Roofers in Modesto face liability exposure that most trades don’t: you’re working at elevation, on someone else’s property, with crews that can get hurt fast if something goes wrong. Before your next job, make sure you carry the coverage that general contractors and property owners require — and the protection your employees deserve under California law.
The three coverages every Modesto roofing contractor needs
General liability (GL)
Most GCs, property managers, and commercial property owners in Modesto require a certificate of insurance showing at least $1 million per occurrence before they’ll authorize you to touch their roof. General liability handles third-party bodily injury and property damage: a torn gutter, a neighbor’s vehicle hit by falling debris, a visitor who trips over your equipment on the ground. Without it, a single incident can generate a lawsuit that far exceeds the value of the contract.
Workers’ compensation
Under California Labor Code §3700, workers’ compensation is mandatory from the moment you hire your first employee — there are no grace periods and no exemptions for small crews. Roofing is one of the highest-risk trades in California: the Department of Industrial Relations reports roofing consistently among the top occupations for serious injury claims. One fall claim without coverage can exceed your annual gross revenue on a single job, and the California Labor Commissioner can shut down your worksite and levy fines for non-compliance.
Commercial auto
Your ladders, compressors, and materials don’t transport themselves. If your pickup or van is used for business purposes, a personal auto policy typically will not respond to a work-related accident. Commercial auto protects your vehicles and the liability that arises while you’re hauling equipment or driving between job sites in the Modesto area.
Your CSLB license requires a bond, not just a policy
California’s Contractors State License Board (CSLB) requires roofing contractors (Class C-39) to carry a contractor license bond — currently set at $25,000 — as a condition of holding an active license. The bond is not insurance; it is a financial guarantee that protects your clients if you fail to complete work or cause uncompensated damage. You cannot legally bid licensed roofing work in California without it. The bond is typically inexpensive (often under $300/year for contractors with clean records) and is issued through the same broker who handles your GL and workers’ comp.
What does roofing insurance cost in the Modesto area?
Rates vary based on annual payroll, crew size, prior loss history, and coverage limits selected. As a working range for Stanislaus County roofing operations:
- General liability: $2,500–$6,000 per year for small crews with $1M/$2M limits
- Workers’ compensation: $15–$25 per $100 of payroll (roofing carries one of the highest workers’ comp class codes in California)
- Commercial auto: $1,200–$2,500 per year per vehicle, depending on driver history and cargo
- Contractor license bond: $200–$400 per year for most applicants
These are ranges, not quotes. Your actual premium depends on your specific payroll, claims history, and the carriers our agents access on your behalf.
Why an independent local agency beats an 800 number
Insurance City’s parent operation serves 4,500+ active customers across three California offices and wrote 2,080 new policies in 2025. When you call a national aggregator, you reach a rep reading a script. When you call us, you reach agents who write roofing accounts in the Central Valley every week and know exactly what your certificate of insurance needs to say to satisfy a Modesto property manager or GC’s requirements. We shop our commercial carriers to find the right fit for your payroll size and risk profile — no broker fees on standard policies.
We serve Modesto roofing contractors from our Stockton office at 956 W. Robinhood Drive — most commercial policies are quoted and bound without an office visit. Call (209) 670-1556 to get started.
Frequently asked questions
Do I need workers’ comp if I only use subcontractors?
Possibly yes. Under California law, if your subcontractors don’t carry their own workers’ comp policy, the CSLB and California courts may treat them as employees for injury liability purposes. Before you assume your subcontractor arrangement insulates you, verify each sub’s certificate of insurance and confirm it shows active coverage. Your broker can help you review this before your next project starts.
My GC is requiring me to add them as additional insured. What does that mean?
An additional insured endorsement extends your general liability policy to cover your general contractor for claims arising from your work on their project. It’s industry-standard practice for any subcontractor relationship. In most cases your broker can add the endorsement and issue the updated certificate within one business day at no additional premium charge.
What’s the difference between a CSLB bond and insurance?
Your CSLB contractor license bond protects your clients: if you fail to complete work or cause damage you don’t pay for, the bonding company compensates them (and then seeks repayment from you). Insurance protects your business: general liability covers third-party claims, workers’ comp covers your employees’ injuries, and commercial auto covers your vehicles. Both are legally required for licensed C-39 contractors in California — they serve completely different functions and cannot substitute for each other.
I’m a sole proprietor with no employees. Do I still need workers’ comp?
As a sole proprietor with zero employees, you are exempt from carrying workers’ comp on yourself under current California law. However, the moment you add even one part-time employee, California Labor Code §3700 requires coverage with no grace period. Additionally, many general contractors require a workers’ comp certificate regardless of your exempt status before they will permit you on a job site. Talk to your broker about an owner-exclusion policy that satisfies GC requirements while keeping your premium to a minimum.
Insurance City Agency — 956 W. Robinhood Drive, Stockton, CA 95207 — (209) 670-1556. Serving Modesto, Stockton, and the Central Valley by phone. CA License #0I13180.