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Sterling Roofing Co vs A+ Quality Roofing
Sonoma Roofing Contractors Comparison · Updated March 2026
Two veteran Glen Ellen roofers with nearly identical credentials, separated by just two years of experience and minimal operational differences.
| Sterling Roofing Co | A+ Quality Roofing | |
|---|---|---|
| Rating | ★ 4.0 | ★ 4.0 |
| Years Licensed | 21 years | 19 years |
| License # | 846392 | 898356 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Glen Ellen, CA | Glen Ellen, CA |
| Website | sterlingroofingco.com | www.aplusqualityroofing.com |
Key Differences
Customer Reviews
Sterling Roofing Co
Found some leaking into the house . Callled another place , had to leave a message .Everybody was busy as a lot of rain was happening . Decided I couldn't sit and wait . Tried Sterling .He answered . ...
A+ Quality Roofing
Aloha Great Job 🤙🇺🇸🤙
A1 roofing Darren Richards Excellent
Consider Sterling Roofing Co if...
- ✓ Your project involves leak detection and repair, where Sterling's documented track record in this specific work type provides relevant experience
- ✓ You value direct owner involvement and prefer working with the business owner rather than crew foremen throughout your project
- ✓ The additional two years of licensing matters to you, particularly if your roof has older systems or potential hidden damage requiring seasoned diagnostic skills
Consider A+ Quality Roofing if...
- ✓ Your property is commercial or you prefer a contractor accustomed to handling both residential and commercial work, suggesting more diverse problem-solving experience
- ✓ You want a contractor with broader operational scope that may have larger crew capacity for faster project completion
- ✓ You're comfortable evaluating contractors based on their estimate presentation and references rather than relying heavily on online review patterns
Questions to Ask Before Hiring
- → Ask both contractors for references from projects completed in the past 12 months, specifically requesting contact information for jobs similar to yours in scope and complexity
- → Request details on who will be on-site managing your project daily and how long that crew has worked together
- → Ask how they typically handle unexpected discoveries during roof work, including their process for communicating additional costs and timeline changes
- → Inquire about their current project load and realistic timeline for starting and completing your specific job
The Bottom Line
You're choosing between two legitimately experienced, properly insured veteran contractors with no significant red flags. Sterling Roofing's slight edge in experience and documented leak repair work makes them marginally preferable if your project involves diagnostic complexity or you value high owner involvement. A+ Quality's residential and commercial scope suggests strong operational capacity that may benefit larger or time-sensitive projects. In practice, get estimates from both, check their references carefully, and choose based on who demonstrates better understanding of your specific roof and communicates more clearly. Neither choice carries meaningful additional risk, so trust your gut on who you'd rather have on your property for several days.
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Frequently Asked Questions
For straightforward replacements or repairs, the difference between 19 and 21 years is minimal. Both have seen multiple generations of roofing materials and techniques. The experience gap becomes more relevant if your roof has unusual complications, older construction methods, or potential structural issues where pattern recognition from hundreds of additional projects could help with diagnosis.
Sterling's documented high owner involvement suggests the business owner is directly engaged in projects, which can mean more consistent quality control and decision-making authority on-site. A+ Quality's unclear owner involvement doesn't indicate a problem, it just means you should ask during estimates who will manage your project and what their role will be. Some homeowners prefer owner involvement while others are fine with experienced crew leaders.
A+ Quality's commercial experience can be an advantage, as commercial work often requires stricter adherence to codes and coordination with inspectors. However, it doesn't make them inherently better for residential work. Sterling's apparent residential focus means they're likely more attuned to homeowner communication preferences and residential-specific concerns like landscape protection and noise management.
Request recent references directly and actually call them. Ask specific questions about communication, cleanup, how they handled surprises, and whether the project finished on budget. Also evaluate how each contractor conducts their estimate: do they thoroughly inspect your roof, explain options clearly, and provide detailed written proposals? Their professionalism during the bidding process often reflects how they'll perform during the actual work.
Looking for the Best?
See our ranked list of top roofing contractors in Sonoma.
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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 10, 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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