Hennessy Excavation and Development is a residential contractor specializing in site development. Our services include but aren’t limited to, excavation, road/driveway construction, septic and utility trenching and install, asphalt/concrete, waterproofing, framing, and landscaping. Whether you’d like to add an ADU to your property or just want to tie up some loose ends on your project give us a call at 406-209-588six and we will be happy to discuss your project needs.