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Serrano Electric vs Therma
Santa Clara General Contractors Comparison · Updated March 2026
You're comparing an electrical contractor to a commercial mechanical contractor specializing in HVAC duct manufacturing and industrial fabrication.
| Serrano Electric | Therma | |
|---|---|---|
| Rating | ★ 4.2 | ★ 4.6 |
| Years Licensed | 39 years | 9 years |
| License # | 507852 | 1027316 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Morgan Hill, CA | San Jose, CA |
| Website | serranoelectric.com | www.therma.com |
Key Differences
What Customers Say
Therma
Customers consistently praise Therma's high-quality commercial fabrication work, manufacturing capabilities, and professional approach to custom mechanical projects.
Key Takeaway: Therma has documented customer feedback emphasizing commercial and industrial fabrication quality, while Serrano has limited online review presence despite nearly four decades in business.
Customer Reviews
Serrano Electric
Professional , service oriented company . Some of the best Electricians one could ask for
Servicing for residential and commercial electrical needs
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 Serrano Electric if...
- ✓ You need electrical work for your home or commercial property, including wiring, panel upgrades, lighting, or electrical repairs
- ✓ You value deep experience, as 39 years in business means Serrano has handled virtually every electrical scenario in residential and light commercial settings
- ✓ You prefer working with a locally established Morgan Hill contractor with decades serving the community
Consider Therma if...
- ✓ You're managing a commercial or industrial facility requiring custom HVAC ductwork, specialty fabrication, or mechanical systems
- ✓ Your project involves medical gas systems, process equipment, or precision metal fabrication for commercial applications
- ✓ You need high-volume manufacturing capabilities for custom ducting components or electrical gutters rather than service work
Questions to Ask Before Hiring
- → For Serrano Electric: Ask for references from recent electrical projects similar to yours and inquire about their current workload and timeline
- → For Therma: Confirm they take residential projects if that's your need, as their focus appears primarily commercial and industrial
- → Ask each contractor to describe their typical customer and project type to ensure alignment with your specific needs
The Bottom Line
This comparison only makes sense if you're managing a commercial property needing multiple trades. For residential electrical work, Serrano Electric is the clear choice with 39 years of electrical expertise. For commercial mechanical fabrication, HVAC ductwork, or industrial systems, Therma has the specialized capabilities and documented quality. Don't hire an electrical contractor for mechanical work or vice versa—identify what trade you actually need, then contact the appropriate specialist.
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Frequently Asked Questions
You likely shouldn't be unless you have a commercial facility needing both trades. Serrano handles electrical work while Therma handles mechanical systems and fabrication. If you need electrical service, Serrano is the relevant choice; if you need commercial HVAC ductwork or custom metal fabrication, Therma is appropriate.
Therma's documented expertise centers on commercial mechanical systems, HVAC duct manufacturing, and industrial fabrication. Their customer feedback emphasizes manufacturing capabilities and commercial projects, not residential service. If you have a residential need, confirm they regularly serve homeowners before proceeding.
The limited review presence is worth noting, but 39 years of continuous licensing suggests an established client base. Many veteran contractors rely on repeat customers and referrals rather than online reviews. Ask Serrano directly for recent customer references to verify their current work quality.
It's less about the experience gap and more about trade specialization. Serrano's 39 years is relevant if you need electrical work and indicates they've handled every common electrical issue. Therma's 9 years in commercial mechanical work is substantial for their specialty but doesn't apply to electrical projects.
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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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