BMP and LID Whole Life Cost Tools

In partnership with the U.S. Environmental Protection Agency (U.S. EPA), WERF has developed a new suite of tools to address the costs associated with vegetative roofs, rainwater catchment systems, and bioretention facilities. These tools provide a framework to facilitate cost estimation for capital costs, operation and maintenance costs, and life-cycle net present value. The tools can serve as a format for cost reporting for past, current, and future projects. They also provide users with planning-level cost estimates.

These tools complement an existing suite of BMP whole life cost models for retention ponds, extended detention basins, swales, and permeable pavement developed under a previous WERF project. To access the complete set of tools and accompanying user’s guide, visit