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Bay Valley Roofing & Solar vs Mortensen Roofing & Gutters
Contra Costa Roofing Contractors Comparison · Updated March 2026
Mortensen brings 36 years of veteran experience versus Bay Valley's 13, but Bay Valley demonstrates broader project complexity including solar integration and remote coordination capabilities.
| Bay Valley Roofing & Solar | Mortensen Roofing & Gutters | |
|---|---|---|
| Rating | ★ 4.8 | ★ 5.0 |
| Years Licensed | 13 years | 36 years |
| License # | 982745 | 583533 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Concord, CA | Concord, CA |
| Website | bayvalleyroofing.com | www.mortensenroofing.com |
Key Differences
What Customers Say
Bay Valley Roofing & Solar
Customers consistently praise Bay Valley's thorough inspection processes with photo documentation, structured communication including remote coordination options, and professional crews who maintain clean worksites and follow through on post-project questions.
Mortensen Roofing & Gutters
Customers emphasize Mortensen's straightforward professionalism, reasonable competitive pricing, and long-term workmanship quality with references to roofs holding up for decades under the original installation.
Key Takeaway: Bay Valley is chosen for process transparency and complex project coordination capabilities, while Mortensen is valued for veteran reliability, proven longevity, and no-frills execution at competitive rates.
Customer Reviews
Bay Valley Roofing & Solar
Putting on a new roof is a daunting project, but Bay Valley made everything a breeze for us! The process started with a thorough inspection, and then a very comprehensive video chat with Nathan, who e...
We're so glad we chose Bay Valley Roofing and Solar company to replace our roof. Working with Ryan was top notch customer service. Something we don't see as much anymore. He's professional, detailed, ...
Bay Valley Roofing did a great job in replacing our roof. Although we were out of the area, they did an outstanding job of documenting their work and communicating with us in planning and executing t...
Mortensen Roofing & Gutters
Mortensen Roofing roofed our house 35 years ago and it still stand strong. That is until a branch came and chipped a cement tile - they were great and helping me procure a new one a tiny bit different...
Very reasonably priced. Quality workmanship. Timely and consistent with deign.
From the estimate forward, I found working with the owner, John Mortensen, to be easy and professional. His bid was clearly the best I received. His crew, especially the supervisor, Humberto were skil...
Consider Bay Valley Roofing & Solar if...
- ✓ You need solar-related roofing work, whether installing solar shingles, coordinating panel removal and reinstall during a roof replacement, or addressing integration issues between roofing and solar systems
- ✓ Your project involves potential hidden damage from storms or water intrusion where detailed inspection with photo documentation will help you understand the full scope before committing
- ✓ You're managing the project remotely or want structured communication including video calls and regular updates throughout the installation process
- ✓ You value systems and process transparency over lowest-bid pricing and want a contractor who documents conditions thoroughly
Consider Mortensen Roofing & Gutters if...
- ✓ You have a cement tile roof that needs repair or replacement and want a contractor with decades of hands-on experience with this specific material
- ✓ Your priority is proven long-term workmanship, and 36 years of licensure plus customer references to roofs lasting decades gives you confidence in durability
- ✓ You prefer a straightforward, no-frills approach with high owner involvement rather than elaborate documentation systems
- ✓ You want competitive pricing from a veteran contractor whose reviews consistently mention reasonable bids compared to other options
Questions to Ask Before Hiring
- → Ask Mortensen about experience with solar-integrated roofing if your project involves panels, and ask Bay Valley for references on cement tile work if that's your roof type, since each shows clear strength in different areas
- → Ask both contractors how they handle situations where roof deck damage is discovered during tear-off, and whether pricing adjustments require new approval or follow a predetermined structure
- → Ask Bay Valley whether their bid is typically in the middle or upper range compared to competitors, and ask Mortensen about their current crew stability and how long team members have worked together
The Bottom Line
For traditional roofing projects like cement tile repair or standard replacements where proven longevity and competitive pricing matter most, Mortensen's 36 years of veteran experience and track record of roofs lasting decades makes them the stronger choice. However, if your project involves solar integration, requires detailed storm damage assessment, or you need robust remote communication and documentation systems, Bay Valley's specialized capabilities outweigh Mortensen's experience advantage. Both are properly credentialed and well-reviewed, so your decision should hinge on project complexity: choose Mortensen for straightforward traditional roofing, Bay Valley for anything involving solar or requiring detailed project transparency.
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Frequently Asked Questions
For straightforward asphalt shingle replacement on a simple roof, both contractors have sufficient experience. The gap becomes meaningful if complications arise: Mortensen's 36 years means they've likely seen your specific issue before, whether it's unusual flashing requirements, deck rot patterns, or permit complications. For truly standard work, Bay Valley's 13 years is still well into the established tier.
Bay Valley clearly demonstrates solar integration experience with customer reviews mentioning solar shingle installation and panel coordination. Mortensen's reviews focus exclusively on traditional roofing with no mention of solar work. If your project involves solar, Bay Valley's documented experience in this area is a significant advantage worth the potential pricing difference.
Mortensen's reviews specifically mention reasonable pricing and competitive bids, while Bay Valley's reviews note they may not be the lowest bid. This suggests Mortensen likely comes in lower for comparable traditional roofing work. However, if Bay Valley's detailed inspection reveals hidden damage that Mortensen's quicker estimate missed, the initial lower bid may not reflect the true final cost.
Bay Valley's reviews emphasize structured communication systems including photo documentation, remote video calls, and regular updates throughout installation. Mortensen's reviews describe high owner involvement and straightforward coordination but without the same mention of systematic documentation. If you need detailed tracking and remote oversight, Bay Valley's approach is more developed; if you prefer direct owner contact, Mortensen delivers that consistently.
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How We Compare Contractors
License Verification
All license data is sourced from official California CSLB records and verified regularly.
Review Analysis
Customer reviews are aggregated from Google and analyzed to identify patterns in service quality.
Detailed Comparison
We analyze credentials, insurance, experience, and feedback to highlight meaningful differences.
Not all licensed contractors are created equal. While a valid license is the baseline requirement in California, contractors can vary significantly in experience, insurance coverage, and customer satisfaction.
- Experience matters: A contractor with 15+ years of experience has likely encountered and solved problems that newer contractors haven't faced yet.
- Workers' compensation protects you: If a contractor without workers' comp insurance has an employee injured on your property, you could be held liable.
- Reviews reveal patterns: Individual reviews can be misleading, but patterns across many reviews often reveal a contractor's true strengths and weaknesses.
- Bond amounts vary: A contractor's bond provides financial protection if they fail to complete work as agreed. Higher bonds offer more protection.
Taking time to compare contractors on these factors can save you from costly mistakes and help ensure your project is completed by a qualified professional.
Data Sources: License information from California CSLB. Ratings and reviews from Google. Last verified March 13, 2026.
This comparison is based on publicly available information. We recommend getting multiple quotes and verifying all credentials directly before hiring.
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