How to Choose a Roofing Contractor Bay Area — Red Flags & Checklist 2025

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Quick Answer: When choosing a roofing contractor in the Bay Area, verify these five things: (1) Active CSLB license (check cslb.ca.gov — Class C-39 Roofing license required in California); (2) General liability insurance of at least $1 million AND workers’ compensation insurance — request certificates directly from the insurer; (3) Local Bay Area references with completed projects you can call; (4) Written contract with scope of work, materials (brand, weight, color, warranty), start/end dates, and payment schedule; and (5) Manufacturer warranty registration — top manufacturers like GAF (Master Elite contractor), Owens Corning (Preferred Contractor), or CertainTeed (ShingleMaster) offer extended warranties when installed by their certified contractors.

Roofing Contractor Red Flags — Bay Area Edition

Helpful Resources:

No physical address or PO Box only — storm chasers often operate from temporary addresses
Requests large upfront deposit (>30%) — legitimate Bay Area roofers take 10–25% deposit maximum
Door-to-door after a storm — predatory contractors follow Bay Area atmospheric rivers and wind events
Can’t provide CSLB number immediately — look up at cslb.ca.gov before signing anything
Lowest bid by 30%+ below others — usually means unlicensed labor, inferior materials, or missing insurance
Pressures for same-day decision — legitimate roofers give you time to review written contracts
Offers to “work for your deductible” — this is insurance fraud in California
No written warranty on workmanship — minimum 5-year labor warranty is standard for Bay Area roofing

Question: How many roofing bids should I get in the Bay Area? Get 3–4 bids for any Bay Area roof replacement over $10,000. Do not automatically choose the lowest bid — scope differences between bids are common and the lowest bid often excludes critical items (like ice and water shield in valleys, deck repair allowance, or debris disposal). Compare bids by: exact shingle brand/grade, underlayment type, starter strips, ridge cap, and ventilation plan. Bay Area roofers must comply with California Roofing Industry standards and CRC (California Residential Code) Section R905 — make sure bids include all required elements. Quartz Construction provides detailed, itemized roofing bids so you can compare apples to apples. CSLB #1003436.

Watch: San Jose Remodeling Projects by Quartz Construction

Watch: Bay Area Remodeling Insights

Expert tips and real project walkthroughs to help you plan your Bay Area home improvement.

What Our Bay Area Clients Say

4.9 ★ average rating across Google, Yelp, and Houzz from 150+ Bay Area homeowners.

★★★★★

"Quartz Construction did an amazing job on our kitchen remodel. The team was professional, on time, and the results exceeded our expectations. Highly recommend to any Bay Area homeowner!"

— Michael T. | November 15, 2025

★★★★★

"We hired them for a bathroom remodel in our San Jose home. From permitting to final walkthrough, everything was handled perfectly. The tile work is stunning. 5 stars without hesitation."

— Sarah L. | October 28, 2025

★★★★★

"Just finished our ADU garage conversion. The project came in on budget and on schedule — rare in the Bay Area! The rental income already started. Could not be happier with Quartz Construction."

— David R. | December 2, 2025

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Licensed Bay Area contractor — CSLB #1003436 — serving San Jose, Fremont, Oakland, Santa Clara, Sunnyvale and all Bay Area communities.

Call: (650) 749-7436

📚 Additional Resources: National Roofing Contractors Association (NRCA) • California Contractors State License Board

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Licensed General Contractor • CSLB Lic#1003436 • Serving San Jose, Santa Clara & Bay Area

Recent Projects — Quartz Construction & Remodeling

Home remodeling San Jose CA project results by Quartz Construction in Hayward

Home remodeling San Jose CA project results by Quartz Construction in Fremont

Local home remodeling company San Jose CA serving Hayward - Quartz Construction

Local home remodeling company San Jose CA serving Fremont - Quartz Construction

Google Reviews — What Our Clients Say

      
   Quartz Construction
   65 Google reviews 
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       Posted on Google  
   
   Perry Finch 
 
 
 
 Trustindex verifies that the original source of the review is Google. We’re so happy with the work Hila and her team did on our home addition. The new space flows beautifully with the existing structure, and the quality is clear in every finish. Finished on schedule and stress-free.
  
