Residential RoofersCheck a roofer's license before you sign anything

Top-rated roofing contractors near Alamo, CA

No license record for Alamo's roofers sits in this tool yet, so we searched Google Maps instead. The 8 names below average 4.8 stars on 350 combined reviews. Write the number down anyway. A rating tells you nothing about whether it's current.

Google Maps ratings checked · How we rank

Alamo, CA roofing contractors, Google's top-rated picks

We sort this list by Google rating, pulled down a notch when the review count behind it is thin; it's a sort, not the license check this tool otherwise runs, so look that number up separately.

  1. Tri Valley RoofingRoofing contractor · 5.0 out of 5 on Google · 43 Google reviews · San Ramon 94583Google reviews
  2. Symplify RoofingRoofing contractor · 4.9 out of 5 on Google · 64 Google reviews · Walnut Creek 94598Google reviews
  3. Acker RoofingRoofing contractor · 4.8 out of 5 on Google · 146 Google reviews · Concord 94518Google reviews
  4. Blue Peak RoofingRoofing contractor · 4.9 out of 5 on Google · 34 Google reviews · Danville 94526Google reviews
  5. Ascend Renovation & RoofingRoofing contractor · 5.0 out of 5 on Google · 17 Google reviews · Walnut Creek 94596Google reviews
  6. Clark Family Walnut Creek Roof RepairRoofing contractor · 4.8 out of 5 on Google · 36 Google reviews · Walnut Creek 94596Google reviews
  7. Spotlight Roofing IncRoofing contractor · 5.0 out of 5 on Google · 7 Google reviews · Not listedGoogle reviews
  8. Don Nelson RoofingRoofing contractor · 3.7 out of 5 on Google · 3 Google reviews · Danville 94526Google reviews

How to check a license in California

  1. Search using the license number, the business name, or the name of whoever qualifies the license.[1]
  2. Confirm the classification reads C-39, the roofing classification, rather than relying on a general "B" license for a single-trade roof job.[2]
  3. Check that workers' compensation is shown on file; C-39 roofers must carry it whether or not they have employees.[2]
  4. Review the license's status and any disciplinary history displayed on the same result page.[1]

CSLB Check a Contractor License

Warning signs

  • A license status that reads inactive, revoked, or suspended, or a business name that doesn't match your bid.[1]
  • No pocket license or photo ID offered when someone arrives to give you a bid in person.[3]
  • A deposit bigger than the state's own cap, the smaller of a tenth of the job's price or $1,000, without a bond on record to explain the extra.[4]
  • Pressure to waive or rush past your three-day right to cancel after signing.[4]

Rules that protect you

  • California requires a $25,000 bond for a C-39 license, on top of mandatory workers' compensation coverage for every C-39 roofer.[2]
  • Any roofing job with combined labor and materials of $500 or more requires a C-39-licensed contractor by law.[2]
  • A written contract is required for home improvement work over $500, with a right to cancel within three days of signing.[4]

Before you let anyone on your {city} roof

  1. Does the name on the bid match the name on the license exactly?
  2. Is the license active, and when does it expire?
  3. Does the company have a local address, or only a cell phone number and an out-of-state plate?
  4. Did they contact you first, unprompted, right after a storm?
  5. Are they asking for full payment, cash only, or a deposit before any paperwork is signed?
  6. Will they give you a written, itemized estimate before you commit to anything?

More on California →

What the federal hazard data says about Alamo

FEMA's county-level hazard data rates hail risk near Alamo as Very Low.

Hail is one of the two most common reasons a roofer knocks on a Alamo door uninvited, according to insurance-industry fraud warnings.

Hail
Very Low
Strong wind
Relatively Low
Wildfire
Relatively Moderate

Data: FEMA, National Risk Index for Natural Hazards - County-level table, v1.20 (v1.20, December 2025).

More California license lookups

All cities in California →

Sources

  1. Check a Contractor License or Home Improvement Salesperson (HIS) Registration, Contractors State License Board, accessed 2026-09-30
  2. Roofing Contractor (C-39) Licensing Classification, Contractors State License Board, accessed 2026-09-30
  3. How do I find the right licensed contractor?, Contractors State License Board, accessed 2026-09-30
  4. What Should I Look for in a Contract and Binding Agreements?, Contractors State License Board, accessed 2026-09-30