ADU rules in Zeeland, MI — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Ottawa County does not zone. Rules come from your city or township. The City of Holland permits one detached ADU per property with a single detached home, sized 200-800 sq ft, in LDR, MDR, TNR, GMU and PUD districts.
Michigan cities and townships zone under the Michigan Zoning Enabling Act (MCL 125.3201); the county sets no ADU rule. Holland's Unified Development Ordinance § 39-9.07 allows a maximum of one detached ADU on a lot with a single detached principal dwelling. Tier 1 ADUs run 200-720 sq ft (max 35% of the principal dwelling's above-grade floor area); larger lots (9,600 sq ft, 60 ft wide) allow 200-800 sq ft. First-floor height caps at 16 ft, second-floor at 22 ft. Either the principal home or the ADU must be owner-occupied. Application goes to the Zoning Administrator, with notice to owners within 300 feet.
Building without ADU approval, an Infill Design Review and a building permit is a zoning violation; the city can order removal or withhold a certificate of occupancy.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Zeeland's adu rules rules stack up against other locations.
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