At Mountain Contracting LLC, our foundation excavation services give your new home, addition, or commercial building the solid starting point it deserves. From layout and digging to grading and backfill, we handle every stage of the excavation with precision, working carefully through the rocky ground and expansive clay soils common throughout Boulder County. Using well-maintained heavy equipment and accurate measurements, we create clean, level, properly sized excavations that are ready for footings and forms. Whether you’re building a full basement, crawl space, or slab-on-grade foundation, trust our experienced team to keep your project on schedule and your site safe from the first dig to the final backfill.
A properly excavated foundation sets the tone for your entire build. Here’s what you can expect when you trust the job to experienced professionals:
Accurate Dimensions and Depth: Excavations are dug to your plans and below the frost line, so footings sit exactly where your engineer intends.
A Stable, Level Base: A properly prepared and compacted subgrade reduces the risk of settling, cracked walls, and uneven floors.
Better Drainage from Day One: Careful grading and room for footing drains help keep water away from your foundation walls.
Experience with Colorado Soils: We know how to handle buried rock, expansive clay, and high groundwater common in the region.
Safe, Code-Compliant Work: Utility locates, proper sloping or shoring, and attention to local requirements protect your crew, your property, and your inspection.
Foundation excavation prepares your site so footings and foundation walls can be built on solid ground. Here’s how it works:
This process gives your structure a strong, level foundation that’s built to last.
Depth depends on the type of foundation you’re building:
Your engineer’s plans and local building codes set the exact depth for your project.
In many cases, yes. Local building departments often require a soils or geotechnical report for new construction, especially in areas with expansive clay. This report guides how deep we dig and how the subgrade is prepared. If you’re unsure what your project needs, contact us and we’ll help you figure out the next steps.
At Mountain Contracting LLC, most residential foundation excavations take 2 to 5 days. Here’s a quick breakdown:
Backfill is scheduled separately once your foundation walls are complete. For a more specific estimate, feel free to contact us!
Yes. We regularly excavate around existing homes and buildings for foundation repairs, waterproofing, drain tile installation, and additions. We dig carefully to protect your structure, landscaping, and nearby utilities while giving repair crews the access they need.
For dependable foundation excavation services in Boulder, rely on the skilled professionals at Mountain Contracting LLC. We are committed to exceeding your expectations and will handle your property with the highest level of care from start to finish. To learn more about how we can prepare your site for a strong, lasting foundation, call us at 303-888-3580 or fill out our Contact Form to connect with our team.
