About Us
About Us
Freestone Underground LLC was founded in Nampa, Idaho with a clear purpose: make underground construction faster, simpler, and more reliable. What started with solving local builder frustrations has grown into a proven system used across eight western states. Our pre-engineered approach to underground structures shortens installation timelines and cuts down on costly guesswork.
We design, manufacture, and install modular precast concrete wall systems in the West for everything from backyard root cellars and pump houses to underground shelters and utility buildings. Unlike traditional methods that rely on multiple contractors, dry-weather windows, and weeks of plug-and-play scheduling, we offer a streamlined solution that shows up ready to assemble.
Why Choose Freestone?
Our product eliminates delays. Panels are pre-poured, engineered to stand 8 feet tall, and available in multiple widths to match most layouts. Whether your site is residential, agricultural, commercial, or remote, these modular panels are easier to boom into place than to build forms on site. We even offer stamped plans to speed up approvals through your local building department.
Quality & Partnerships
We’ve partnered with trusted names like Tuff Shed and CXT to top off your underground space with structures that are insulated, weatherproof, and built to complement the system below. Whether you install it yourself or use a contractor, our team walks you through every step of the process.
Serving the Western U.S.
Freestone is proud to be the only company offering modular precast concrete wall systems in the West with full-service kits and support. We ship and install in Idaho, Oregon, Montana, Wyoming, Utah, Colorado, Nevada, and Arizona.
Stop Waiting. Start Building.
Don’t let another season slip by while waiting on permits and subcontractors. Get a jump on your underground project now with our modular precast concrete wall systems in the West. Freestone Underground LLC makes fast, durable installs easier than ever—reach out today and see just how quickly your space can come to life.
Other Projects
FREESTONE UNDERGROUND LLC is also a full-service general contractor offering specialty masonry, welding, carpentry, remodeling, and custom stair systems. We also handle exterior concrete tread replacements for apartments and multi-unit buildings.