Excavation on Raw Land: What It Costs and Who Does What

What does an excavation contractor do on raw land?

An excavation contractor moves earth: digging foundations, septic and utility trenches, ponds, and cutting or filling ground to the grades your builder needs. On a raw-land project, they're often on site more days than any other trade.

Typical raw-land jobs include:

• Foundation and basement digs for the house
• Septic tank and drain field excavation (often done by the septic installer)
• Utility trenches for water, power and sewer lines
• Driveway cuts and culverts
• Pond and drainage work
• Rough and finish grading around the build site

Many land contractors do clearing, excavation and grading under one roof. Others specialize. Knowing which you need saves you a second mobilization fee.

How much does excavation cost?

Most excavation is priced at $2.50 to $15 per cubic yard for defined bulk work, or $100 to $300 an hour for machine and operator. Both are real prices. Which one you get depends on how well the job is defined.

A clear scope — "dig a 40×60 basement 9 feet deep" — gets priced by the yard. Open-ended work like stump pockets, rock or "level this area" usually gets billed by the hour.

Three lines surprise people most:

1. Mobilization: $750 to $1,000 per machine to haul it to your site.
2. Disposal: hauling and dumping spoil can be 20% to 40% of the bill.
3. Minimums: most contractors won't start a machine for less than $500 to $800.

Full breakdown in our excavation cost guide. For basements specifically, see basement excavation cost — $10,000 to $30,000 for a typical new-construction dig. Or run your own numbers in the excavation cost calculator.

Excavation vs grading vs land clearing — who do I call first?

Land clearing comes first, excavation second, grading last. Each is a different job, even when one company does all three.

If you hire one contractor for all three, you pay mobilization once. That alone can save $1,500 to $3,000 on a typical site.

Do I need permits and an 811 call?

Yes — 811 is free and required before any digging, and most counties require a grading or building permit for larger jobs. Rules vary by county, so check before the machine arrives.

• 811: Call or file online a few business days before digging (each state sets its own notice period). Utility owners mark buried lines for free.
• Building permit: Foundation excavation is usually covered by your house permit.
• Grading permit: Many counties require one above a set volume or area of earth moved.
• Stormwater: Disturbing 1 acre or more triggers a federal Clean Water Act stormwater permit (NPDES), usually handled through your state.

On septic jobs, the septic permit governs the excavation. Keep heavy machines off the approved drain field area — compacted soil can fail a later inspection.

Why does soil type change the bid?

Soil decides how fast the machine digs, whether the walls stand up, and whether you can reuse the dirt. It's the single biggest variable on most excavation quotes.

• Sand and loam dig fast and cheap but may need shoring or sloped walls.
• Clay digs well when dry, turns to grease when wet, and swells — rain delays are common.
• Rock can triple the cost. It may need a hydraulic breaker or, rarely, blasting.
• High groundwater means pumping out the hole as you dig.

Look up your soil free on the USDA Web Soil Survey before you request bids. Contractors take you more seriously when you already know.

Is excavation dangerous for the crew?

Trench collapse is one of the deadliest hazards in construction, so OSHA requires protection on trenches 5 feet deep or more. That means sloping, benching, shoring or a trench box, unless the trench is entirely in stable rock.

Ask your contractor how they'll protect deep trenches. A crew that says "we don't need a box" on a 7-foot septic or basement trench is a red flag — and a liability on your property.

How long does excavation take?

Most residential digs take one to five days of machine time. A basement often takes two to four days; a septic system one to two; a utility trench a day.

Weather drives the rest. Clay sites can lose a week to rain. Ask how the contractor bills weather days and standby time.

How do I compare excavation bids?

Line them up item by item, not by the total. A low bid often leaves out hauling, rock, or mobilization.

Ask every contractor:

• Is the price per cubic yard, per hour, or lump sum?
• Is mobilization included? For how many machines?
• Where does the spoil go, and who pays the dump fee?
• What happens if you hit rock or water?
• Are you insured, and who calls 811?
• Do you also do clearing and grading?

What comes next?

After excavation, the trades that need the open ground follow: septic installation, well drilling, foundation, then the gravel driveway. See the full sequence in how to prepare land for building a house.