California gives homeowners clear protections when they hire a contractor. The Contractors State License Board (CSLB) sets the rules and keeps a public record of every licence. Use both before you sign anything.
How do I find a good concrete contractor?
Collect two or three written quotes for the same scope, check each licence on the CSLB site, and look at finished work that is at least a few years old. A slab that still sits flat after several wet and dry seasons on Solano County clay tells you more than a photo taken the day after the pour. Ask how they prepare the base, because that is where shortcuts hide.
Does a concrete contractor need to be licensed and insured in California?
Licensed, yes, for almost any real job. The CSLB says a licence is required for anyone who contracts for work valued at $1,000 or more, for any job that needs a building permit, or who uses employees. The class for this trade is C-8 Concrete. A licensed contractor must carry a licence bond, and one with employees must carry workers' compensation insurance. General liability insurance is not required for every licence type, so ask for a certificate. You can check the licence, bond and workers' compensation status at cslb.ca.gov or on 800-321-CSLB (2752).
What should I ask a concrete contractor before hiring?
- What is your CSLB licence number and class?
- Do you carry general liability and workers' compensation, and can I see the certificates?
- How deep will you dig, and how much compacted rock goes under the slab?
- What steel, what thickness and what PSI are in the price?
- Where will the joints go, and when will they be cut?
- How will you cure the slab in hot or windy weather?
- Who gets the permits and who calls 811?
- What does your written warranty cover and exclude?
- What is the payment schedule?
What should a written estimate include?
A written estimate should give the measured area, slab thickness, excavation depth, base material, reinforcement, concrete strength, finish, joints, drainage slope, removal and disposal, permits, start and finish dates, the payment schedule and the warranty. The CSLB says home improvement jobs over $500 need a written contract, so the estimate you accept should turn into a signed contract that shows the licence number.
Is a written estimate binding if they hit something unexpected? The signed contract price is binding for the work it describes. Hidden conditions, such as a buried slab, old footings or soft fill, are handled by a written change order that you approve before the extra work is done. A good contract says how unknowns will be priced.
How much deposit is normal?
In California the deposit is capped by law. The CSLB states that the down payment on a home improvement contract cannot be more than $1,000 or 10 percent of the contract price, whichever is less. After that, payments should follow the work completed and not run ahead of it.
A contractor asks for 50 percent up front in cash with no contract. Should I agree? No. A 50 percent deposit is far above the legal limit, the lack of a written contract breaks the home improvement rules, and cash leaves no record. Any one of those is a reason to walk away.
What are the red flags?
- No licence number on the card, truck or quote, or a number that does not match the name on the CSLB record
- A large cash deposit, or pressure to sign today
- A one-line quote with no thickness, base or steel
- No mention of joints, curing or drainage
- An offer to skip a permit that is required
- A price far under every other quote with no explanation
- Leftover concrete from another job offered at a discount
What warranty should I expect?
Expect a written warranty on workmanship, with the length and the exclusions spelled out. Terms vary from one contractor to the next. Most exclude hairline shrinkage cracks, damage from tree roots, soil movement, deicing salt and overloading. Ask exactly what counts as a covered crack, for example a stated width or height difference. A verbal promise is hard to rely on later.
I paid a deposit and the contractor stopped answering. What do I do?
Write to the contractor with a clear deadline, by email and by mail, and keep copies. If the contractor has stopped answering after that, file a complaint with the CSLB at cslb.ca.gov. The board investigates and runs an arbitration program. Every licensed contractor has a licence bond, and the bond company is listed on the licence record, so you can make a claim against it. Small claims court is another route. If the person was unlicensed, report that too.
How do I know they have done stamped work before?
Ask to see it. A contractor who has done stamped work before can give you addresses of jobs two or more years old, show which stamp sets and colors they own, and pour a small sample panel. Stamping is timing work with one chance to get it right, and it is harder in Vacaville's summer heat because the surface stiffens fast. Ask how many people will be on the pour.
What if the crew hits a hidden water line?
The water is shut off at the meter, the pipe is repaired and the question of who pays depends on whether the line was marked. Public utility lines are marked through USA North 811, and a contractor who hits a marked line is responsible for it. Private lines, such as sprinkler mains, pool plumbing and old water service pipes inside the yard, are not marked by anyone. Tell the contractor about every private line you know of, and have the contract say how damage to unknown lines is handled.
About our own company
The Vacaville Concrete Company gives free on-site estimates with measurements and a written quote. Ask us for our current licence and insurance details when we visit, and check them yourself on the CSLB site. We would rather you verify than take our word.
To get an actual price for your job, ask for a free on-site estimate. We measure, look at the soil and the access, and put the quote in writing. Call (707) 385-5848 or text a photo of the area.