For Developers

Home / Do Business With Us / For Developers

Ensuring safe, reliable sewer service for new neighborhoods and businesses

Seated in the fastest-growing county in Wisconsin, the District serves about 407,000 individuals and businesses across 187 square miles. More people are moving to the greater Madison area. This means the construction of new neighborhoods and housing developments by developers, business expansions and changing municipal boundaries.

To ensure safe, reliable and well-designed service to these areas and developments, the District works closely with municipalities and developers to review and approve annexations and sanitary sewer extensions. We also assess charges to recover the costs of adding new infrastructure to the collection system and to accommodate increased flows to the plant.

For questions or assistance with annexations, sanitary sewer extensions, connection charges or new developments / redevelopments,
contact Curt Sauser.

Aerial view of Madison and lakes featuring annexations to the District boundaries for developers.


The District maintains a formal service area boundary in accordance with state statutes. To allow the District to serve new areas, the boundary may be expanded through an annexation.

Schematics on a drafting table showing sanitary sewer extensions for developers.

Sanitary sewer extensions

All projects in the District’s service area that install or modify publicly owned sanitary sewers must be approved by our Commission and the Wisconsin Department of Natural Resources.

Construction worker or developer reviewing plans at a site needing wastewater connections.

Connection charges

Wastewater infrastructure requires significant, ongoing investment to continue to safely, efficiently and reliably operate. Owner communities help recover costs via connection charges to new areas.