How to Choose a Concrete Contractor in Denver: A Homeowner’s Complete Guide

Hiring a concrete contractor is one of the bigger decisions a Denver homeowner makes. Done right, a new driveway or patio lasts 30 years. Done wrong, you’re looking at cracks, heaving, and a contractor who won’t return your calls. This guide walks you through exactly how to vet a contractor before signing anything.

Step 1: Verify Their Colorado License

Colorado requires concrete contractors to hold an active state license. You can verify any contractor’s license through the DORA (Department of Regulatory Agencies) public lookup tool at dora.colorado.gov. Check that the license is current, not suspended, and covers the type of work you need. Any contractor who refuses to provide a license number is a red flag.

Step 2: Get at Least Three Bids

Denver concrete prices vary significantly between contractors. Getting three bids lets you spot outliers — both suspiciously low quotes (a sign of cut corners or no insurance) and inflated prices from contractors who don’t need the work. Make sure all bids specify the same scope: thickness, PSI rating, finish type, and what happens with demo debris.

Step 3: Check Their Reviews

Google and Yelp are your best resources. Look at how contractors respond to negative reviews — that tells you a lot about how they handle disputes. A contractor with 200 four-star reviews is more trustworthy than one with five five-star reviews. Look for reviews that mention specific projects similar to yours.

Step 4: Ask About Sub-Base Preparation

Denver’s clay soils are notoriously expansive. The number one cause of concrete failure in Colorado is inadequate sub-base preparation. Ask your contractor how much base material they use, whether they compact it, and whether they use reinforcement (rebar or wire mesh) in the slab. If they dismiss this question, walk away.