Foundation Digging for a New House — Staked, Dug to Plan, Backfilled
You have a lot, a survey and house plans, and you need the basement or crawl space hole dug to the right elevation so the footings and walls can go in.
JMB Builders does foundation digging for a new house across the Twin Cities metro and north to St. Cloud. The corners are staked from the survey, the hole is dug to the plan elevation with room to set forms, the footing trench is cleaned out for inspection, and the walls are backfilled after waterproofing, drain tile and inspection. Gopher State One Call before digging. Priced per project after a site visit.
- Priced per project after a site visit
- Dug to the plan elevation from survey stakes
- Backfill after waterproofing and inspection
- Licensed MN contractor BC809005
A new house sits where the foundation hole puts it. If the hole is dug in the wrong spot, too shallow, or too deep and filled back with loose dirt, the footings and every wall above them inherit the mistake. The dig follows the survey stakes and the plan elevations, not a guess.
The hole is dug wider than the house so there is room to set footing and wall forms, work on the outside of the walls and install drain tile. The bottom is left on undisturbed soil at the footing elevation. Soft spots, organic soil or water in the hole are shown to the builder or inspector before anything is poured.
Once the walls are poured, waterproofed or damp-proofed, the drain tile is in and the inspections are passed, the over-dig is backfilled in compacted lifts and rough-graded away from the house.
What you supply
- A current survey with the house staked, or the surveyor's contact to stake it
- Foundation plan with footing and floor elevations
- Building permit in place and the inspection schedule
- Decision on the dirt: stockpile on the lot for backfill, spread, or haul off
- A clear path onto the lot for trucks and equipment
What JMB supplies
- Gopher State One Call locate before digging
- Offset stakes or reference marks checked against the survey before the first bucket
- Topsoil stripped and piled separately so it can go back on at final grade
- Excavation to the plan elevation with over-dig for forms and drain tile
- Footing trench or pad area cleaned out and ready for the footing inspection
- Spoils stockpiled, spread or hauled off as quoted
- Backfill in compacted lifts after waterproofing, drain tile and inspection, and a rough grade away from the walls
How it is priced: per project
Quoted in writing from your photos within one business day. What moves the number:
- Full basement, walkout, lookout or crawl space, and the depth on the plan
- Footprint size and how much over-dig the forms need
- Soil type, buried rock or old fill found on the lot
- Groundwater that needs pumping while the footings go in
- Whether spoils stay on the lot or are hauled off
- Trees, stumps or brush to clear before digging starts
- Imported granular fill needed for backfill or under the slab
Send the survey, the foundation plan with elevations and a few photos of the lot. We walk it and write a firm per-project quote.
How long it takes
A typical house foundation dig takes a few days once the stakes are set. Backfill is a separate visit after the walls are waterproofed and inspected.
How your project works
- 1
Locate, stakes and elevations
Gopher State One Call locate, then the survey stakes and plan elevations are checked and offset stakes set so the corners can be found after the dig.
- 2
Strip topsoil and dig
Topsoil is stripped and piled on its own. The hole is dug to the plan elevation, wider than the house for forms and drain tile, with a ramp out for the equipment.
- 3
Footing prep and inspection
The bottom is cleaned to undisturbed soil at the footing elevation. Soft spots or water are shown before the footing inspection, and footings are formed and poured after it.
- 4
Backfill after the walls
After the walls are waterproofed, drain tile is in and the inspector signs off, the over-dig is backfilled in compacted lifts and rough-graded away from the house.
Foundation Digging for a New House — Staked, Dug to Plan, Backfilled: questions, answered
Who stakes the house before the foundation is dug?
The house corners are staked by a land surveyor from the approved site plan. Before digging, the stakes are checked against the plan and offset stakes are set outside the dig so the corners can be found again once the hole is open. If the lot has no current survey, get that done first.
Why is a foundation hole dug bigger than the house?
The extra width, called over-dig, gives room to set footing and wall forms, stand outside the walls to waterproof them, and lay drain tile around the footing. How much over-dig a job needs depends on the foundation system and the depth. It is backfilled once the walls are done and inspected.
What if the excavator hits water or bad soil?
Groundwater is pumped so the footing area stays dry for the inspection and the pour. Organic soil, old fill or soft spots at the bottom are shown to the builder and inspector before anything is poured, and the fix is decided with them, sometimes with an engineer. Those changes are priced before the work goes further.
Do you keep the topsoil from the foundation dig?
Yes, when there is room on the lot. Topsoil is stripped first and piled separately from the subsoil so it can be spread back at final grade. Mixing it into the backfill wastes it and makes a poor base next to the walls.
When can the foundation be backfilled?
After the walls are poured and cured enough, waterproofed or damp-proofed, the drain tile is set and the required inspections are done. On basement walls the floor framing is often in place first so the wall is braced at the top. Backfill goes in in compacted lifts, not dumped in all at once.
Do you dig foundations for builders as well as homeowners?
Yes. We dig for homeowners building on their own lot and for builders who need the hole dug to their plan and schedule. Either way the quote is per project after a site visit, and the dig starts once the permit and stakes are in place.
Recent JMB work, from our job log
59 installs recorded across 30 Twin Cities communities since Dec 2025. Window and door installs for homeowners and for the builders and dealers we sub for. Counts come straight from our job log; no customer names.
Get a written quote for this job
Three photos and a sentence is enough. You hear back within one business day. Or text the photos to 763-204-2099.
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Read morePage reviewed September 26, 2026 · JMB Builders LLC, MN license BC809005 · All excavation pages
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