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Utah contractor classification guide

Utah S310 Contractor License: Does It Cover Your Work?

Utah’s S310 classification covers foundation, excavation, and demolition contracting. The harder question is whether it covers the specific work you plan to offer—or whether you also need a concrete, general, or another specialty classification.

The quick answer

S310 is Utah’s specialty classification for foundation, excavation, and demolition contractors.

It may be the appropriate classification when those activities are the work you contract to perform. Concrete, flatwork, complete-project responsibility, and mixed operations can raise questions involving S260 or a general classification.

The safest way to classify your business is to start with the result you promise the customer—not merely the equipment or materials you use.

An excavator can be used on many kinds of jobs, but owning or operating one is not itself a scope of practice. Likewise, using concrete does not by itself settle whether the contracted operation falls under S260 or S310.

Your decision point

Start with the work you contract to perform

Write down the finished result in plain language before looking at classification codes. Then answer these three questions.

  1. 1

    What finished result are you promising the customer?

  2. 2

    Is excavation, foundation construction, or demolition the main service—or one part of a larger job?

  3. 3

    Do you separately advertise and contract for concrete, remodeling, or complete construction projects?

Your contracted workClassification question to resolve
Excavating a site or trenchDoes the current S310 scope include the complete operation you offer?
Building or repairing foundationsDoes S310 cover the full foundation operation, including the materials and installation involved?
Demolishing structures or portions of structuresIs this standalone demolition or work performed as part of a larger remodel or building contract?
Pouring driveways, patios, sidewalks, or slabsDoes the contracted result align more directly with S260 asphalt and concrete work?
Excavating and then placing concreteIs S310 sufficient for the complete operation, or are S310 and S260 both relevant?
Managing the entire building projectIs a general contractor classification more appropriate than one specialty package?

This table is a triage tool, not a legal classification decision. Its job is to identify the exact boundary you need to resolve in the current DOPL scope.

The three named activities

What the S310 classification covers

Utah’s current application calls S310 the “Foundation, Excavation, and Demolition Contractor” classification. The current rule supplies the controlling scope details.

Foundation

Foundation work

The current S310 scope includes work necessary to construct, alter, or repair piers, piles, footings, and foundations placed in the earth’s subsurface.

Questions to resolve
  • Are you delivering a completed foundation, repairing one, or only preparing the excavation?
  • Does the job include footings, piers, piles, underpinning, or structural-settlement work?
  • Are you also advertising and contracting for standalone concrete placement?
  • If you excavate and pour, does the entire promised result fit S310 or also raise an S260 question?
Main classification boundary: S310 foundation work versus S260 asphalt and concrete work.
Excavation

Excavation and sitework

The current S310 scope expressly includes earth and rock work such as cut, fill, excavation, grading, trenching, backfilling, smashing, and crushing as practiced in construction.

Questions to resolve
  • Is excavation, grading, trenching, or backfilling the service the customer is buying?
  • Is the excavation for a foundation, a utility, site preparation, or another installed system?
  • Does your contract stop after excavation, or continue through another trade’s finished work?
  • Are you responsible for a defined specialty package or the complete engineering or building project?
Main classification boundary: Specialty excavation versus responsibility for the complete engineering or construction project.
Demolition

Demolition work

The current S310 scope includes raising, cribbing, underpinning, moving, and removal of a building, structure, or matter appurtenant or incidental to it.

Questions to resolve
  • Are you separately contracted to remove a structure or part of one?
  • Is the work structural demolition, selective interior removal, or ordinary job-site cleanup?
  • Is demolition the main service or one phase of a remodel you manage?
  • Does removal include concrete, site clearing, or work that crosses another specialty scope?
Main classification boundary: Standalone S310 demolition versus demolition incidental to work performed under another classification.
Real job questions

Common S310 classification questions

Each scenario starts with the customer-facing service, explains why the answer is not automatic, and identifies what to verify.

Does S310 cover concrete flatwork?

Why the answer is not automatic
Sidewalks, driveways, patios, and standalone slabs are finished concrete products, even when excavation and base preparation are part of the job.
Likely classification boundary
S310 excavation or foundation work versus S260 flatwork.
What to verify
Compare the complete service you advertise and contract for with both current scopes. Flatwork raises a direct S260 question.

Does S310 cover concrete foundations?

Why the answer is not automatic
“Foundation” points toward S310, but concrete is also expressly addressed by S260. The material alone does not describe the promised result.
Likely classification boundary
A completed subsurface foundation versus general concrete work.
What to verify
Confirm how DOPL treats your full operation—excavation, forms, reinforcing, placement, and any separately offered concrete work.

