Lot coverage limits in Worcester County are municipal. Worcester RS-7 permits 30% building coverage; total impervious coverage limits typically 50-60%. MassDEP Stormwater Standards apply for >1 acre disturbance.
Lot coverage limits in Worcester County are municipally set because county government was abolished in 1998. The City of Worcester Zoning Ordinance Article IV sets maximum building coverage: RS-7 (30%), RS-10 (25%), RG-5 (40%), BG-4 (no limit with site plan review). Total impervious coverage (buildings + paved driveways + patios + pools) typically cannot exceed 50-60% in single-family districts. Permeable paver systems meeting MassDEP infiltration criteria can receive partial credit. Exceeding lot coverage requires a Zoning Board of Appeals variance or special permit. Worcester's stormwater bylaw (Revised Ordinances Chapter 5) requires stormwater management plans for projects creating 40,000+ sf of impervious area or redeveloping 20,000+ sf. MassDEP Stormwater Standards (314 CMR 21.00 as of 2024) apply to projects disturbing 1+ acre statewide. Shrewsbury, Westborough, Northborough, Grafton, Holden, Auburn, and other Worcester County towns have similar tiered coverage systems. Many towns have aggressive impervious limits to protect public water supplies (Worcester's Quinapoxet watershed, Wachusett Reservoir contributing areas). Wetlands Protection Act (MGL c. 131 §40) limits work within 100 ft of wetlands — effectively reducing buildable area on many parcels.
Exceeding Worcester lot coverage: correction order; may require removal of impervious surface or variance application. Fines $200-$1,000. Unpermitted stormwater work affecting wetlands: MassDEP enforcement under MGL c. 131 §40 up to $25,000/day plus restoration order.
Worcester County, MA
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Worcester County, MA
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Worcester County, MA
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Worcester County, MA
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Worcester County, MA
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Worcester County, MA
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See how Worcester County's lot coverage limits rules stack up against other locations.
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