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3rdGen Heating & Cooling vs Z And Z Plumbing
Alameda Plumbing Contractors Comparison · Updated March 2026
You're comparing an HVAC contractor with a plumbing contractor, so your choice depends entirely on whether you need heating and cooling work or plumbing work.
| 3rdGen Heating & Cooling | Z And Z Plumbing | |
|---|---|---|
| Rating | ★ 5.0 | ★ 4.6 |
| Years Licensed | 4 years | 19 years |
| License # | 1086898 | 896116 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Berkeley, CA | San Leandro, CA |
| Website | 3rdgen.io | www.zandzplumbing.com |
Key Differences
What Customers Say
3rdGen Heating & Cooling
Customers consistently highlight the owner's direct involvement, educational communication style, and meticulous installation work with exceptional worksite cleanliness.
Z And Z Plumbing
Customers emphasize rapid emergency response times, fair pricing, and professional technicians who provide clear explanations with multiple solution options.
Key Takeaway: 3rdGen operates as a personalized, owner-driven service focused on installation quality, while Z And Z functions as an established emergency-responsive operation prioritizing speed and multiple-technician availability.
Customer Reviews
3rdGen Heating & Cooling
Love 3rd Gen, Devin and the team! They are knowledgeable, professional, kind, and generous. Highly recommend working with them!
I am so glad that I found 3rd Gen Heating & Cooling. The team is smaller so it felt so much more intentional and trustworthy. They pay such great attention to detail, in which they were able to meet m...
I got my HVAC system installed by 3rd gen in 2022, this week the heater stopped working . I gave them a call and Devin and Ceaser visited today to fix the issue. They were at the house right at the ap...
Z And Z Plumbing
Very impressed Short notice call no voicemail picked up right away and arrived within 30 minutes Inspected, diagnosed, recommended multiple solutions instead of one take it or leave it approach Sew...
Recently had Z & Z come out to my house and help me get in compliance for my private sewer lateral certificate. Sergio and his crew were extremely professional every step of the way from explaining th...
Thank to Pablo and thank you to Z and Z Plumbing for helping me with my kitchen sink! They responded quickly and sent a very nice technician who explained everything clearly. He recommended doing main...
Consider 3rdGen Heating & Cooling if...
- ✓ You need HVAC work specifically: furnace replacement, air conditioning installation or repair, or modern heat pump and mini-split systems that require specialized knowledge
- ✓ You're installing newer heat pump technology where 3rdGen's focused expertise with Mitsubishi systems and current equipment matters more than decades of general experience
- ✓ You value direct owner involvement throughout your project, from initial assessment through installation and follow-up communication
- ✓ You want meticulous installation work with particular attention to worksite cleanliness, which multiple customers specifically noted in their feedback
Consider Z And Z Plumbing if...
- ✓ You need plumbing work: drain clearing, sewer lateral repair or replacement, sink and fixture issues, or compliance certificates for property transfers
- ✓ You're dealing with a plumbing emergency where Z And Z's documented same-day and rapid response times become critical
- ✓ Your project involves older home plumbing where 19 years of diagnosing hidden issues, outdated materials, and code compliance matters significantly
- ✓ You prefer working with an established service operation that staffs multiple technicians rather than a smaller owner-operated team
Questions to Ask Before Hiring
- → If you need both HVAC and plumbing work done, ask each company whether they coordinate with other trades or if you'll need to manage the scheduling between contractors yourself
- → For 3rdGen, ask about their experience with your specific HVAC equipment brand and whether the owner will be directly involved in your project
- → For Z And Z, ask which technician would handle your project and how long they've been with the company, since owner involvement is less clear
The Bottom Line
Your decision is straightforward: hire 3rdGen if you need HVAC work and Z And Z if you need plumbing work. If you're managing a property and evaluating contractors across trades, understand that 3rdGen offers personalized, owner-driven service with modern heat pump expertise but only four years of operational history, while Z And Z brings 19 years of plumbing experience with faster emergency response but less personal involvement. Both maintain proper insurance and bonding. The experience gap favors Z And Z for complex plumbing diagnostics in older homes, while 3rdGen's focused expertise suits modern HVAC installations where newer technology matters more than decades of experience.
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Frequently Asked Questions
It matters significantly within each trade. Z And Z's 19 years means extensive experience with older plumbing systems, cast iron pipes, and code changes that affect Bay Area homes. 3rdGen's four years is less relevant for basic HVAC repairs but perfectly adequate for modern heat pump installations where the technology itself is relatively new. Experience depth matters most when diagnosing complex problems or working with older home infrastructure.
No, these are separate licensed trades requiring different expertise and licensing. 3rdGen holds an HVAC contractor license and cannot legally perform plumbing work. Z And Z holds a plumbing license and cannot perform HVAC work. You'll need to hire both if you need work in both areas.
For plumbing emergencies, Z And Z shows a clear pattern of same-day response with some customers reporting 30-minute arrival times. For HVAC emergencies, 3rdGen offers same-day and next-day availability but the nature of HVAC emergencies differs from plumbing. A burst pipe requires immediate response; a broken furnace needs quick service but rarely demands arrival within the hour.
This reflects different business models rather than quality differences. 3rdGen's high owner involvement means direct communication and consistent oversight, which many customers value for installation projects. Z And Z operates as an established service company where you'll likely work with employed technicians, which is standard for veteran plumbing companies and works well for routine service and emergency calls.
Looking for the Best?
See our ranked list of top plumbing contractors in Alameda.
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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 08, 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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