How to Vet a General Contractor Without Guessing
Short answer
To vet a general contractor, verify the business and license, review current insurance, check comparable projects and references, and interview the team assigned to your job. Then compare proposals on the same scope and put all accepted assumptions, exclusions, staffing commitments and procedures into the contract documents.
Most owners select a contractor by comparing three numbers and trusting a handshake. Then they spend the next eighteen months managing the consequences of that decision.
Selection is the highest-leverage decision on a construction project. It deserves an actual process.
Qualify before you price
Send a short qualification package before you send drawings. You are trying to eliminate the wrong bidders before they consume your schedule.
- Bonding capacity, both single-project and aggregate, with a surety letter.
- Current backlog and projected staff availability during your build window.
- Three completed projects of similar type, size, and delivery method within the last three years.
- Named superintendent and project manager, with their current assignments and roll-off dates.
- Safety record, including experience modification rate.
- Financial reference from their bank and their top suppliers.
- License verification and insurance certificates at your required limits.
The people matter more than the company
You are not hiring a logo. You are hiring a superintendent and a project manager. Ask for them by name, ask what else they are running, and ask when they actually become available. A strong firm with a stretched team will underperform a smaller firm with the right people on site.
Make the named staff a contract commitment with a substitution clause requiring your approval.
Read the bid, not just the number
A low bid is often a signal, not a bargain. Normalize before comparing:
- Confirm every bidder priced the same scope, allowances, and alternates.
- Compare general conditions and general requirements line by line — this is where staffing assumptions become visible.
- Compare schedule duration; a shorter duration with the same general conditions means a lower monthly staff cost or an optimistic plan.
- Read every exclusion and clarification. Exclusions are where the difference between two bids usually lives.
- Look at contingency, escalation, and allowance carrying. A bid with no escalation in a volatile market is a bid with a change order plan.
Reference calls that actually tell you something
Skip "were you happy." Ask questions that force specifics:
- How many change orders were issued, and what caused the largest one?
- Was the original superintendent there at closeout?
- How were subcontractor payment issues handled?
- What did the punch list process look like, and how long did it take?
- What did they do when something went wrong that was their fault?
- Would you hire this exact team again, not this company?
Watch the subcontractor list
The general contractor assembles most of your risk from their subcontractor base. Ask which trades are self-performed, which subs are already committed, and how many bids they received per trade. Thin coverage in a critical trade is a schedule risk you will inherit.
Interview for behavior under pressure
The interview should not be a capability presentation. Give the team a real problem from your project and ask how they would handle it. Watch whether they ask good questions, whether the superintendent talks, and whether the answers are specific.
Score it, and write down why
Use a weighted scorecard covering price, team, schedule, approach, and references. Weight it before you see the bids so you cannot rationalize afterward. Document the decision. It protects you with lenders, partners, and your own memory a year later.
The takeaway
Contractor selection is a diligence exercise, not a procurement formality. Qualify first, normalize the bids, hire the named people, and score against criteria you set in advance. The premium you pay for the right team is almost always smaller than the change orders you avoid.
Verify the Contractor and the Business
Start with the contractor’s legal business name and South Carolina license information. Confirm the license through the South Carolina Department of Labor, Licensing and Regulation, and make sure the license classification fits the work you plan to award. The name on the license, proposal, insurance certificate and contract should be consistent.
Ask for current certificates of insurance sent by the insurance agent, not a screenshot or an old attachment. Review the types of coverage, policy dates and named insured with your attorney or insurance adviser. Licensing and insurance are minimum checks; neither proves that a contractor can manage your particular project.
Check Comparable Work and Current Capacity
Ask for completed and active projects that resemble yours in scope, construction type, location and owner involvement. Speak with references about change orders, schedule communication, site supervision, closeout and how the contractor handled problems. A polished project list is less useful than direct answers from owners and design professionals.
Capacity matters as much as experience. Ask who will estimate, supervise and manage the work, what else those people are handling and when they can start. Confirm that the team presented during selection is expected to remain assigned after the contract is signed.
Compare More Than the Bottom-Line Bid
Put each proposal against the same drawings, specifications and written scope. Identify allowances, alternates, exclusions, owner-supplied items and assumptions before comparing totals. A lower number may reflect missing work or different quality rather than better purchasing or management.
Ask each contractor to explain major cost differences and confirm what is included in writing. Review payment terms, retainage, change-order procedures, schedule requirements and closeout obligations with the proposed contract. If the documents are incomplete, define how design development and pricing updates will be handled before construction begins.
