Union City, NJ Building Setbacks & Zoning: Lot Coverage Limits (2026)

Lot coverage in Hudson County reflects the extreme density of its urbanized landscape. Jersey City Zoning Ordinance sets maximum lot coverage (buildings plus impervious surfaces) at: R-1 Single Family 40-50%; R-1A 50%; R-3 Rowhouse 70-80%; R-4 Multi-family 80%; R-5/R-6 variable with open-space requirements. Hoboken's 1x1 mile footprint has among the highest lot coverage in NJ — brownstone rowhouse blocks commonly exceed 80% lot coverage by historic right. Hoboken Zoning requires minimum rear yard (15-30% of lot depth) effectively setting max building coverage around 70-85%. NJ DEP stormwater rules under N.J.A.C. 7:8 require stormwater management for new development disturbing 1+ acres or increasing impervious area 0.25 acres or more — important for Hudson waterfront redevelopment. Permeable pavers, green roofs, and bioswales may receive partial coverage credit in some Hudson municipalities. HOAs and condo associations in newer Jersey City developments (Newport, Paulus Hook condos) have additional coverage rules for private patios and balconies. Lot coverage variances require Zoning Board of Adjustment hearing under MLUL.