How to Find and Vet Subcontractors
A field-tested guide for general contractors who need reliable subs — fast. From initial search to signed agreement, here's the vetting process that protects your schedule and your margins.
Finding the right subcontractor can make or break a project timeline. Whether you're a general contractor building a commercial office or managing a multi-trade residential development, the process is the same: define the scope, search smart, verify credentials, and document everything. This guide covers how to find roofing subcontractors, electrical crews, HVAC specialists, and every trade in between — with an emphasis on license verification and insurance checks, two features built directly into findsub.app.
The Vetting Checklist
Define the scope first
Before you search, list every trade your project needs — roofing, electrical, plumbing, HVAC, concrete, drywall, painting, flooring. A clear scope prevents mismatched bids and delays later.
Verify license status
Every state has a contractor board where you can look up license numbers. Make sure the license is active, in good standing, and covers the specific trade work you need. Unlicensed work can void warranties and create liability.
Confirm insurance coverage
Request certificates of insurance directly from the sub's agent. Verify general liability and workers' compensation are current. Coverage should match or exceed your project's risk profile — don't accept expired or inadequate policies.
Check references and past projects
Ask for at least three recent references from similar project types. Call each one. Key questions: Did they finish on time? Was the quality what you expected? How did they handle surprises or change orders?
Compare apples-to-apples bids
A bid is only useful if the scope is identical. Break bids down by line item — materials, labor, overhead, profit. The lowest total often hides missing scope. A detailed bid from a vetted sub is usually the safer long-term choice.
How to Find Roofing Subcontractors
Roofing is a high-risk, high-skill trade. When you search for roofing subcontractors, don't just look for the nearest crew. Start by confirming they hold a roofing-specific license — some states license roofers separately from general contractors. Ask for proof of manufacturer certifications (like GAF Master Elite or CertainTeed SELECT ShingleMaster) if your project specifies a particular system.
Insurance is especially critical here. Roofing carries elevated workers' comp risk. Verify that coverage is active and that the policy limits match your contract requirements. If the roofer uses subcontractors of their own — common on large commercial roofs — request certificates for those crews too.
Use a directory that lets you filter by trade and verification status. On findsub.app, you can search roofing contractors by state and city, then narrow to license-verified profiles. That saves hours of manual board lookups and reduces the risk of hiring unqualified labor.
Speed Up Vetting With a Contractor Directory
Manual vetting — googling, calling boards, checking insurance certificates — can take days per subcontractor. A modern contractor directory centralizes that work. Look for platforms that pre-verify license status, display insurance details, and collect real reviews from other general contractors.
findsub.app's directory does exactly that. GCs can filter by trade, city, and state; view license verification badges; read ratings; and contact subs directly. It's free to browse, and it replaces the fragmented spreadsheet-and-phone-tag workflow most teams still use.
For labor-specific needs — day-rate help, temp crews, or specialized skill gaps — the labor board lets you post requirements and let qualified workers come to you. It's a faster complement to the permanent-subcontractor search process described above.
Frequently Asked Questions
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