Subdivision Review Program

The process of dividing land into parcels is a necessary and important function in the growth of a community. When, where, and how development occurs establishes land division patterns for the community that will last for generations.

Subdivision Review

The DEQ Subdivision Program reviews divisions of land comprising less than 20 acres, as well as condominiums and recreational camping vehicle and mobile home parks, regardless of the size of the parcel where they are located. This review is limited to sanitation facilities, including the water supply, sewage disposal, solid waste disposal, and storm drainage systems.

Subdivisions are reviewed prior to creating the parcels to assure that adequate sanitation facilities can be constructed, operated, and maintained to support each parcel. Planning ahead for proper design and location of the facilities helps protect both our surface and ground water in Montana.

Design manuals have been developed to provide standards for wastewater treatment systems, water supply development, and storm drainage systems. The regulations also set out minimum separation distances between water supply sources and potential contamination sources such as wastewater treatment systems, surface waters, and floodplains.

The regulations and subdivision review are structured to prevent pollution problems through the proper design, location, operation, and maintenance of sanitation facilities.

Subdivision Review Fee Calculation - Effective March 1, 2020


Before DEQ Subdivision approval can be finalized (allowing you to move forward with your project), you must first obtain a water right or have a letter provided by the Department of Natural Resources & Conservation indicating that your usage does not require a beneficial water use permit. For instructions on requesting a determination by DNRC regarding water right requirements visit: DNRC Water Right Inquiry Instructions