Foundation & Basement Excavation in Castleton, VT
John Trombley Construction digs foundations and basements for new builds and additions across Castleton, Rutland, Middlebury, Lake George, and the surrounding area — excavated to depth, on stable ground, and ready for your foundation crew.
It's the part of a build nobody sees once it's finished, and the part that causes the most expensive problems when it's done wrong. Wrong depth, poor drainage, or a hole cut into unstable material and you're paying for it long after the house is up.
We handle the excavation and earthwork. The concrete and forming is your foundation contractor's work — we make sure they arrive to a hole that's dug right, at the right depth, on ground that will hold.
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What a Foundation Dig Involves
Digging Below the Frost Line
Vermont's building code sets a minimum foundation depth of five feet, and footings have to sit below the frost line. Dig shallow and frost heave will lift and crack the foundation over the winters until something fails.
Working Through Ledge
Shallow bedrock is a fact of life around here — slate to the west, marble under Rutland. We work through or around it to get you to proper depth rather than stopping short and hoping.
Drainage & Backfill
Footing drains, clean stone, and backfill placed and compacted so water moves away from the wall instead of sitting against it and finding its way into the basement.
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The Hole Matters as Much as the Foundation
A foundation is only as good as what it sits on and what surrounds it. Undisturbed, load-bearing ground at the right depth, drainage that actually moves water, and backfill compacted in lifts rather than pushed in loose and left to settle.
Cut corners on any of those and the symptoms show up later as a wet basement, a settling corner, or a cracked wall — problems that cost far more to chase afterward than they ever would have cost to prevent.
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Digging in Vermont Ground
Two things shape almost every foundation dig in this region: how deep the frost goes, and how deep the rock sits. The code minimum of five feet is straightforward enough on good soil. It's a different job when the ledge shows up at three.
Around Fair Haven and Poultney that's Taconic slate, often close enough to the surface to matter. Under Rutland it's marble and limestone, frequently jointed and shallower than people expect. Over the top of both sits glacial till — stony, bouldery, dense material that slows a bucket down.
None of that stops a foundation going in. It does change the approach, the equipment, and the timeline, which is exactly why we walk the site before quoting rather than pricing a hole sight-unseen.
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We provide foundation & basement excavation throughout Castleton, Middlebury, Lake George, and the surrounding region. See the full list on our service areas page.
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CastletonFrequently Asked Questions
Vermont's building code sets a minimum foundation depth of five feet — 60 inches — with footings and any buried water or sewer lines below the frost line. That depth is what keeps frost heave from lifting and cracking the structure over successive winters.
It's common around here and it isn't a dead end. Depending on the rock and how much is in the way, we work through it or adjust the approach to still reach proper depth. We'll tell you what we're seeing and what it means for the cost before we go further, not after.
No — we're an excavation contractor. We dig the hole, handle the earthwork and drainage, and backfill once the foundation is in. The forming and concrete is your foundation contractor's scope, and we're used to coordinating with them so the schedule works.
It comes down to the size of the hole, the ground we're digging in, how much ledge we hit, and how easy the site is to get equipment onto. We walk the property before quoting so the number reflects your actual site. The estimate is free.
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