The goal is not to remove every uncertainty. It is to understand which risks are included in the price, which remain with the owner and how unknown conditions will be documented and approved.
Document the Selection Before Signing
Keep a written record of interviews, reference calls, proposal clarifications and revised pricing. Use the same core questions for each finalist so the comparison reflects the project’s needs rather than presentation style.
Before execution, incorporate accepted clarifications, alternates and exclusions into the contract documents. Confirm the project team, preliminary schedule, reporting process and authority to approve changes. Verbal assurances made during selection are difficult to enforce if they never reach the agreement.
Have the appropriate attorney, insurance adviser and design professionals review matters within their disciplines. Contractor selection is an owner decision, but it should be supported by coordinated legal, insurance, technical and commercial review.
Start With a Consistent Shortlist
Define the project before requesting proposals. Give each candidate the same current drawings, specifications, schedule expectations and instructions. When contractors price different information, the owner cannot make a dependable comparison.
Shortlist firms whose recent work is relevant to the project’s size, construction type and location. Ask who would actually lead the work rather than relying only on the company’s general portfolio.
Interview the People Who Will Run the Job
Meet the proposed project manager and superintendent, not only the person responsible for business development. Ask how they plan procurement, coordinate design questions, document field decisions and report cost and schedule issues.
Use project-specific scenarios. Ask how the team would address long-lead materials, incomplete documents, occupied conditions or an unexpected site issue. The quality and limits of the answer often show whether the team has a working process or is improvising.
Start With Relevant Project Experience
Ask for examples that match the work in scope, occupied or vacant conditions, expected level of finish, and the project’s permitting environment. A contractor experienced in ground-up residential work may not be the best choice for a phased condominium repair, just as a commercial interior contractor may not be suited to coastal site work.
For each example, ask what the contractor self-performed, who managed the job day to day, how the contract was structured, and whether that same team is available for your project. Review completed work when possible and speak with owners about communication, change orders, schedule management, closeout, and how problems were handled.
Verify Licensing, Insurance, and Local Requirements
Confirm the contractor holds the South Carolina license classification and financial group required for the proposed work. Verify the license directly with the applicable state licensing board, and check its status, qualifiers, and any publicly available disciplinary history rather than relying only on a number printed in a proposal.
Request current certificates for general liability, workers’ compensation, and commercial auto coverage, then have the owner’s insurance adviser review limits, exclusions, and required endorsements. Also identify whether the City of Charleston, Charleston County, Mount Pleasant, a barrier-island jurisdiction, or another local authority will issue the permits. Business licenses, floodplain review, design review, tree protection, and trade permits can vary by location and should be assigned before contract execution.
Level the Bids Before Comparing Price
Issue the same drawings, specifications, alternates, and bid instructions to each contractor. Build a comparison by trade and confirm demolition, temporary protection, supervision, permits, testing, utilities, allowances, contingency, bonds if required, and final cleaning are treated consistently. A lower total may reflect an exclusion rather than a more efficient plan.
Separate fixed scope from allowances and unit prices. Ask what assumptions support each allowance, how subcontractor bids were obtained, and which items remain unpriced. Require written clarification of exclusions, owner-furnished items, escalation terms, and change-order markups so the owner can compare expected exposure, not just the initial contract sum.
Use a Pre-Contract Decision Checklist
Before selection, confirm the project executive, superintendent, and estimator; their availability; the preliminary schedule; long-lead procurement plan; subcontractor strategy; site logistics; safety responsibility; quality-control process; and approach to occupied or neighboring properties. Check references for the proposed team, not only the company as a whole.
Before signing, reconcile the final scope and exhibits with the proposal. Confirm the schedule baseline, payment process, retainage, allowance reconciliation, change-order authorization, insurance requirements, lien waivers, dispute provisions, substantial completion criteria, punch-list process, warranties, and closeout documents. Do not authorize early work until responsibility for permits, design coordination, concealed conditions, and owner decisions is documented.
Common questions
- Should I choose the contractor with the lowest bid?
- Not without confirming that each contractor priced the same scope and contract requirements. Compare exclusions, allowances, alternates, staffing and schedule assumptions before treating the totals as equivalent.
- Who should attend the contractor interview?
- The owner should include the advisers responsible for design, cost, schedule, legal or insurance review as appropriate. The contractor should bring the project manager and superintendent proposed for the work, not only a business development representative.
- What should I ask a contractor’s references?
- Ask how the contractor communicated about cost, schedule and field problems, and whether change orders were timely and supported. Also ask whether the proposed team members worked on that project and whether the owner would hire them again for comparable work.