Experience a new standard of dirtwork.

Castlerock Excavating is a leading excavation general contractor. We are located in Billings, Montana and you’ll find many of our successful projects in our Montana and Wyoming service area.

Proud Member

Licensed. Bonded. Insured.


  • Sewer, Stormwater, and Water Installation
  • Grading & Site Work
  • Foundations
  • Pipe Bursting

We have over 25 years of experience in all types of excavation projects throughout the region. We strive to deliver the highest level of service in the industry at a competitive price. more >


Install new pipelines in the same or larger diameter with minimum excavation. more >