Does S310 cover excavation and grading?

Why the answer is not automatic
S310 expressly includes excavation and grading, but the analysis can change when the contract is for a broader engineered site or complete building project.
Likely classification boundary
A defined sitework package versus broader project responsibility.
What to verify
Document where your contracted scope begins and ends, then compare S310 with the relevant general classification.

Does S310 cover trenching?

Why the answer is not automatic
S310 expressly includes trenching, but digging the trench may be only one part of installing pipe, wiring, utilities, or another regulated system.
Likely classification boundary
Trenching itself versus the work installed after the trench is opened.
What to verify
Identify what you install, connect, test, or commission after excavation and compare that work with the applicable trade scope.

Does S310 cover retaining walls?

Why the answer is not automatic
Retaining-wall projects can combine excavation, footings, concrete, masonry, landscaping, and structural load questions.
Likely classification boundary
S310, S260, S230 masonry, and S330 landscape scopes may intersect.
What to verify
Confirm the wall material, what it retains, structural design, excavation, and the complete result your contract promises.

Does S310 cover interior demolition?

Why the answer is not automatic
The current scope refers to removal of a building, structure, or related matter; it does not resolve every selective interior-removal fact pattern by name.
Likely classification boundary
Standalone demolition versus demolition performed as one phase of remodeling.
What to verify
Describe whether structural elements are affected and whether you are hired only for removal or for the completed remodel.

Can I perform both excavation and concrete work?

Why the answer is not automatic
A business can have more than one material service. Utah’s current application generally permits up to three specialty classifications.
Likely classification boundary
S310 alone versus an S310 and S260 combination.
What to verify
Inventory every separately advertised and contracted service, then confirm which classifications DOPL expects for that mix.
Most important comparison

S310 versus S260: foundation and excavation work versus concrete work

“S310 is foundations; S260 is concrete” is too simple. A foundation may be made with concrete, and S260 itself includes related excavation, grading, compacting, and base work. Start with the completed scope in your contract.

QuestionWhy it matters
Are you contracted to deliver a completed foundation?This points toward the foundation portion of S310.
Are you contracted to deliver standalone slabs, patios, sidewalks, or driveways?This raises a strong S260 question.
Do you advertise both foundation and general concrete services?More than one classification may be relevant.
Is concrete one material used to complete another licensed scope?Material alone may not determine the classification.
Are you excavating while another contractor places the concrete?The operations may be divided among separate contractors and classifications.

Classification caution

Redoubt’s guide can help identify the classification question, but the current DOPL scope of practice controls. Confirm unclear combinations before submitting the application or contracting for the work.

Review the current ruleCompare specialty classifications
Project responsibility

Is S310 enough if you manage the entire project?

A specialty contractor contracts for a defined trade package. A general contractor takes responsibility for a broader completed project involving multiple construction trades.

Excavation subcontractor

Prepares the site under a defined excavation package for a builder.

Start with the S310 scope.

Foundation subcontractor

Delivers foundation work as one defined part of a homebuilding project.

Compare S310 with S260 based on the complete operation.

Demolition contractor

Is separately hired to remove a structure and clear the resulting material.

Start with S310 and confirm the removal scope.

Complete rebuild manager

Contracts with the owner for demolition and the completed replacement building.

Compare the appropriate general contractor classification.

Compare general and specialty project responsibility →
Mixed operations

Could your business need S310 plus another classification?

Classification selection is not always either/or. Utah’s current application generally allows up to three specialty classifications; R101 is specifically restricted from being combined with another specialty classification.

Evaluate each material service

  • Mixed operations do not always fit neatly into one classification.
  • An incidental task does not automatically settle the classification question.
  • Separately advertised and contracted services are more likely to create another scope question.
  • Review each material, revenue-generating service—not only the business’s primary label.
Open the current all-classifications application

Service inventory worksheet

Mark every service your business plans to contract for separately, then take the completed list to the current DOPL scopes.

ExcavationYesNo
FoundationsYesNo
DemolitionYesNo
Concrete flatworkYesNo
Complete building projectsYesNo
Other installation work after excavationYesNo
After the scope decision

S310 appears to fit—what comes next?

Keep the application path short and linked. Recheck the current form before filing because requirements, forms, and fees can change.

  1. 1

    Review the current official S310 scope of practice

    Compare the actual contracted work—not only your equipment or materials—with the current rule.

    Open this step →
  2. 2

    Determine whether S310 is the only classification needed

    Resolve S260, other specialty, and general-contractor boundaries before filing.

