1. Verify the CSLB License (Non-Negotiable)
Every California roofing contractor must hold a C-39 Roofing license from the Contractors State License Board. Check it yourself at cslb.ca.gov — confirm:
- ✓License is active (not suspended or expired)
- ✓Classification includes C-39
- ✓No unresolved disciplinary actions
- ✓Workers' comp insurance is current
No license = no hire. Ever. Unlicensed roofers can't pull permits, carry no required insurance, and you have zero CSLB recourse if things go wrong.
2. Confirm Insurance (Two Types)
Ask for certificates of:
- ✓General liability ($1M+ minimum) — protects your property
- ✓Workers' compensation — protects YOU if a worker is injured on your property
Without workers' comp, an injured worker can come after the homeowner. This happens more than you'd think.
3. Check Real Reviews (Beyond the Website)
- ✓Google reviews (look for 20+ reviews, read the 1-stars — how did they respond?)
- ✓Yelp, BBB
- ✓Ask for 3 local references — and actually call them
- ✓Drive by a recent job if offered
Red flag: all 5-star reviews posted within the same month. Real companies accumulate reviews over years.
4. Get 3 Written Quotes (And Compare Apples to Apples)
Every quote should itemize:
- ✓Material brand and type (not just "shingles" — *which* shingles?)
- ✓Underlayment type
- ✓Flashing scope (new or reused?)
- ✓Tear-off layers included
- ✓Decking replacement allowance (cost per sheet if rot found)
- ✓Permit handling
- ✓Warranty terms (material AND workmanship, in writing)
- ✓Cleanup and disposal
A quote that's 40% cheaper usually means thinner materials, reused flashing, or no permit. (Our guide on how many quotes to get goes deeper.)
5. Ask About Workmanship Warranty
Manufacturer warranties cover materials (25–50 years). Workmanship warranty covers installation errors — the actual #1 cause of early roof failure. Look for:
- ✓Minimum 5 years workmanship warranty (10 is better)
- ✓In writing, not verbal
- ✓From a company old enough to honor it (a 10-year warranty from a 1-year-old company is worthless)
6. Local Presence Matters
Costa Mesa has specific considerations: coastal salt air, Title 24 cool-roof rules, local permit processes. A roofer who works here daily knows:
- ✓Which materials hold up in marine environments
- ✓Huntington Beach/Costa Mesa permit inspectors and their expectations
- ✓Local HOA requirements (Mesa Verde, South Coast Metro have strict rules)
Storm chasers who blow in after weather events know none of this — and they're gone when problems surface. (How to spot them.)
7. Trust Your Gut at the Inspection
The estimate visit tells you everything:
- ✓Did they actually get on the roof, or quote from the driveway?
- ✓Did they check the attic?
- ✓Did they explain options, or push one product?
- ✓Pressure tactics ("sign today for 20% off")? Walk away.
A good roofer educates. A bad one sells.
Costa Mesa Roofing: Local Notes
- ✓Permit: Required for re-roofing. Your contractor should handle it.
- ✓Title 24: Cool-roof requirements apply — your roofer should know compliant options.
- ✓HOAs: Many Costa Mesa neighborhoods require architectural approval before roofing. Factor in 2–4 weeks.
- ✓Commercial: If it's a commercial building, you need a roofer with commercial experience — different systems, different skills. (See our commercial roofing services.)