TSP Roofing and Solar vs Hassler Heating And Air Conditioning
Contra Costa General Contractors Comparison · Updated March 2026
This comparison requires choosing between two completely different trades: TSP handles roofing and solar work, while Hassler specializes in HVAC systems.
| TSP Roofing and Solar | Hassler Heating And Air Conditioning | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.9 |
| Years Licensed | 3 years | 26 years |
| License # | 1096233 | 770180 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Hercules, CA | El Cerrito, CA |
| Website | www.tsproofingandsolar.com | www.hasslerheating.com |
Key Differences
What Customers Say
TSP Roofing and Solar
TSP customers consistently highlight responsive communication with regular progress updates, quick scheduling, and efficient project completion across coordinated roofing and solar work.
Hassler Heating And Air Conditioning
Hassler customers frequently mention thorough diagnostic processes with photo and video documentation, detailed technical explanations, and systematic approaches to HVAC service and installation.
Key Takeaway: TSP's feedback emphasizes project coordination speed and communication across multiple trades, while Hassler's reviews focus on diagnostic depth and technical expertise from decades of HVAC-specific experience.
Customer Reviews
TSP Roofing and Solar
I can't recommend TSP Roofing & Solar enough. Mario and his team were absolutely incredible. I reached out to over 25 different companies trying to find someone who could handle both roofing and solar...
From beginning to end TSP roofing and solar did a fabulous job. They did a new roof for us along with solar battery bundle. They were efficient and well organized and most importantly they kept in tou...
Mario and crew over-delivered on everything! They recognized we’d need to upgrade our electrical panel and got it approved by PG&E and installed within 30 days, when other installers told us 3—4 m...
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 TSP Roofing and Solar if...
- ✓ You need roofing work, solar installation, or coordination between the two, which is TSP's specific focus and Hassler doesn't offer
- ✓ Your project involves electrical service upgrades tied to solar panel installation, where TSP has demonstrated experience with permitting and utility coordination
- ✓ You value fast project completion and want a contractor known for efficient one-day installations on certain solar-related work
- ✓ You're comfortable working with a newer contractor (3 years licensed) in exchange for responsive communication and organized project management across multiple scopes
Consider Hassler Heating And Air Conditioning if...
- ✓ You need heating, cooling, ductwork, or any HVAC-related work, which is Hassler's exclusive specialization and TSP doesn't provide
- ✓ Your system issue requires diagnostic expertise from someone who has seen 26 years of equipment failures, compatibility problems, and manufacturer changes
- ✓ You want a veteran contractor with over two decades of continuous operation for a major system replacement or complex ductwork project
- ✓ You value thorough inspections with photo and video documentation of system conditions before making repair-versus-replace decisions
Questions to Ask Before Hiring
- → If your project involves both roofing or solar work AND HVAC needs, ask each company directly who they recommend and typically coordinate with for the other trade
- → Ask TSP for references from projects similar in scope to yours, particularly if your roof may have hidden damage that requires experienced assessment beyond their 3 years
- → Ask Hassler about their experience with heat pump installations if you're considering electrification, as this technology has evolved significantly and you want recent project examples
- → Confirm with either company how they handle warranty claims and who performs the work if issues arise months or years after installation
The Bottom Line
You're choosing between two contractors in completely different trades, so the decision is straightforward: hire TSP for any roofing, solar, or related electrical work, and hire Hassler for any heating, cooling, or ventilation needs. Both carry proper insurance and bonds, demonstrate strong communication in reviews, and serve overlapping service areas in Contra Costa County. The 23-year experience gap favors Hassler for complex HVAC diagnostics, but TSP's 3 years is adequate for most roofing and solar projects, particularly given their strong feedback on project coordination. If your home needs work in both categories, you'll likely hire both companies in sequence rather than choosing between them.
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Frequently Asked Questions
You'll need to hire both companies since they serve completely different trades. Coordinate timing carefully—roof work can generate dust and vibration that you don't want affecting new HVAC equipment, and HVAC replacements sometimes require roof penetrations for venting. Ask each contractor if they typically coordinate with the other trade and request they communicate about scheduling and any structural considerations.
It matters primarily for diagnostic complexity and having seen rare failure modes. Hassler's 26 years means they've likely encountered your specific HVAC problem before and know how different manufacturers' systems age. TSP's 3 years is sufficient for standard roofing and solar installations but means less exposure to unusual structural issues or complicated roof configurations. For straightforward projects, the gap matters less than for complex diagnostics.
TSP handles the solar and electrical panel upgrade portions of electrification, which reviews specifically mention. Hassler handles heat pump installations and HVAC system conversions away from gas. For whole-home electrification, you would likely need both contractors working in sequence, plus possibly a separate electrician depending on the scope. Neither appears to be a single-source provider for complete electrification projects.
If you're seeing water stains or leaks, start with TSP for roof assessment. If you're experiencing temperature control issues, strange noises from heating or cooling equipment, or airflow problems, call Hassler. If the issue could genuinely be either (like attic moisture that might be condensation or a leak), consider getting both assessments since diagnostic visits are typically low-cost compared to misdiagnosing the root cause.
Looking for the Best?
See our ranked list of top general contractors in Contra Costa.
Other Contra Costa General Contractors Comparisons
Apollo Roofing Company
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Hassler Heating And Air Conditioning
★ 4.9
Got Watts?
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Hassler Heating And Air Conditioning
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Bay Valley Roofing & Solar
★ 4.8
Hassler Heating And Air Conditioning
★ 4.9
High Definition Solar
★ 4.1
Hassler Heating And Air Conditioning
★ 4.9
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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