Idaho law exempts domestic groundwater use from the water-right permit requirement, so a single-family home well used for household needs, limited livestock, and a small amount of irrigation generally doesn’t require its own water-right permit (Idaho Code §§ 42-111 and 42-227). There are statutory limits on what counts as ‘domestic’ — larger irrigation, subdivisions, or commercial use can exceed the exemption and require a permit, and some designated groundwater-management areas have stricter rules. Even an exempt domestic well must be drilled by an IDWR-licensed driller to construction standards, with a well driller’s report (well log) filed with the Idaho Department of Water Resources. Idaho amended several domestic-use statutes in 2025, so confirm the current limits with IDWR. For a home relying on a well, ask whether the use fits the domestic exemption and whether a well log is on file.