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Paragon Roofing vs Hassler Heating And Air Conditioning
Contra Costa General Contractors Comparison · Updated March 2026
These companies serve completely different needs: Paragon Roofing handles roofing projects while Hassler specializes in HVAC systems.
| Paragon Roofing | Hassler Heating And Air Conditioning | |
|---|---|---|
| Rating | ★ 4.9 | ★ 4.9 |
| Years Licensed | 3 years | 26 years |
| License # | 1100626 | 770180 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Concord, CA | El Cerrito, CA |
| Website | www.paragonroofco.com | www.hasslerheating.com |
Key Differences
What Customers Say
Paragon Roofing
Customers consistently highlight Paragon's organizational strengths including clear timelines, responsive communication throughout projects, on-time crew arrival, and thorough jobsite cleanup after roofing work.
Hassler Heating And Air Conditioning
Hassler receives repeated praise for thorough HVAC diagnostics with detailed technical explanations, often supported by photo documentation, along with responsive scheduling for both routine and emergency heating situations.
Key Takeaway: Paragon's feedback centers on project management and scheduling reliability for roofing installations, while Hassler's reviews emphasize diagnostic depth and technical communication for complex HVAC troubleshooting.
Customer Reviews
Paragon Roofing
Had them replace my whole roof and gutter system and it was amazing. Fair pricing and followed through everything that was agreed. Thank you Paragon!
Paragon Roofing completed a complicated roof installation in San Francisco for me where 5 layers of old roof needed to be removed before installation of the new roof. It took about 5 business days. ...
Very professional. Set a date and time. They arrived on time and the boss gave me the time that they would be done. The job went well and they were done the same day and on time. I would recommend thi...
Hassler Heating And Air Conditioning
We had Hassler Heating & Air replace the ductwork under our house, and the experience was excellent from start to finish. The team was professional, punctual, and clearly knew what they were doing. Th...
Friendly, intelligent service. Thoroughly checked my heating system and showed in great detail what the problems are. The technician provided detailed inspection and we both agreed that it will be nec...
The crew was professional and courteous while being in my home which was very appreciated. Larry in particular was kind enough to answer my many questions to ensure I understood my new system so that ...
Consider Paragon Roofing if...
- ✓ You need roofing work such as full roof replacement, reroofing, or gutter replacement, as this is Paragon's specialized trade
- ✓ Your project priorities center on clear scheduling and organized communication, areas where Paragon receives consistent positive feedback
- ✓ You're comfortable working with a growing contractor who has 3 years of licensing and a developing track record
- ✓ You value jobsite cleanliness and professional project coordination, which customers frequently mention in Paragon's reviews
Consider Hassler Heating And Air Conditioning if...
- ✓ You need HVAC services including furnace replacement, heat pump installation, air conditioning work, or ductwork projects
- ✓ You're dealing with a complex heating or cooling issue that benefits from deep diagnostic experience accumulated over 26 years
- ✓ You want detailed technical explanations with photo documentation of system conditions and recommendations
- ✓ You have an older home where HVAC complications are more likely and veteran expertise provides meaningful risk reduction
Questions to Ask Before Hiring
- → For Paragon: Ask for references from roof projects completed in the past year and how they handle unexpected issues like hidden dry rot or structural damage discovered during tearoff
- → For Paragon: Confirm how long their current roofing crew has worked together and what warranty coverage they provide on both materials and labor
- → For Hassler: Ask about their experience with your specific system type and age, particularly if you have an older or uncommon HVAC setup
The Bottom Line
This comparison only applies if you're evaluating contractors for different projects. For roofing work, Paragon is your only option between these two, and their 3-year track record shows organized execution despite being a newer contractor. For HVAC work, Hassler is your only choice, bringing substantial veteran expertise that matters more for complex heating and cooling diagnostics. If you're planning both roofing and HVAC projects, hire each for their specialization—just don't expect Paragon to touch your furnace or Hassler to climb on your roof. Focus your decision on which trade you actually need this week.
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Frequently Asked Questions
Yes, but only if your renovation includes both roofing and HVAC components. Paragon would handle roof replacement, gutters, and related exterior work, while Hassler would manage heating, cooling, ductwork, and ventilation systems. You'd need to coordinate their schedules separately since they operate in completely different trades.
It matters significantly for complex or problem-prone projects. Hassler's 26 years means they've diagnosed thousands of HVAC failures and navigated decades of code changes, while Paragon's 3 years means they're still building experience with roofing complications. For straightforward work, the gap matters less; for older homes or complex issues, veteran experience provides measurable risk reduction.
Hassler handles HVAC emergencies like heating failures, with reviews mentioning responsive scheduling for urgent situations. Paragon handles roofing projects that are typically planned in advance rather than emergency repairs. If you have an active roof leak, you'd need to ask Paragon specifically about their emergency repair availability.
Both maintain active licenses, carry workers compensation, and hold proper bonds, covering the major risk factors. Paragon's only consideration is being relatively new at 3 years licensed, which means a shorter track record but doesn't constitute a red flag given their positive customer feedback. Neither company shows concerning gaps in protection or credentials.
Looking for the Best?
See our ranked list of top general contractors in Contra Costa.
Other Contra Costa General Contractors Comparisons
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Bay Valley Roofing & Solar
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High Definition Solar
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Hassler Heating And Air Conditioning
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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 12, 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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