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Allstar Plumbing vs Nelson Plumbing
Santa Clara Plumbing Contractors Comparison · Updated March 2026
Both are veteran plumbers with 30+ years experience, but only Allstar carries workers compensation insurance to protect homeowners from liability.
| Allstar Plumbing | Nelson Plumbing | |
|---|---|---|
| Rating | ★ 4.8 | ★ 5.0 |
| Years Licensed | 29 years | 34 years |
| License # | 732611 | 626176 |
| Workers' Comp | ✓ Yes | — |
| Bond Amount | $25,000 | $25,000 |
| Location | San Jose, CA | San Jose, CA |
| Website | goallstar.com | nelsonplumbers.com |
Key Differences
What Customers Say
Allstar Plumbing
Allstar receives consistent praise for arriving within an hour of calls, clear communication before starting work, and handling diverse projects from emergency leaks to water heater installations with professional efficiency.
Nelson Plumbing
Nelson stands out for technical expertise and high owner involvement, with customers specifically noting capability on major projects like whole-house repiping alongside fast emergency response.
Key Takeaway: Allstar's reviews emphasize operational consistency and breadth across many service types, while Nelson's feedback highlights specialized technical knowledge and direct owner engagement on complex projects.
Customer Reviews
Allstar Plumbing
Great job Luis I give a 10
Joe L. Provided a great services and very satisfied with the work he did.
Joe was a great technician that new his job very well. He did a great job in letting us know what was happening with all of the repairs. You have a great company that is very helpful and professional....
Nelson Plumbing
I have so much to say about how great Nelson Plumbing is! In an emergency I was lucky I picked the right company for the job! Fast response on a Saturday! Professional and super knowledgeable! New wat...
I don't know what I'd do without Carrie Nelson (ok and P.J., her husband) We have used Nelson Plumbing from small things like replacing our kitchen sink faucet to repiping our entire 2 story house wit...
Consider Allstar Plumbing if...
- ✓ You want to minimize liability exposure, as Allstar's workers compensation insurance protects you if someone is injured during your plumbing work
- ✓ Your project involves routine repairs or installations like water heaters, drain clearing, fixture replacements, or gas line work where their documented service breadth provides confidence
- ✓ You need same-day emergency service and value the consistent feedback about hour-or-less response times
- ✓ You prefer working with a company showing diverse project experience across residential and commercial applications
Consider Nelson Plumbing if...
- ✓ You're comfortable verifying workers comp coverage directly or confirming your homeowner's policy covers contractor injuries, and you prioritize the five additional years of licensed experience
- ✓ Your project is a major undertaking like whole-house repiping where high owner involvement and deep technical expertise are priorities
- ✓ You value direct owner engagement throughout your project and the personalized attention that typically provides
- ✓ You're willing to accept the insurance coverage gap in exchange for Nelson's specialized technical reputation on complex plumbing challenges
Questions to Ask Before Hiring
- → For Nelson Plumbing: Ask whether workers compensation coverage has been obtained since the last filing, and if not, request written confirmation of your liability exposure and discuss coverage with your homeowner's insurance agent before proceeding
- → For both companies: Ask for references from projects similar to yours in scope and complexity, particularly emergency repairs for Allstar and major repiping work for Nelson
- → For Nelson Plumbing: Given the high owner involvement noted in reviews, confirm whether the owner will personally be on-site for your specific project or if crew members will handle the work
The Bottom Line
For most homeowners, Allstar Plumbing is the safer choice. Both companies bring 30+ years of veteran experience and professional service, but Allstar's workers compensation coverage eliminates a significant liability risk that Nelson exposes you to. Allstar also demonstrates broader documented service range and slightly more consistent emergency response times. Choose Nelson only if you're willing to verify insurance coverage directly or accept the liability exposure, and your project specifically benefits from high owner involvement on complex work like whole-house repiping. For standard repairs, installations, and emergency calls, Allstar provides comparable expertise with better risk protection.
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Frequently Asked Questions
If Nelson sends employees to your home and someone is injured, you could be held liable for their medical expenses and lost wages if your homeowner's insurance doesn't cover it. This is a significant financial risk. Before hiring Nelson, verify whether they've obtained coverage recently or confirm with your insurance agent that you're protected.
Five additional years of licensing (34 vs 29) represents more experience, but both are veteran contractors with three decades in the field. The practical difference in capability is minimal at this experience level. The workers comp gap is a concrete liability issue, while the experience advantage is marginal.
Both companies receive strong feedback for emergency responsiveness, with same-day and weekend availability. Allstar has more consistent mentions of arriving within an hour of the initial call, suggesting slightly faster response infrastructure. For true emergencies, either should serve you well, but Allstar's response time pattern is more documented.
Nelson has documented experience with whole-house repiping and high owner involvement, which are advantages for complex projects. However, major projects involve more labor hours and higher injury risk exposure. If you choose Nelson for repiping, confirming insurance coverage beforehand is even more critical than for a simple fixture replacement.
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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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