Built From The
Ground Up.
Keystone Contracting is the single-source groundwork partner for Big Sky, Bozeman, and the Gallatin Valley — from land clearing and foundations to utilities, roads, and year-round snow removal.
One Crew.
Every Phase of Groundwork.
A complete solution from first cut to final grade — precision, professionalism, and a crew that shows up on time and on budget.
Excavation & Site Prep
From land clearing and grading to foundation digging and complex earth moving — your site prepared to the highest standards of safety and precision.
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Utilities & Septic
Precise installation of water lines, sewer lines, and complete septic systems for reliable, safe infrastructure.
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Roads & Grading
Laser-guided leveling, gravel road building, stormwater ditching, and compaction built to handle Montana seasons.
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Retaining Walls & Hardscaping
Natural stone and boulder walls that manage slopes, stop erosion, and add lasting structure and beauty.
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Trucking & Hauling
A reliable fleet delivering gravel, dirt, and rock — plus concrete and asphalt base prep that lasts.
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Snow Removal
24/7 residential and commercial plowing, ice management, and snow hauling with guaranteed response times.
Learn moreTrust, Built From
The Ground Up.
A successful project begins with the right partner. From the first consultation to the final walk-through, we work as a true collaborator on your build.
Done Right, On Time
Specialized equipment and an experienced crew keep every project on schedule and on budget.
Single-Source Solution
Excavation, utilities, roads, and hauling under one roof — fewer subs, fewer headaches.
A True Partnership
Professional, communicative, and respectful from consultation to completion. Your vision, our expertise.
Simple Process.
Serious Results.
From the first phone call to the final walk-through, you always know what happens next.
Site Visit & Quote
We walk your property, talk through your goals, and deliver a detailed, transparent bid — free.
Plan & Schedule
Scope, materials, and timeline locked in. One crew, one point of contact, zero guesswork.
Do The Work
The right equipment and experienced operators — on time, on budget, with a clean site every day.
Final Walk-Through
We grade it, check it, and walk it with you. Done right from the ground up.
The Power Behind
The Finished Product.
Proudly Serving The Gallatin Valley & Beyond
Based in Bozeman, our crews cover roughly a 90-mile radius — bringing the same precision to a Big Sky custom home site as a commercial development in town.
- Bozeman
- Big Sky
- Three Forks
- Livingston
- Belgrade
- Gallatin Gateway
- + Surrounding Areas
Taking on new projects now — call today, usually same-day response.
Let's Break Ground.
Tell us about your project and we'll get back to you fast with expert guidance and a free quote. Prefer to talk? Call us directly.
Talk To The Team
406-214-0606Cdmech@mtkeystone.com
406-581-8903Dthomas@mtkeystone.com
90-mile radius of Bozeman, MT