A new-home foundation dig runs $1,500 to $10,000 and a basement dig $10,000 to $30,000 on HomeGuide's national 2026 pages. In Hennepin and Ramsey counties, Minnesota's code sets frost footings at 3.5 feet, and nearly every house has a full basement.
All dollar amounts here are national ranges from HomeGuide, never our own prices for a Twin Cities job. Frost, glacial clay or sand, groundwater near the lakes, alley access and haul distance all move the real cost. The HomeGuide pages were checked in October 2026.
What does foundation excavation cost for a new Twin Cities house?
Foundation excavation for a new Twin Cities house is $1,500 to $10,000 nationally on HomeGuide, and $20,000 or more for a big foundation in rocky ground, boulders or heavy clay. Those numbers cover excavation only. A whole unfinished basement foundation runs $70,000 to $100,000 by HomeGuide's foundation page.
What does basement excavation cost for a teardown rebuild in Minneapolis?
Basement excavation for new construction is $10,000 to $30,000 over 2 to 4 days in HomeGuide's basement section. An 8 to 9 foot dig in normal soil is $10,000 to $20,000, a 10 to 12 foot dig $20,000 to $30,000, and difficult or rocky ground $30,000 to $50,000 or more. HomeGuide's project table shows a lower range, but the basement section is the one written for this. On a teardown, removing the old basement is a separate demolition line.
Can an old Twin Cities house have its crawl space dug out or its basement floor lowered deeper?
Digging out a crawl space or lowering a basement floor deeper is common in old Twin Cities houses with short basements, but it is structural work. HomeGuide puts a new basement under a house with a crawl space at $20,000 to $45,000 or more for excavation alone. An engineer, a permit and underpinning by a foundation contractor are needed; we dig under their plan.
What does it cost to excavate around the foundation for drain tile or waterproofing?
Excavating around the foundation of an existing house costs $5,000 to $15,000, or $100 to $250 a linear foot, according to HomeGuide, and exterior waterproofing $6,000 to $18,000. Stone foundations in older Minneapolis and St. Paul homes and bowed block walls from the 1950s are the most common reasons we open a wall.
How far out from the basement wall do you dig for a repair?
For a basement wall repair, we dig about two to three feet out from the wall, enough room for the crew, with the sides sloped or braced on a deep dig. On a tight city lot with the neighbor's house close by, we may have to shore instead of slope. The depth itself comes from the repair firm or the engineer.
Can you excavate beside an old stone foundation without damaging it?
Yes, excavating beside an old stone foundation without damaging it is possible with the right method: short sections, no bucket against the wall, hand digging at the stone and quick backfill. Rubble stone walls have little strength once the soil is removed, so we never leave a long section of one exposed.
How deep do footings have to be in Minneapolis?
Footings in Minneapolis have to reach 3.5 feet (42 inches) for frost protection under Minnesota Rule 1303.1600, which covers Hennepin and Ramsey counties; northern Minnesota counties use 5 feet. The rule allows a shallower depth only when an engineer competent in soil mechanics shows it is safe. The plans and the city inspector confirm the footing depth for your project.
What does backfilling a new basement cost?
Backfilling a new basement is usually part of the dig, and extra backfill runs $5 to $25 a cubic yard by HomeGuide's trenching page. Clean, granular backfill placed in layers drains better and pushes less on a basement wall than clay till does when it freezes.
A neighbor's teardown dig cracked my foundation. Who is responsible?
When a neighbor's teardown dig seems to crack your foundation, who is responsible depends on the cause, which an engineer has to judge. Photograph and measure the crack right away, with dates, and tell the neighbor, the builder and the city in writing. Photos from before the dig help most. This is general information about Minnesota, not legal advice.
What does excavation for a walkout or a basement egress door cost?
HomeGuide gives no figure for walkout or egress door excavation. The dig is similar to excavating along a foundation, $100 to $250 a linear foot, and cutting the wall needs a structural design and a permit. In Minnesota, the area outside a walkout or a lower door needs a drain so melt water does not pool at the threshold.
Need a real price for your Twin Cities property? Call or text (612) 688-4650; we walk the site first and then send the scope and price in writing.