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Comet Plumbing And Sewer vs Signature Plumbing
Santa Clara Plumbing Contractors Comparison · Updated March 2026
Comet Plumbing brings 15 years of licensing experience versus Signature's 6 years, a meaningful difference in tackling complex plumbing problems.
| Comet Plumbing And Sewer | Signature Plumbing | |
|---|---|---|
| Rating | ★ 4.9 | ★ 4.5 |
| Years Licensed | 15 years | 6 years |
| License # | 951887 | 1059875 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | Sunnyvale, CA | San Jose, CA |
| Website | www.call-comet.com | www.signature-plumbing.com |
Key Differences
What Customers Say
Comet Plumbing And Sewer
Customers consistently highlight Comet's rapid response times, detailed diagnostic explanations including camera inspections, and Andrew's personal involvement in troubleshooting complex issues.
Signature Plumbing
Customers praise Signature's emergency responsiveness, punctual arrivals, and versatility across both residential and commercial properties including whole-house remodels.
Key Takeaway: Both companies receive nearly identical feedback on responsiveness and pricing, but Comet's reviews emphasize diagnostic thoroughness while Signature's highlight project versatility across property types.
Customer Reviews
Comet Plumbing And Sewer
Comet plumbing did a excellent job at my home . A fair price, competent, knowledgeable, efficient , clean and professional! Thank you Andy, I will be calling you for future issues if needed.
We had a drain issue right around the holidays and Andrew fixed it that same day. He and his team have always done great work at a fair price!
Andrew from Comet Plumbing was wonderful! He helped install two clean-outs and fixed a root infested pipe for a reasonable price (plus nice discount). I'll definitely be using them again!
Signature Plumbing
Jim and Jay are the absolute BEST plumbers! Jim, the owner, is a clear communicator, trustworthy and thorough. He came out to clear a bad clog at my business, which took 7 hours to get done it was so ...
Jim and Jay did a fantastic job installing our new water heater. Jim was quick to come out when we realized we had a problem and laid out our options and all the pros and cons when we said were trying...
Signature Plumbing did a great job fixing a break in a 4" sewer line. We were able to get it dug up, repaired and backfilled all in one day. Thanks Jim!
Consider Comet Plumbing And Sewer if...
- ✓ Your home is older and plumbing issues may involve diagnosing problems with outdated materials or non-standard configurations that benefit from veteran-level troubleshooting experience
- ✓ You're facing a complex multi-system problem where 15 years of diverse scenarios helps identify root causes faster
- ✓ You prefer working with Andrew directly, as he maintains high owner involvement in fieldwork
- ✓ You're located in Sunnyvale specifically, where Comet is based and has developed extensive local knowledge
Consider Signature Plumbing if...
- ✓ You need commercial plumbing work in addition to residential, as Signature explicitly handles both property types
- ✓ You're managing multiple rental properties and want a contractor experienced with landlord needs
- ✓ You're located in San Jose where Signature is based and may have slightly faster response times
- ✓ Your project involves standard water heater or fixture work where 6 years of experience provides sufficient expertise
Questions to Ask Before Hiring
- → Ask Comet about specific experience with your home's age and plumbing materials, particularly if you have an older system
- → Ask Signature for references from projects similar in complexity to yours, especially if your issue involves diagnosis of hidden problems
- → Confirm same-day availability windows and typical response times from each company to your specific location
- → Request detailed diagnostic approach for your specific issue, including whether camera inspections or other investigative work is included in the initial service call
The Bottom Line
Comet Plumbing holds a clear advantage in experience depth with 15 years of licensing, making them the stronger choice for older homes, complex diagnostic situations, or projects where you want the broadest possible troubleshooting expertise. Signature Plumbing remains a solid choice for standard residential work and offers the added capability of handling commercial properties if that's relevant to your needs. Both companies maintain proper insurance, fair pricing, and responsive service. If your project involves diagnosing hidden problems or working with aging plumbing systems, Comet's veteran status provides meaningful additional value. For straightforward repairs or replacements, either company will serve you well.
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Frequently Asked Questions
For straightforward repairs like fixture replacements or simple drain clearing, both companies have sufficient experience. The gap becomes meaningful when you're dealing with diagnostic challenges, older homes with hidden issues, or situations where initial symptoms might mask deeper problems that veteran-level pattern recognition helps identify faster.
Both companies receive consistent praise for same-day service and rapid emergency response, including weekends and holidays. Your specific location matters—Comet is based in Sunnyvale while Signature operates from San Jose, so response times may vary by a matter of minutes depending on where you live in the county.
Customer feedback indicates both companies price fairly and competitively. Neither shows a pattern of being consistently higher or lower. Both provide clear upfront quotes and explanations before starting work, so you should get comparable estimates for the same project.
No—6 years represents solid experience in the plumbing industry, not a startup phase. Signature has successfully completed whole-house remodels, sewer line work, and complex installations. The distinction is between experienced and veteran-level expertise, not between capable and incapable contractors.
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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 07, 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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