Lot coverage limits in Rockland County residential zones typically range from 20% to 40% maximum building coverage, with impervious surface limits of 30% to 50%, depending on zoning district. Stormwater management requirements apply to significant coverage increases.
Lot coverage in Rockland is town/village-specific. Clarkstown Code Ch. 290 sets building coverage at 20-30 percent for R-80, R-40, and R-22 residential districts, and impervious coverage at 30-40 percent. Ramapo Ch. 376 generally permits 25 percent building coverage in RR-80/RR-50 zones and 35 percent in R-40. Orangetown Ch. 43 caps single-family building coverage at 25-35 percent depending on zone. Haverstraw and Stony Point follow similar tiers. Villages like Nyack (Ch. 360) have tighter coverage in historic districts. Increases over 1,000 sq ft of new impervious surface trigger NYS DEC MS4 Phase II stormwater review and SWPPP per 6 NYCRR Part 750-2. Slopes over 15 percent and wetlands within 100 feet require additional review under DEC Article 24 and local wetlands laws. County Health Dept reviews septic capacity for any coverage-increasing addition on septic-served properties.
Exceeding coverage: zoning variance required or removal; fines 250-1,000 dollars per day. Unpermitted impervious surface requiring SWPPP: NYS DEC can fine up to 37,500 dollars per day under ECL §71-1929 for stormwater violations.
Rockland County, NY
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See how Rockland County's lot coverage limits rules stack up against other locations.
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