    Open this step →
  3. 3

    Complete the specialty-contractor pre-license course

    DOPL currently states that specialty contractors require a 25-hour pre-licensure course.

    Open this step →
  4. 4

    Register the business entity and obtain an EIN

    Follow the current entity-registration and federal EIN instructions that apply to the business.

    Open this step →
  5. 5

    Establish the qualifier

    Prepare the qualifier affidavit, business position, ownership, control, and disclosures required by the current application.

    Open this step →
  6. 6

    Obtain the required general liability certificate

    Use the dedicated guide because the DOPL webpage and current application do not state the same aggregate limit.

    Open this step →
  7. 7

    Complete the workers comp or no-employees waiver path

    Choose the document path from the business’s worker setup, not from the S310 code alone.

    Open this step →
  8. 8

    Submit a new application or add the classification

    Use the current contractor application for a new license or the DOPL process for an existing license.

    Open this step →
Preparing your DOPL application?

Route the insurance documents after the classification decision

The application separately requires a general liability certificate covering the licensed scope and either workers comp documentation or a coverage-waiver path, depending on the business’s worker setup.

DOPL’s specialty-contractor webpage currently states a $2 million aggregate liability limit, while the March 2026 application states $3 million. Use the current application and the centrally maintained certificate guide instead of relying on a limit repeated on a trade-classification page.

General liability certificateReview business-name matching, certificate holder, dates, and current limits.Workers comp versus waiverStart with the worker setup and choose the correct document path.Coverage waiver guideFollow the Labor Commission waiver, verification, and renewal workflow.
When the boundary is unclear

When to confirm the classification with DOPL

Ask DOPL to confirm the scope when your revenue-generating service combines classifications, the contract continues into another regulated trade, or the work does not fit the rule’s examples cleanly.

Confirm before contracting when:

  • Excavation continues into utility or system installation.
  • Foundation work includes separately offered concrete services.
  • Retaining walls combine structural, concrete, masonry, or landscape scopes.
  • Interior demolition is part of a broader remodel contract.
  • Your company accepts responsibility for the complete engineered or building project.
Current scope of practiceRead R156-55a-301 and compare S310 with every adjacent classification involved in the contract.Open resource →Current contractor applicationCheck the classification list, qualifier pages, insurance documents, version date, and filing instructions.Open resource →Specialty contractor requirementsUse DOPL’s application page for the course, entity, EIN, worker, and submission paths.Open resource →General classification comparisonCompare specialty work with broader project responsibility without duplicating the full B100, R100, or E100 guide here.Open resource →
FAQ

Questions about Utah’s S310 classification

What is an S310 contractor license in Utah?

S310 is Utah’s specialty contractor classification for foundation, excavation, and demolition work. The current rule includes specified earthwork, subsurface foundation work, and removal of buildings or structures. The official scope controls.

Does S310 include grading and trenching?

The current S310 scope expressly lists grading and trenching among covered earthwork operations. If your contract also includes installing utilities, concrete, or a broader completed project, compare the additional work with the applicable classification.

Is S310 the right license for concrete flatwork?

Standalone driveways, sidewalks, patios, and slabs raise a direct S260 asphalt and concrete classification question. Compare the result you promise the customer with both current scopes rather than deciding from the material or equipment alone.

Can S310 and S260 be held together?

Utah’s current all-classifications application generally allows an applicant to select up to three specialty classifications. Confirm that each requested classification matches the services the business will separately advertise and contract to perform.

Does S310 cover demolition during a remodel?

That depends on the contracted result. Separately contracted removal points toward the S310 analysis, while demolition performed as one part of a complete remodel can raise another specialty or general classification question. Confirm ambiguous scopes with DOPL.

Does owning an excavator mean I need S310?

Equipment ownership does not define the contracted scope. Start with the finished result the business promises, where its responsibility begins and ends, and what—if anything—it installs or constructs after excavation.

Does an S310 applicant need a pre-license course?

DOPL currently states that specialty contractor applicants require a 25-hour pre-licensure course. Verify the approved providers and current application instructions before applying.

What insurance documents does an S310 application need?

The contractor application separately requires general liability documentation and a workers compensation certificate or waiver path based on the business’s worker setup. Use the current DOPL instructions and Redoubt’s dedicated document guides.

Official sources: Utah Administrative Code R156-55a-301, the DOPL Contractor Application—All Classifications (version 20260327), and DOPL’s specialty contractor application page.

Last reviewed: July 13, 2026. DOPL controls licensing decisions and current scope interpretations.