Can I Get a PE Stamp for My Existing Home Plans in Michigan?

Michigan requires the sealing engineer to be in responsible charge of the engineering — the engineer must have exercised engineering judgment over the design. For existing plans, this means independent verification: the engineer recalculates structural elements, checks code compliance under the Michigan Residential and Building Codes, and revises the drawings as needed before sealing. The seal must show the engineer's name, Michigan PE number, and date. Michigan engineers cannot seal work outside their area of competence. Detroit, Grand Rapids, Ann Arbor, and the other cities review the sealed package.

The review starts with the full drawing set: architectural, structural, foundation, and any prior calculations. The engineer checks the design against the design loads — heavy snow in the Upper Peninsula, lake-effect regions — verifies foundation design below frost depth, and recalculates beams, columns, foundations, and the lateral system. Lakeshore erosion and flooding are checked where triggered. Deficiencies get redlined; the drawings are revised until the engineer can take professional responsibility. Bring the geotechnical report, the design criteria, and any prior plan-check comments. Snow-load errors are the item most existing plans miss.

Use this checklist before engaging an engineer for existing plans: • Engineer of record holds an active Michigan PE license, verifiable on the state roster • Plans are complete: architectural, structural, foundation, and prior calculations • Snow loads match the county and site elevation • Frost-depth compliance verified for footings, plumbing, and equipment • Geotechnical report addresses local soils for the specific site • Prior plan-check comments included so corrections aren't repeated • Engineer confirms they'll respond to plan-check corrections on sealed sheets • Seal shows name, Michigan PE number, and date on every sealed sheet