinances. MUBEC, mandatory in all Cumberland County municipalities under 25 MRS §2451, classifies carports as Group U utility structures under the IBC/IRC; structural permits are required for carports exceeding municipal exemption thresholds (commonly 200 sq ft per IRC R105.2). Each municipality sets setback, height, lot-coverage, and design standards through its zoning code. Where a carport is attached to a principal dwelling it is typically counted as part of the principal structure for setback purposes; freestanding carports are accessory structures with separate (often more permissive) accessory setbacks. The Shoreland Zoning Act under 38 MRS §435 imposes a 75-foot setback from the normal high-water mark of protected waters that applies regardless of the local accessory-structure rule. Snow-load compliance is critical: MUBEC adopts ASCE 7 ground snow loads, and Cumberland County interior locations frequently see 60 psf or higher.