The fastest way to pick the wrong demolition contractor in California is to hire on price alone. Demolition generates hazardous waste, requires county permits, and leaves a site that either passes inspection or sits idle while you sort out the mess. The seven questions below will separate qualified contractors from ones who'll create problems you didn't budget for.
We've run hundreds of demolition and debris removal jobs across Tehama, Butte, and Shasta counties since 1999. The contractors we've seen fail tend to fail in predictable ways.
Verify the CSLB License Number First
Before you ask anything else, go to cslb.ca.gov and look up the contractor's license number. California requires demolition contractors to hold either an A (General Engineering), B (General Building), or a C-21 (Building Moving and Demolition) classification. The license record will show whether the license is active, what classifications are current, and whether there are any disciplinary actions on file.
A contractor who can't give you a CSLB number or whose record shows a lapsed or revoked license isn't a legal option. The county won't issue a permit to them, and if something goes wrong on your site, you'll have limited recourse.
Walberg, Inc. holds CSLB License #898860 with A, C-21, and C-22 classifications, all active.
Ask Whether They Hold a C-22 or Work with a Certified Sub
If the structure you're demolishing was built before 1980, it likely contains asbestos. California law requires that any disturbing of asbestos-containing material be done by a contractor with a C-22 (Asbestos Abatement) license. The person doing the work has to be DOSH-certified.
Some general contractors hold the C-22 in-house. Others sub it to a certified firm. Either can work, but you need to know which. Ask directly: "Who does your asbestos abatement?" and ask for that subcontractor's CSLB number too.
If the contractor brushes off the question, that's a serious red flag. Disturbing asbestos without containment is an environmental violation with personal liability attached, and you as the property owner can be held responsible if the contractor cuts corners.
Get the Certificate of Insurance from the Insurer, Not the Contractor
Ask for a certificate of insurance showing general liability and workers' compensation coverage. That's standard. The less obvious step is to call the insurer listed on the certificate and confirm the policy is active. Contractors occasionally provide certificates for lapsed policies. The certificate has the insurer's name and policy number; the call takes two minutes.
On a demolition project, you want to see general liability limits of at least $1 million per occurrence. For fire debris work in a post-disaster county program, the minimums are often higher, sometimes $2 million or more, depending on the county's contractor approval requirements.
Find Out Who Pulls the Permit
Every demolition in California requires a permit from the local building department. The permit ties the work to a licensed contractor of record who is responsible for meeting code and passing inspection. Some contractors ask the property owner to pull the permit themselves, which shifts liability back to you and can be a sign the contractor doesn't want to be on record.
The contractor should pull the permit. Ask directly. If they hesitate, ask why.
In a disaster recovery situation, the permit path is separate from a standard demolition permit and typically runs through the county's environmental health or public works department rather than the building department. Either way, someone qualified needs to be the contractor of record.
Ask Who Does the Pre-Demo Asbestos Survey
Before any demolition starts, California requires a hazardous material survey. A certified industrial hygienist inspects the structure and tests for asbestos, lead paint, and other regulated materials. The results determine what abatement is needed before the wrecking crew shows up.
Good contractors either have an in-house relationship with a certified hygienist or can walk you through finding one. Some bundle the survey cost into their proposal; others expect you to arrange it separately. Know which you're getting before you sign.
If a contractor proposes to skip the survey because "the building is too far gone anyway," walk away. The survey requirement isn't optional in California, and proceeding without it puts both the contractor and the property owner at legal risk.
Ask for the Debris Disposal Plan
Demolition waste isn't all the same. Clean concrete and masonry can go to a recycling facility. Mixed debris with ash, soot, or contaminated soil goes to a permitted landfill. Material that tests above regulatory thresholds gets handled separately.
Ask the contractor to walk you through where the debris goes and how they sort it. A contractor who's done this before can answer without hesitation. If the answer is vague or they say it all goes to the landfill without qualification, they may be disposing of material that qualifies for recycling at lower cost, or they may not be tracking regulated waste the way they should.
Walberg operates a concrete and asphalt recycling yard in Corning. On jobs where concrete qualifies, we route it there instead of a landfill, which cuts disposal costs on larger projects. See our concrete and asphalt recycling page for what we accept.
Ask Specifically About Fire Debris Experience
This matters most in a post-disaster context, but it's worth asking on any residential demo. Fire debris work in a county-declared disaster area isn't the same as a routine residential tear-down. The county has specific contractor approval requirements. The permit path is different. The documentation requirements are more detailed.
If you're clearing a fire-damaged lot, ask the contractor whether they've done debris removal jobs in your specific county after a declared disaster, and ask them to name the fire. A contractor who ran jobs on the Camp Fire in Butte County, the Carr Fire in Shasta County, or the Dixie Fire in Plumas and Tehama counties has dealt with the county approval process firsthand. A contractor who hasn't will be learning on your job.
Walberg ran jobs on all three of those fires. The county approval process, the opt-out paperwork, the soil testing requirements, and the clearance certificate process are things we've worked through repeatedly. Our fire cleanup services page covers what that process looks like.
The Question and Answer Summary
| Question | What a good answer looks like | What to watch for |
|---|---|---|
| What's your CSLB number? | Active A, B, or C-21 license; verifiable at cslb.ca.gov | Hesitation, inactive license, no C-21 |
| Who does asbestos abatement? | C-22 in-house or named sub with active license | "We'll deal with that if we find it" |
| Can I call your insurer to verify coverage? | Yes, here's the contact | Evasion, expired certificate |
| Who pulls the permit? | We do | "You can pull it, it's easier" |
| Who does the pre-demo survey? | Named hygienist or included in scope | Survey isn't mentioned |
| Where does the debris go? | Specific facility names; sorted by type | "The landfill" without detail |
| What fire debris jobs have you run? | Specific fire names and counties | General residential demo experience only |
Common Questions
Do I need a permit to demolish a structure on my own property?
Yes. California requires a demolition permit from the local building department, and in post-disaster situations, a separate fire debris removal permit from county environmental health or public works. Working without one exposes you to stop-work orders, fines, and problems when you try to pull a rebuild permit later.
Can a handyman or unlicensed contractor do demolition work cheaper?
Legally, no. Demolition of structures in California requires a licensed contractor. Beyond the legal issue, an unlicensed contractor has no insurance and no standing to pull permits. If asbestos is disturbed without containment, the property owner can face liability for the cleanup even if a third party did the work.
How do I know if my building has asbestos?
The only way to know is a physical inspection and testing by a certified industrial hygienist. Buildings constructed before 1980 have higher probability, but asbestos-containing materials were manufactured into the mid-1980s in some categories. Don't assume age alone tells you.
What's the difference between C-21 and C-22?
A C-21 license covers building moving and demolition: structural teardown, foundation removal, and site clearing. A C-22 covers asbestos abatement specifically. They're separate credentials. On a pre-1980 structure, you often need both, either from the same contractor or through a certified sub.
What happens if contaminated soil turns up after demolition starts?
The contractor stops the affected area of work, the material gets tested, and a plan is developed for disposal. This can add time and cost to the project. Lots near creeks, known storage tanks, or non-residential prior uses are higher risk. A good contractor flags this possibility upfront rather than letting you find out mid-job.
The Bottom Line
Hiring a demolition contractor in California comes down to verifiable credentials, clear liability, and documented experience. The CSLB check takes five minutes. The insurance verification call takes two. Asking the other five questions before you sign a contract takes less time than sorting out the problems a bad contractor leaves behind.
If you're working through a demolition job in Tehama, Butte, or Shasta County, request a free estimate. We'll tell you what the scope involves before we give you a number.