5 rules for unincorporated Rockland County, New York.
Verified from official government sources
Rockland County has NO countywide ADU mandate. NY Plus One ADU Act (2022) failed. Town codes largely prohibit or heavily restrict ADUs: Clarkstown, Ramapo, and Orangetown generally require single-family use. Illegal basement conversions in Monsey/Spring Valley are a major enforcement issue.
Rockland County sheds are regulated by town building codes. Clarkstown exempts sheds under 144 sq ft from building permits; Ramapo and Orangetown exempt under 100-144 sq ft. All must meet zoning setbacks (typically 5-10 ft side/rear). Village of Nyack historic district requires HDC approval.
Rockland County garage conversions to living space require town building permits and Certificate of Occupancy amendments. Most towns require replacement parking. Illegal garage apartments are a major enforcement target in Ramapo/Spring Valley. NY Uniform Building Code egress, ventilation, and fire separation rules apply.
Rockland County towns classify carports as accessory structures requiring building permits under the NY Uniform Code. Clarkstown Zoning §290, Ramapo §376, and Orangetown §43 set setback, height, and lot coverage standards. Snow load design required.
Rockland County towns regulate tiny homes through zoning and the NY Uniform Code Appendix AQ. Foundation-built tiny homes must meet minimum dwelling size (typically 400-750 sq ft). Tiny homes on wheels (THOW) treated as RVs. ADU path available in Clarkstown and Ramapo.
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