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TSP Roofing and Solar vs Hassler Heating And Air Conditioning
Contra Costa Electrical Contractors Comparison · Updated March 2026
These companies serve completely different trades—TSP handles roofing and solar projects while Hassler specializes in HVAC systems with 26 years of experience.
| 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
Customers consistently highlight TSP's responsive communication with regular progress updates and photos, along with efficient crews that complete installations quickly.
Hassler Heating And Air Conditioning
Hassler receives repeated mentions for thorough diagnostic processes with detailed explanations using photo and video documentation, plus systematic inspection approaches.
Key Takeaway: TSP's feedback emphasizes project speed and frequent updates during active installation, while Hassler's reviews focus on diagnostic thoroughness and technical explanations during service calls and system evaluations.
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 panel installation, or coordinated projects combining both, particularly if you want one contractor managing the entire scope including related electrical upgrades
- ✓ You value quick project turnarounds and appreciate frequent communication with progress photos throughout installation
- ✓ Your project is relatively straightforward without complex complications that require decades of troubleshooting experience
- ✓ You're installing solar and need coordination with permitting, utility approvals, and main panel upgrades handled by the same team
Consider Hassler Heating And Air Conditioning if...
- ✓ You need heating or cooling system work—furnace replacement, heat pump installation, ductwork, air conditioning, or water heater services
- ✓ Your HVAC system has ongoing issues requiring thorough diagnostic expertise to identify root causes rather than surface symptoms
- ✓ You value a contractor with 26 years of experience who has seen virtually every configuration and complication in residential HVAC work
- ✓ You're planning home electrification with heat pump conversions and want a veteran contractor who understands load calculations and system integration
Questions to Ask Before Hiring
- → If coordinating both roofing/solar and HVAC work, ask each contractor about timeline dependencies—does the roof need completion before HVAC ductwork modifications, or does electrical panel upgrading need sequencing with solar installation?
- → Ask TSP for references from projects with similar complexity to yours, particularly if your roof is older or you anticipate complications during installation
- → Ask Hassler about their experience with projects involving solar installations, since electrical panel capacity and load calculations may affect HVAC system design
- → Confirm with both companies how they coordinate with other trades if your project requires multiple contractors working in sequence
The Bottom Line
You're not choosing between these contractors—you're coordinating different trades. TSP handles your roofing and solar needs with responsive communication and efficient project management, though their 3 years of licensing means less experience with complex complications. Hassler brings 26 years of HVAC expertise for heating and cooling system work, with thorough diagnostic capabilities for troubleshooting persistent issues. If your project spans both trades, hire both companies and coordinate timelines carefully: roof work typically precedes HVAC modifications, and solar electrical upgrades may impact HVAC capacity planning. Contact whichever contractor matches your immediate need, then bring in the other trade as sequencing requires.
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Frequently Asked Questions
No—these contractors operate in different trades entirely. TSP specializes in roofing and solar work, while Hassler focuses on heating and cooling systems. You'll need to hire both companies if your project includes work from both categories. Coordinate timelines directly, as roof work may need completion before certain HVAC installations, and electrical panel upgrades for solar may affect HVAC capacity planning.
Three years of licensing means TSP has less experience diagnosing hidden complications—such as roof structural issues discovered during solar mounting, or unexpected electrical panel limitations. For straightforward installations on newer roofs with adequate panel capacity, this matters less. For older homes or complex configurations, a contractor with deeper institutional knowledge may better navigate surprises that arise during installation.
Yes, especially if you're considering future electrification like replacing a gas furnace with a heat pump. Solar panel sizing should account for increased electrical loads from HVAC upgrades. Ask TSP about sizing your solar array to accommodate future heat pump installation, and ask Hassler about the electrical load requirements for any HVAC systems you're considering so the solar design can incorporate that capacity.
Start with TSP if your roof needs replacement or repair before other work can proceed—you can't install or modify HVAC systems on a leaking or damaged roof. Once roofing scope and timeline are clear, bring in Hassler for HVAC planning. If your roof is sound and you're only adding solar, coordinate both contractors early since electrical panel work may affect system placement and capacity for both trades.
Looking for the Best?
See our ranked list of top electrical contractors in Contra Costa.
Other Contra Costa Electrical Contractors Comparisons
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Hassler Heating And Air Conditioning
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West Coast Solar
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Hassler Heating And Air Conditioning
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Solar Technologies
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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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