Building permits in Unincorporated Rock County

Unincorporated Rock County does not issue residential building permits. Rock County has not adopted the Minnesota State Building Code for its unincorporated area: the Minnesota Department of Labor and Industry jurisdiction lookup lists 12 of 12 townships in the county as 'HAS ADOPTED THE BUILDING CODE: NO' and none with a county building official, so no State Building Code permit is issued there. The Rock County Land Management Office issues a 'Land Use (Building) Permit' (zoning) for new structures outside city limits; this is not a State Building Code permit. State electrical permits from the Minnesota Department of Labor and Industry still apply.

That does not make the work unregulated. The construction standard still applies, trade licensing still applies, and separate approvals such as on-site sewage, floodplain development, and driveway access are handled by other offices. Below are the contact details for the office to ask, plus guides for the projects homeowners ask about most.

Minnesota has one State Building Code (Minn. Stat. 326B.121), which for homes is the Minnesota Residential Code based on the 2018 IRC, and it is the legal construction standard everywhere in the state. Building permits, however, are issued only where the city, township, or county covering Unincorporated Rock County has adopted the code by ordinance; the seven-county metro area and communities that had adopted it by 2008 must keep enforcing it, while many small outstate towns and townships have no building permit program. Electrical work is different: it needs a state electrical permit from the Department of Labor and Industry everywhere except in the cities that run their own electrical inspection program. Minnesota's state permit rule exempts some small work, such as sheds up to 200 square feet and fences up to seven feet, but there is no statewide dollar-value exemption. Confirm with the building office that has jurisdiction over Unincorporated Rock County before starting work.