Residential RoofersCheck a roofer's license before you sign anything

10 top-rated roofers near Los Altos: check before you call

Los Altos has 10 top-rated roofers on this page, screened from Google rather than a state file. Reviews behind them range from 19 to 164 per business. Before you sign, run whatever number they give you through your state's lookup, not through this page.

Google Maps ratings checked · How we rank

Los Altos, 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. Top RoofingRoofing contractor · 5.0 out of 5 on Google · 53 Google reviews · Cupertino 95014Google reviews
  2. Shelton Roofing Co IncRoofing contractor · 4.9 out of 5 on Google · 149 Google reviews · Mountain View 94043Google reviews
  3. Mountain Roofing ProRoofing contractor · 4.9 out of 5 on Google · 97 Google reviews · Mountain View 94043Google reviews
  4. Swift Fox Fix RoofingsRoofing contractor · 4.9 out of 5 on Google · 59 Google reviews · Los Altos 94022Google reviews
  5. Lifetime Roofing & Renovation, Inc.Roofing contractor · 4.8 out of 5 on Google · 164 Google reviews · Sunnyvale 94085Google reviews
  6. Mountain View RoofingRoofing contractor · 4.8 out of 5 on Google · 117 Google reviews · Mountain View 94043Google reviews
  7. Best Roof MaintenanceRoofing contractor · 4.8 out of 5 on Google · 71 Google reviews · Mountain View 94043Google reviews
  8. Deluxe Los Altos RoofingRoofing contractor · 4.9 out of 5 on Google · 31 Google reviews · Los Altos 94022Google reviews
  9. Velto Quarn RoofersRoofing contractor · 4.8 out of 5 on Google · 62 Google reviews · Los Altos Hills 94022Google reviews
  10. Superior Edge Roofing & Construction GroupRoofing contractor · 5.0 out of 5 on Google · 19 Google reviews · Los Altos 94022Google 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 Los Altos

FEMA's county-level hazard data rates hail risk near Los Altos as Relatively Low.

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

Hail
Relatively Low
Strong wind
Very 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