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Build Smarter Beneath the Surface with Modular Systems

Modular Precast Concrete Wall Systems for Underground Structures

About Us

FREESTONE UNDERGROUND LLC is changing the game for below-grade builds with modular precast concrete wall systems for underground structures. Based in Nampa, Idaho, we serve eight Western states with a faster, simpler alternative to traditional underground construction methods.

Freestone Underground LLC
Freestone Underground LLC
Freestone Underground LLC

Build in Days, Not Months

Why wait months when we can complete your underground structure in days? Our systems are pre-engineered, pre-poured, and ready to install—often in as little as ten days from start to finish. Clients from homeowners to contractors are using our wall systems for root cellars, storm shelters, utility rooms, and more.

How It Works

STEP 01

Stamped Plans in a Week

Each project kicks off with stamped building plans delivered within a week.


 

STEP 02

Panels Arrive to Install

The panels arrive to your site ready to go, interlocking like puzzle pieces for a secure fit. No formwork. No curing delays. Just fast, durable concrete walls.
 

STEP 03

Quick Installation

Installation is straightforward. All you need is basic equipment and a small crew. Our kits include everything required for a smooth setup, including stairs, hardware, and instructions.

Quality & Partnerships

We’ve partnered with top providers like Tuff Shed for overhead structures and CXT for concrete lids to give you versatile options based on your finish needs. Every system is manufactured through Heath Specialty Precast, ensuring you get high-strength, reliable components every time.

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Serving the Western U.S.

​If you're in Idaho, our in-house team can install it for you. If you're elsewhere within our service states, we’ll help coordinate with experienced contractors in your area.

Installation is straightforward. All you need is basic equipment and a small crew. Our kits include everything required for a smooth setup, including stairs, hardware, and instructions.

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Stop Waiting. Start Building.

Stop waiting and start building. Contact FREESTONE UNDERGROUND LLC today and take the fast track with our proven modular precast concrete wall systems for underground structures. Our schedule books quickly. Lock in your build window now—space is limited and demand is rising.

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