Compare Local Pros
Air Temp vs Granite Electric
San Mateo Electrical Contractors Comparison · Updated March 2026
You're comparing an HVAC specialist with 19 years experience to an electrical contractor with 34 years experience—these serve completely different needs.
| Air Temp | Granite Electric | |
|---|---|---|
| Rating | ★ 4.3 | ★ 4.4 |
| Years Licensed | 19 years | 34 years |
| License # | 889684 | 626673 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | San Mateo, CA | Brisbane, CA |
| Website | airtempco.com | graniteelectricinc.com |
Key Differences
What Customers Say
Air Temp
Air Temp customers emphasize timely service and responsive availability for urgent heating and refrigeration situations.
Granite Electric
Granite Electric customers highlight on-time performance and ease of collaboration across projects ranging from simple repairs to whole-house rewiring.
Key Takeaway: Air Temp's reviews focus on availability for urgent service calls, while Granite Electric's reviews demonstrate capability handling extended renovation projects requiring sustained coordination.
Customer Reviews
Air Temp
Being without heat for over a month (me being lazy and in denial) Luis was great!!!! Gave me a time range when he could stop by and updated me when he could arrive earlier. He "allowed" me to watch...
Luis is always available to come to the rescue! He is reliable and his fees are in line with other Peninsula services.
Refrigeration Repair pros. That's what they are!!! They fixed our commercial refrigerator on time for my business to re-open. Great service...
Granite Electric
I hired Granite Electric to upgrade our electrical panel and install several 240V outlets as part of a project to transition from gas to electric appliances. After obtaining multiple bids, I found Dav...
We used Granite Electric for installing two light fixtures and change out a plug that hasn't worked in years. Spoke to Dave, very pleasant and made appt. Daniel showed up exactly on time, did a beau...
Granite Eletric did a great job upgrading my pannel and adding two wall plugs in my garage for my air compressor.i will be giving them a call back when I start my upgrade to my home
Consider Air Temp if...
- ✓ You need heating system repair or commercial refrigeration service, which is Air Temp's core specialty
- ✓ You value responsive availability for urgent HVAC situations, which customers specifically mention
- ✓ Your project involves diagnosing heating problems or maintaining refrigeration equipment
- ✓ You're located in San Mateo and want a contractor with 19 years of local HVAC experience
Consider Granite Electric if...
- ✓ You need electrical work ranging from outlet repairs to panel upgrades or whole-house rewiring
- ✓ Your project involves EV charger installation or 240V outlet work for appliances
- ✓ You want a contractor with 34 years of experience navigating electrical code changes and complex diagnostics
- ✓ You have a renovation requiring complete electrical system work or multiple electrical projects
Questions to Ask Before Hiring
- → If your issue could be either electrical or HVAC-related (like a furnace not starting), ask each contractor to explain what their diagnostic process would reveal and whether the other trade might need involvement
- → Ask whether either contractor coordinates with the other trade if your project requires both electrical and HVAC work
- → For hybrid projects like heat pump installations, clarify which contractor would handle which components and who coordinates the overall installation
The Bottom Line
These contractors serve fundamentally different needs, so your choice depends entirely on your project type. If you need heating, cooling, or refrigeration work, choose Air Temp with its 19 years of HVAC specialization and emphasis on responsive service. If you need electrical work from simple repairs to complex rewiring or EV charger installation, choose Granite Electric with its 34 years of experience and demonstrated capability across project scales. If your project genuinely requires both trades—like a major renovation or heat pump installation—you'll likely need both contractors, and you should clarify upfront who coordinates the work.
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Frequently Asked Questions
Heat pumps require both electrical infrastructure (dedicated circuits, potentially panel upgrades) and HVAC expertise (refrigerant lines, ductwork, system sizing). Granite Electric could handle the electrical components while Air Temp manages the HVAC side. You'd need to clarify which contractor would serve as the primary coordinator or if you'll manage coordination between both trades yourself.
Furnace failures can stem from either trade: electrical issues include tripped breakers, faulty thermostats, or control board problems, while HVAC issues involve ignition systems, gas valves, or mechanical components. Air Temp would be your primary contact since they specialize in heating systems and can identify if the root cause requires an electrician. Starting with the HVAC specialist typically makes more sense for heating equipment.
For straightforward repairs within each company's specialty—replacing an outlet or fixing a refrigerator compressor—both have sufficient experience. The gap matters more for complex diagnostics, older systems with outdated components, or projects involving code compliance issues where Granite Electric's 34 years provides deeper historical knowledge of building standards and system evolution.
San Mateo and Brisbane are adjacent communities, so neither location creates a meaningful service area advantage. Both companies serve the broader Peninsula region. Your decision should focus entirely on which trade specialty matches your project needs rather than the minimal distance difference between their base locations.
Looking for the Best?
See our ranked list of top electrical contractors in San Mateo.
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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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