Check Licensing and Registration
Wisconsin doesn't require a statewide concrete contractor license, but that doesn't mean anything goes. Contractors performing work over $500 must register with the Wisconsin Department of Safety and Professional Services (DSPS).[1] Ask for their DSPS credential number and verify it online — it takes about 30 seconds.
Many municipalities in Wisconsin have their own permit requirements too. In the Fox Valley, cities like Appleton, Oshkosh, and Neenah require building permits for driveways, patios, and flatwork over a certain size. Your contractor should know the local rules without you having to remind them.
Verify Insurance Coverage
This is non-negotiable. Every concrete contractor should carry both general liability insurance and workers' compensation coverage. General liability protects your property if something goes wrong during the pour. Workers' comp protects you from being liable if a crew member gets injured on your property.[2]
Ask for a certificate of insurance (COI) and call the insurance company to confirm the policy is active. A legitimate contractor will hand this over without hesitation. If they dodge the question or say they're between policies, walk away.
Get Multiple Written Estimates
Get at least three written estimates for any concrete project. A verbal quote over the phone isn't worth the paper it's not printed on. Written estimates should break down costs for materials, labor, site prep, and any extras like stamping or coloring.
What every concrete estimate should include:
- Total project cost with material and labor separated
- Concrete mix specification (PSI rating — 4,000 PSI minimum for Wisconsin driveways)
- Slab thickness and reinforcement details (wire mesh, rebar, or fiber)
- Site preparation scope (excavation, grading, gravel base depth)
- Timeline with start date and estimated completion
- Payment schedule (never more than 10-15% deposit upfront)
- Warranty terms — what's covered and for how long
- Permit responsibility — who pulls the permit and pays the fee
If an estimate is missing any of these items, ask why. A contractor who won't put details in writing is a contractor who doesn't want to be held accountable.
Ask the Right Questions
The questions you ask tell a contractor whether you've done your homework. Go beyond how much and get into the specifics of how they'll handle your particular project.
| Question | Why It Matters |
|---|---|
| How long have you been pouring concrete? | Experience with Wisconsin's freeze-thaw cycles matters. Look for 5+ years. |
| What PSI mix do you use for driveways? | Should be at least 4,000 PSI with air entrainment for freeze resistance. |
| Do you use air-entrained concrete? | Essential in Wisconsin. Air bubbles let water expand during freezes without cracking. |
| How deep is your gravel base? | Minimum 4-6 inches of compacted gravel for proper drainage in Wisconsin soil. |
| Will you pull the permit? | Reputable contractors handle permits. If they ask you to pull it, that's a red flag. |
| Can I see 3 recent projects? | Drive by completed work. Look for clean edges, even surfaces, proper drainage slope. |
| What's your warranty? | Industry standard is 1-2 years on workmanship. Less than that is a concern. |
Check References and Past Work
Online reviews are helpful, but they're not enough. Ask for three references from projects completed in the last 12 months — and actually call them. Ask the references whether the job was completed on time, whether there were any surprise costs, and how the finished concrete looks now.
Better yet, drive by some of their completed projects. You can learn a lot by looking at a driveway that's been through a Wisconsin winter or two. Check for surface cracking, scaling, proper drainage slope, and clean control joint lines.
Understand the Contract Before Signing
A handshake deal might feel friendlier, but it leaves you exposed. The Federal Trade Commission recommends getting all home improvement agreements in writing, including detailed scope, payment terms, and dispute resolution procedures.[3]
Your contract should include everything from the estimate plus a few extras: a change order process (what happens if the scope changes mid-project), a cleanup clause, and a lien waiver upon final payment. Read every word before you sign.
Watch for Red Flags
Most concrete contractors are honest professionals who take pride in their work. But a few bad actors give the industry a rough reputation. Knowing the warning signs helps you avoid expensive mistakes.
Red flags that should stop you cold: Door-to-door solicitation offering leftover concrete at a discount. Demanding full payment upfront. No physical business address. Reluctance to provide insurance certificates. Pressuring you to skip the permit. Significantly underbidding every other estimate — they're either cutting corners on materials or planning to hit you with change orders.
Payment Best Practices
Never pay more than 10-15% as a deposit. A common payment structure is one-third at signing, one-third at the midpoint, and the final third upon completion and your satisfaction. Hold that last payment until you've inspected the finished work.
Pay by check or credit card — never cash. You want a paper trail if disputes arise later. And get a lien waiver with every payment, confirming the contractor won't place a lien on your property for the amount you've already paid.
- Wisconsin DSPS. "Contractor Registration Requirements." dsps.wi.gov. Accessed February 8, 2026.
- U.S. Small Business Administration. "Hire a Contractor." sba.gov. Accessed February 8, 2026.
- Federal Trade Commission. "Hiring a Contractor." consumer.ftc.gov. Accessed February 8, 2026.