Iowa, Mills County Plumbing Permit Regulations and County Ordinances for Unincorporated Areas

Mills County Building and Safety Jurisdiction

Mills County, Iowa, has a Building and Safety Department responsible for administering and enforcing building codes within the county. This department operates under the authority delegated by the County Engineer through the Building Official, who is appointed by the County Board of Supervisors.

Plumbing Permit Requirements for Unincorporated Areas

The provisions of the Mills County Code of Ordinances apply to all unincorporated areas of Mills County, Iowa.

Iowa has adopted the Uniform Plumbing Code (UPC) as its state plumbing code. Local jurisdictions, including Mills County, may adopt additional amendments to the UPC, provided these amendments are stricter than the state code.

For properties in unincorporated areas, plumbing work must comply with the Iowa State Plumbing Code. This means adhering to the standards set forth in the adopted edition of the UPC, along with any specific amendments made by Mills County.

Permits are generally required for plumbing work. The application for a permit typically requires an estimated construction value, which includes the total cost of materials and labor for the plumbing work.

Homeowners in Mills County may be permitted to perform plumbing work on their single-family dwellings and accessory buildings without a license, provided they will occupy the dwelling for at least two years and obtain the necessary permit.

Electrical permits, however, are handled separately by the Iowa Department of Public Safety, State Fire Marshall Division, Electrical Bureau, for permits issued after July 16, 2021.

Resources to Learn More

Note: The following state-wide building codes and regulations apply universally to all jurisdictions within Iowa, including Mills County.

Iowa Plumbing Legislation, Codes, and Guidelines

State Statutes and Plumbing Codes

The state of Iowa regulates plumbing installations through the Iowa State Plumbing Code, which is established under the authority of Iowa Code Chapter 105. The state has adopted the 2024 edition of the Uniform Plumbing Code (UPC), published by the International Association of Plumbing and Mechanical Officials (IAPMO), as the base technical standard. This adoption is codified in the Iowa Administrative Code (specifically Chapter 25), which includes state-specific amendments to the model code. Local jurisdictions in Iowa are prohibited from adopting other plumbing codes, though they may adopt additional amendments provided those requirements are stricter than the state-adopted code.

Regulatory Board and Agencies

The primary state entity responsible for the regulation and licensing of plumbing professionals is the Iowa Plumbing and Mechanical Systems Board (PMSB). The board operates under the Iowa Department of Inspections, Appeals, and Licensing (DIAL). The PMSB is tasked with licensing individuals at various levels—including apprentices, journeypersons, masters, and contractors—and overseeing the enforcement of state laws and technical standards related to plumbing and mechanical systems.

Resources to Learn More

Select a City in Mills County

If your project is located within incorporated city limits, you will likely need to follow municipal ordinances rather than county rules. Select your city below to view local regulations.

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