Subcontractor prequalification and compliance

A good GC treats subcontractor selection as a risk-management process, not just a search for the lowest bid. The goal is to answer four questions:

1. Can they legally do the work?
2. Can they actually perform it well?
3. Will they show up and finish on schedule?
4. Will hiring them expose the GC to unacceptable financial, safety, or legal risk?

A typical process looks like this:

1. Build a subcontractor pipeline

Good GCs rarely start from scratch on every project. They develop relationships with:

• Other GCs and construction managers
• Architects and engineers
• Building-material suppliers
• Building inspectors
• Trade associations
• Existing subcontractors
• Local construction networks
• Referrals from project managers and superintendents

They also maintain a preferred-subcontractor database organized by trade, geography, project size, and performance history.

For example:

Electrical → 8 qualified companies → 3 preferred → 2 backups

The best subcontractors often come through referrals from people who have actually worked with them.

2. Prequalify before soliciting serious bids

The GC sends the subcontractor a prequalification package. Depending on the size and risk of the project, this can include:

• Company ownership and legal entity
• Years in business
• Relevant project experience
• License information
• Insurance certificates
• Workers' compensation
• General liability
• Auto liability
• Bonding capacity
• Safety record
• EMR / incident information
• References
• Current workload
• Key personnel
• Financial information
• Litigation/claims history
• W-9 and other compliance documents

Prequalification is essentially asking: "If I give this company a $500,000 package, what evidence do I have that they can responsibly execute it?"

3. Verify the license independently

Don't simply accept a PDF or number supplied by the subcontractor.

For example, in California, the California Contractors State License Board provides an online license database that can show license status, classifications and complaint information.www2.cslb.ca.gov

A GC should verify that:

• The license is active.
• The classification covers the actual scope.
• The business name matches the contracting entity.
• The appropriate qualifying individual is associated with the license.
• There aren't obvious disciplinary or complaint issues.

California's CSLB also provides downloadable lists of licensed contractors by classification, which can be useful for building a subcontractor prospecting list.www.cslb.ca.gov

California CSLB license lookup

4. Verify insurance—not just the existence of a certificate

The GC's insurance requirements should be established before sending the subcontract.

Typical requirements might include:

• Commercial general liability
• Workers' compensation
• Employer's liability
• Automobile liability
• Umbrella/excess liability
• Additional insured status
• Waiver of subrogation
• Primary/noncontributory coverage

The important point is that a certificate of insurance isn't the same thing as having adequate coverage.

A sophisticated GC may have the broker verify the policy directly and require specific endorsements.

California, for example, requires employers subject to workers' compensation law to carry workers' compensation insurance, and CSLB provides mechanisms for verifying coverage.www2.cslb.ca.gov

5. Examine their actual track record

References should be more than:

"Here's John, and he says we're great."

A GC should ask references questions such as:

• Did they finish on schedule?
• Did they stay within the subcontract amount?
• How many change orders occurred?
• Were the change orders legitimate?
• Did they properly staff the project?
• Did they coordinate well with other trades?
• How was their safety performance?
• Did they have quality problems?
• Did they respond to punch-list items?
• Would you hire them again?

That last question is particularly useful.

Even better: visit one of their completed projects.

6. Evaluate the people, not just the company

A subcontracting company might have an excellent reputation but assign an inexperienced foreman to your project.

So the GC evaluates:

• Project manager
• Superintendent/foreman
• Crew size
• Experience with the particular type of project
• Communication habits
• Ability to read plans/specifications
• Ability to coordinate with other trades

Often the GC is really hiring the subcontractor's team, not its corporate name.

7. Compare bids intelligently

The lowest number isn't necessarily the lowest cost.

A GC normalizes bids so that they're comparing the same scope:

A bid that's 15% below everyone else deserves investigation rather than automatic acceptance. CSLB similarly warns that an unusually low bid can indicate an error or omitted work.www2.cslb.ca.gov

8. Check financial capacity

This becomes increasingly important as the subcontract gets larger.

The GC wants confidence that the subcontractor can:

• Make payroll
• Purchase materials
• Maintain adequate manpower
• Survive payment timing
• Handle unexpected costs
• Finish the project without abandoning the job

For larger commercial projects, GCs may request financial statements, bank/bonding information, or other evidence of financial capacity.

9. Check safety performance

For significant commercial or industrial work, safety can become a major prequalification criterion.

The GC may examine:

• OSHA history
• EMR
• TRIR
• DART
• Workers' comp claims
• Written safety program
• Competent-person requirements
• Training records
• Job-specific safety requirements

The question isn't merely "Have you ever had an accident?" It's whether the subcontractor has systems for managing the hazards inherent in its work.

10. Put everything into a formal subcontract

Once selected, the GC should clearly establish:

• Exact scope of work
• Contract price
• Schedule
• Payment terms
• Change-order procedure
• Retention
• Insurance
• Indemnification
• Safety obligations
• Warranty
• Cleanup
• Submittals
• Documentation
• Lien requirements
• Flow-down provisions
• Termination/default provisions

This is where a good prequalification process pays off: the GC isn't discovering fundamental problems after the subcontractor has mobilized.

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What experienced GCs ultimately look for

After all the paperwork, most good GCs are trying to determine something fairly simple:

"If I give this company this scope, will I have to manage the subcontractor—or will the subcontractor manage the work?"

A reliable subcontractor generally demonstrates:

Competence + capacity + communication + financial stability + safety + integrity + predictable performance.

And importantly, the GC keeps score after the project. They record things like schedule performance, quality, change-order behavior, responsiveness, safety, and closeout performance.

That creates a feedback loop:

Find → Prequalify → Bid → Verify → Award → Monitor → Score → Reuse or Remove

That's how a GC gradually builds a dependable subcontractor bench instead of repeatedly gambling on whoever submitted the lowest bid.