 
      Posted on Google  
   
   Joy Ruther 
 
 
 
 Trustindex verifies that the original source of the review is Google. Working with Ohad on our full home remodel was an incredible experience. He helped us through every decision and made sure everything turned out exactly how we envisioned. The team was easy to communicate with and super detail-focused. We still can’t believe how beautiful our home looks!
  
 
      Posted on Google  
   
   Ajay Mukhopadhyay 
 
 
 
 Trustindex verifies that the original source of the review is Google. We recently worked with Quartz Construction (Owner: Ohad) for a construction project to remodel our Bathroom and we couldn’t be more pleased with the results. From start to finish, their team demonstrated professionalism, and exceptional craftsmanship. They maintained clear communication throughout the project, kept us informed of progress and any potential changes, and delivered everything on time and within budget. Their quality of work is outstanding — every detail was handled with care and precision. What stood out most was their commitment to customer satisfaction. They were responsive to our questions, respectful of our space, and ensured that the final outcome matched our vision perfectly. If you're looking for a reliable, skilled, and trustworthy construction contractor, I wholeheartedly recommend Quartz Construction ( Ohad and his team) .They exceeded our expectations in every way. Ajay
  
 
      Posted on Google  
   
   debbie curley 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had a fantastic experience working with Quartz Construction And Remodeling. Ohad Maloul the owner was professional communicative and a pleasure to work with from start to finish. His team repaired and painted my backyard pergola and the quality of their work was truly excellent. They were always on time, friendly and responsive to any questions I had throughout the process. I appreciated the clear communication and attention to detail. I’m excited to work with Ohad and his team on future projects and highly recommend them to anyone looking for reliable, high-quality construction or remodeling services.
  
 
      Posted on Google  
   
   Harry Lewis 
 
 
 
 Trustindex verifies that the original source of the review is Google. Hila managed our balcony addition project with care and precision. The design complements our home perfectly, and the build quality is outstanding. She communicated every step and made the whole process easy. We’re thrilled with the result!
  
 
      Posted on Google  
   
   Qi Lei 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had the chance to work with Ohad and his construction team on a recent home project, and I was really impressed. Ohad is professional, easy to communicate with, and genuinely cares about the quality of the work. The crew showed up on time, kept the work area clean, and finished the job on schedule. It’s hard to find contractors who are reliable and transparent these days, but Ohad delivered on everything he promised. Would definitely recommend if you’re looking for someone who takes pride in their work and keeps things straightforward.
  
 
      Posted on Google  
   
   Boris Tyron 
 
 
 
 Trustindex verifies that the original source of the review is Google. We’re so happy with the work Quartz Construction did on our backyard. Ohad’s team designed and built a gorgeous deck and patio that turned the area into a dream space. The quality and detail are fantastic. Highly recommend!
  
 
      Posted on Google  
   
   Gloria Collin 
 
 
 
 Trustindex verifies that the original source of the review is Google. Quartz Construction built the most beautiful pergola in our backyard, thanks to Ohad. He was easy to work with, listened to our needs, and delivered a structure that’s both stylish and durable. We now have a shaded space where we can relax and entertain guests.
  
 
      Posted on Google  
   
   Dustin Walsh 
 
 
 
 Trustindex verifies that the original source of the review is Google. They built a beautiful, durable pergola that fits our outdoor space perfectly. Hila paid close attention to both style and quality. We now have the perfect spot for lounging, gatherings, and enjoying every season.
  
 
      Posted on Google  
   
   Paul Wilins 
 
 
 
 Trustindex verifies that the original source of the review is Google. We feel incredibly lucky to have worked with Hila. She made the ADU process simple and stress-free, handling everything with care and professionalism. The final space is perfect—efficient, elegant, and exactly what we hoped for. Big thanks to her and the whole crew!
  
 
  
  
 
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