What should an excavation contract include?

An excavation contract should include the parties and license number, a detailed scope with site plan reference, the pricing method (lump sum or unit rates by cubic yard or linear foot), who is responsible for utility locates, an unsuitable-soils and rock clause, spoil and haul-off terms, site access and dewatering responsibility, the timeline, change orders, insurance and indemnity, and signatures. Subsurface unknowns are why the rock and soils clauses matter most.

Should excavation be priced lump sum or by unit?

Use unit pricing when quantities are uncertain, which is most of the time in dirt work. Price by the cubic yard for cut and fill or by the linear foot for trenching, with a stated quantity estimate and a unit rate for anything over. Lump sum only makes sense when the survey and soils are known and the scope is tight. Unit pricing protects you when you hit more material than the plan showed.

Who is responsible for calling 811 utility locates?

The contract should name it explicitly. In most cases the excavator calls 811 before digging because the law puts the duty on whoever moves the dirt, but private utilities past the meter are often the owner's responsibility to mark or disclose. Spell out who calls public locates, who handles private locates, and who pays if an unmarked line is hit. Ambiguity here is expensive.

What is an unsuitable-soils or rock clause?

It is the clause that lets you charge for conditions you could not see when you bid. If you hit rock, groundwater, buried debris, or unsuitable fill, the clause defines how that extra work is documented, priced, and approved before you proceed. Without it, you eat the cost of every surprise underground, and on excavation jobs there are always surprises underground.

Excavation contract template: what to include

An excavation contract template should cover scope tied to a site plan, the pricing method (lump sum or unit rates by cubic yard and linear foot), utility-locate responsibility, an unsuitable-soils and rock clause, spoil and haul-off terms, site access and dewatering, the timeline, change orders, and indemnity — signed by both parties with your license number on it. The clauses that save you on dirt work are the ones about what's underground, because that's the part nobody can see when they bid.

We build websites and lead systems for contractors, not legal documents — so treat this as a practical field checklist, not legal advice. Below is a clause-by-clause guide to what protects you and the property owner, plus the one step you shouldn't skip before running any template on a real job.

The clauses that matter on dirt work

📐 Scope tied to a site plan

Reference the survey, grading plan, or sketch by date and revision. State the work — strip, cut, fill, trench depth, backfill, compaction spec — and what's excluded. "Excavate for the foundation" invites argument; a referenced plan with depths and a compaction standard does not.

📏 Unit pricing, not just lump sum

Price by the cubic yard for cut and fill and by the linear foot for trenching, with a quantity estimate and a unit rate for overage. Quantities in dirt are guesses until you dig. Unit rates let the price follow the actual material instead of stranding you on a fixed number.

🪨 Unsuitable-soils and rock clause

The single most important clause. Define how rock, groundwater, buried debris, or unsuitable fill gets documented, priced, and approved before you continue. Without it you eat every underground surprise — and there's always a surprise underground.

⚡ Utility locates and 811

Name who calls public 811 locates, who marks private lines past the meter, and who pays if an unmarked utility gets hit. The law puts the duty on whoever digs, so make the owner's disclosure of private lines a written obligation.

🚚 Spoil, haul-off, and dewatering

Who owns the spoil, where it goes, and what import fill costs. Whether dewatering is included or extra. Site access and where equipment and trucks can stage. These line items are where margin quietly disappears if left vague.

🛡️ Insurance, indemnity, signatures

Your insurance, an indemnity clause for damage to unmarked utilities the owner failed to disclose, your license number, required state notices, and dated signatures. Dirt work carries real liability, so this section isn't boilerplate.

Before you use any template

A free template is a fine way to learn the structure, but don't run real jobs on a generic one. Contract and mechanics-lien law varies by state, and excavation carries specific exposure — utility damage, erosion control, stormwater permits. Have a local construction attorney review your template once before you use it. Paying for one review is far cheaper than one hit gas line or one unpriced rock excavation.

When a template is all you need

Honest take: most excavation outfits don't need contract software. A solid, attorney-reviewed template is plenty if:

• You run a few jobs a month and a clean PDF with unit rates you reuse covers them. Don't buy a platform you won't open.
• Your real bottleneck is enough quality work to keep the machines busy, not paperwork. Fix the lead flow first.
• You're disciplined about the rock and change-order clauses. The clause protects your margin more than any tool that stores it.

Where we actually help

The contract protects the job — our part is getting you to the table in the first place. We build excavation and site-work sites that show your equipment, finished grading and pad projects, your license, and reviews, with an AI assistant that captures quote requests around the clock so you have more good dirt jobs to bid. We run this stack on our own home-service companies first.

Plans: $249/mo (site, AI lead capture, hosting), $597/mo (adds the SEO content engine and lead attribution), and from $1,750/mo (adds a custom CRM and reputation automation). Month-to-month, you own everything, free working demo in 48 hours.

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Common questions

Lump sum or unit pricing for excavation?

Unit pricing when quantities are uncertain, which is most dirt jobs — price by cubic yard for cut and fill, linear foot for trenching, with a rate for overage. Lump sum only when the survey and soils are known and the scope is tight.

Who calls 811 for utility locates?

Spell it out. The excavator usually calls public 811 locates because the law puts the duty on whoever digs, but private lines past the meter are often the owner's to mark or disclose. Name who calls, who marks, and who pays for an unmarked line.

Why does the rock clause matter so much?

It lets you charge for conditions you couldn't see when you bid. It defines how rock, groundwater, or buried debris is documented, priced, and approved before you proceed — so an underground surprise doesn't come out of your margin.