Michigan Building Permits
Find Michigan building permit requirements, construction codes, licensing rules, review timelines, and local approval steps for residential and commercial projects.
Building Codes
Michigan enforces the Michigan Construction Code through the Department of Licensing and Regulatory Affairs and local enforcing agencies. The state building, residential, rehabilitation, mechanical, plumbing, and electrical codes are Michigan-specific versions of the International Codes with state amendments, and applicants should verify the currently effective edition with LARA and the local jurisdiction because code updates phase in by discipline. Energy requirements are contained in the Michigan Energy Code and related commercial and residential provisions, with ASCE 7 referenced for structural loads in engineered designs.
Permit Process
Building permits in Michigan are issued by the local city, township, village, county, or state enforcing agency with jurisdiction over the property. Applicants usually submit an application, construction drawings, site plan, zoning approval, contractor license information, energy forms, and fees before plan review begins. After approval, the project proceeds through required inspections such as footing, foundation, rough framing, insulation, mechanical, electrical, plumbing, and final inspection.
Engineering Requirements
Michigan requires engineering work to be performed by a Professional Engineer licensed by the Michigan Board of Professional Engineers when professional engineering is offered or required by code. A PE or architect seal is commonly required for commercial buildings, structural alterations, large retaining walls, non-prescriptive residential construction, engineered trusses, unusual foundations, and delegated design items. Structural designs should use the applicable Michigan code edition, ASCE 7 loading, local frost depth, snow load, wind exposure, and soil conditions.
Local Licensing
Michigan licenses residential builders and maintenance and alteration contractors through LARA. A licensed residential builder is generally required for contracted work on one- and two-family dwellings, while specialty classifications may apply to roofing, siding, insulation, masonry, concrete, and similar trades. Electrical, plumbing, and mechanical contractors have separate state licensing and permit requirements, and local jurisdictions may require registration before a permit is issued.
Residential Permits
Residential permits are usually required for new homes, additions, garages, decks, finished basements, structural repairs, window changes affecting egress, pools, sheds over local size limits, roofing, siding, and major remodeling. Mechanical, electrical, and plumbing work generally requires separate trade permits even when a building permit is not required. Minor cosmetic work such as painting, flooring, cabinets, and non-structural repairs may be exempt, but zoning rules and homeowners association requirements can still apply.
Commercial Permits
Commercial projects in Michigan require plan review for building code compliance, accessibility, fire protection, means of egress, occupancy classification, structural design, energy compliance, and trade systems. Tenant build-outs, restaurants, industrial spaces, medical uses, assembly occupancies, and changes of occupancy typically require detailed construction documents and sometimes state-level review. Certificates of occupancy or compliance are commonly required before a new commercial space can be used.
County Differences
Michigan has significant local variation because cities, townships, counties, and the state may serve as the enforcing agency depending on location. Some rural areas rely on county or state plan review, while larger municipalities such as Detroit, Grand Rapids, Lansing, Ann Arbor, and Warren have their own permitting portals and local review procedures. Zoning setbacks, lakefront regulations, soil erosion permits, floodplain permits, and septic or well approvals can differ substantially by jurisdiction.
Climate Considerations
Michigan projects must account for frost depth, lake-effect snow, high roof snow loads in northern and Upper Peninsula areas, wind exposure along the Great Lakes, and floodplain risks near rivers and shorelines. Foundation design commonly reflects deep frost protection and drainage for freeze-thaw cycles. Coastal erosion, high groundwater, expansive or unstable soils, and wetland constraints can affect site plans and engineering requirements.
Permit Timelines
Simple residential permits in Michigan may be issued over the counter or within one to two weeks when plans are complete. New homes, additions, and commercial permits often take two to six weeks, depending on plan review workload and whether zoning, health department, fire marshal, or engineering review is needed. Incomplete drawings, missing contractor credentials, septic approvals, or delegated truss and structural details are common causes of delay.