Accessory Structures in Arlington Heights, IL (2026)
5 verified accessory structures rules for Arlington Heights, Illinois, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Arlington Heights does not currently permit accessory dwelling units (ADUs) as a by-right use in most residential zoning districts. The Village's zoning ordinance generally limits residential lots to one principal dwelling. Coach houses or secondary units may be possible through a special use permit or planned development process, but approval is not guaranteed and requires public hearings.
Arlington Heights Accessory Dwelling Unit (ADU) Rules
Heavy RestrictionsShed Rules
Arlington Heights allows accessory storage sheds on residential property subject to size limits, setback requirements, and permit thresholds. Sheds under 100 square feet generally do not require a building permit but must still comply with setback and height restrictions. Larger sheds require a permit. Sheds may not be used as habitable space.
Arlington Heights Shed Regulations
Some RestrictionsGarage Conversions
Converting a garage to living space in Arlington Heights is heavily restricted. The Village zoning ordinance requires residential properties to maintain a minimum number of enclosed parking spaces. Converting a garage to habitable space typically requires providing replacement off-street parking and obtaining building permits for the conversion.
Arlington Heights Garage Conversion Regulations
Heavy RestrictionsCarport Rules
Carports in Arlington Heights are treated as accessory structures and require a building permit. They must meet setback requirements and height limits. Carports do not satisfy the Village's requirement for enclosed parking spaces, so they cannot replace a garage for zoning compliance purposes.
Arlington Heights Carport Regulations
Some RestrictionsTiny Homes
Arlington Heights does not permit tiny homes as independent dwelling units on residential lots. The Village zoning ordinance establishes minimum dwelling size requirements and does not recognize tiny homes on wheels as permanent structures. Tiny homes on foundations would need to meet all building code and zoning requirements including minimum square footage.
Arlington Heights Tiny Home Regulations
Heavy RestrictionsLooking for Cook County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Arlington Heights city rules.
Accessory Structures in Cook County →