Worcester County, MA Environmental Rules: Grading & Drainage (2026)

Grading and drainage regulation in Worcester County draws from 780 CMR (Massachusetts State Building Code, 10th Edition), the MA Wetlands Protection Act (MGL c. 131, §40), and local zoning/site plan bylaws. Under 780 CMR 3307 and 1803, grading work requires permits when exceeding thresholds set locally — commonly 100 cubic yards of excavation or fill, or any grading that changes drainage patterns. The City of Worcester's Zoning Ordinance Article IV and most Worcester County town bylaws require grading and drainage plans for site plan approval. 780 CMR 1807 governs retaining walls: walls exceeding 4 feet in height measured from the bottom of footing to the top require a building permit and engineered plans stamped by a MA-licensed Professional Engineer. Surcharge loads (sloped backfill, driveways, structures above) lower this threshold. Drainage must be directed away from foundations per 780 CMR 1804.4 (minimum 6 inches fall in first 10 feet). Redirecting surface water onto neighboring properties violates common-law reasonable use doctrine under MA case law (Tucker v. Badoian, 376 Mass. 907 (1978)). Work affecting wetlands buffer (100 ft) or riverfront (200 ft) requires Conservation Commission approval under MGL c. 131, §40.