Milwaukee regulates grading and drainage under Chapter 120 of the Code of Ordinances and the building code provisions of Chapter 200. Property owners must maintain proper drainage so water flows to approved outlets and does not adversely affect neighboring properties. Grading permits are required for significant earthwork, and final grading must conform to approved plans. The Department of Neighborhood Services reviews grading plans as part of the building permit process.
Milwaukee regulates grading and drainage through building and engineering codes. Grading permits required for excavation or fill over specified thresholds, typically 50 to 100 cubic yards. Site grading must direct drainage away from structures and not adversely affect neighboring properties. Drainage swales, French drains, and catch basins may be required. Retaining walls over 4 feet need engineering and separate permits. Compaction testing required for structural fill. Final grade must match approved plans. Property owners responsible for maintaining drainage facilities on their land.
Unpermitted grading: stop-work order and fines $250 to $2,500. Redirecting drainage to neighbors: corrective action required. Slope failure from improper grading: liability and remediation costs.
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