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Dollens Electric vs Therma
Santa Clara Electrical Contractors Comparison · Updated March 2026
Dollens Electric specializes in residential electrical work, while Therma is a commercial mechanical contractor that doesn't handle typical home electrical projects.
| Dollens Electric | Therma | |
|---|---|---|
| Rating | ★ 4.9 | ★ 4.6 |
| Years Licensed | 20 years | 9 years |
| License # | 867376 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | San Jose, CA |
| Website | dollenselectric.com | www.therma.com |
Key Differences
What Customers Say
Dollens Electric
Customers consistently praise quick response times, detailed technical explanations, and professional service across diverse residential electrical projects.
Therma
Customers highlight high-quality custom fabrication work, manufacturing capabilities, and professional service for commercial and industrial mechanical projects.
Key Takeaway: Dollens receives feedback from residential homeowners about communication and project execution, while Therma's reviews come from commercial clients evaluating manufacturing precision and industrial capabilities.
Customer Reviews
Dollens Electric
Great Company, very happy every time they do work for us.
I needed to upgrade my electrical panel. Dollens Electric did a load calculation and recommended a new panel that would accommodate the electrification of my furnace and water heater down the road. Th...
Fixed my problem and replaced my electronic door lock promptly.
Therma
Did Stanford blood donation here today.
Can't say enough about this company this group of guys the work that they do and the high technology that they are getting involved in. There is a manager Paul there, great guy hard worker. The compan...
Top notch mechanical contractor. Very professional.
Consider Dollens Electric if...
- ✓ You need any residential electrical work, from simple repairs to major installations like panel upgrades or EV chargers
- ✓ You value quick response times and clear communication throughout the project, which customers consistently report
- ✓ Your project requires experience diagnosing hidden issues in older homes, where 20 years of residential expertise matters
- ✓ You want a contractor with established residential customer relationships and repeat business patterns
Consider Therma if...
- ✓ You operate a commercial or industrial facility needing custom HVAC duct fabrication or mechanical contracting
- ✓ Your project requires precision metal fabrication, specialty ducting components, or medical gas system installation
- ✓ You need high-volume manufacturing capabilities for commercial mechanical components
- ✓ You're managing a commercial property in Silicon Valley requiring comprehensive mechanical services
Questions to Ask Before Hiring
- → For Dollens Electric: Ask about their availability for your specific project timeline and whether your electrical work requires permits
- → For Therma: Confirm directly whether they handle residential electrical projects, as their business model appears exclusively commercial and industrial
- → Ask both companies for recent project examples that match your specific scope to ensure proper fit
The Bottom Line
For residential electrical work, choose Dollens Electric—it's the only appropriate option between these two companies. Therma operates exclusively in commercial mechanical contracting and industrial fabrication, not residential electrical services. With 20 years of residential electrical experience, strong customer feedback about responsiveness and communication, and proven expertise in exactly the projects homeowners need, Dollens Electric is equipped to handle your electrical work. Contact Dollens directly to schedule an estimate for your specific project.
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Frequently Asked Questions
No, Therma operates as a commercial mechanical contractor focused on HVAC duct manufacturing and industrial fabrication. Their project history and capabilities center on commercial facilities, not residential electrical work that homeowners typically need.
Dollens Electric's 20 years in residential electrical work means extensive experience diagnosing hidden problems in older homes and handling complications during installations. Therma's 9 years applies to commercial mechanical systems, which involves completely different technical challenges and client relationships than home electrical projects.
Dollens Electric handles residential electrical work exclusively. Therma's ductwork capabilities serve commercial and industrial clients with custom fabrication needs, not typical residential HVAC installations. You would likely need separate contractors for each scope.
Only if you're managing a commercial property or industrial facility requiring custom metal fabrication, specialty mechanical systems, or high-volume HVAC component manufacturing. For residential electrical work in your home, Therma is not positioned to serve that market.
Looking for the Best?
See our ranked list of top electrical contractors in Santa Clara.
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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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