Compare Local Pros
Castillo Plumbing vs Dinelli Plumbing
San Mateo Plumbing Contractors Comparison · Updated March 2026
Dinelli Plumbing carries workers compensation insurance while Castillo does not, creating liability risk for homeowners who choose the latter.
| Castillo Plumbing | Dinelli Plumbing | |
|---|---|---|
| Rating | ★ 4.9 | ★ 4.5 |
| Years Licensed | 15 years | 24 years |
| License # | 958170 | 801472 |
| Workers' Comp | — | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | South San Francisco, CA | Foster City, CA |
| Website | www.castilloplumbinginc.com | www.dinelliplumbing.com |
Key Differences
What Customers Say
Castillo Plumbing
Customers consistently praise Castillo's fast emergency response times and clear communication throughout urgent plumbing situations.
Dinelli Plumbing
Customers emphasize Dinelli's honest approach to repairs, specifically noting they avoid unnecessary upselling and complete work efficiently.
Key Takeaway: Castillo earns feedback focused on responsiveness during emergencies while Dinelli receives praise for straightforward service practices and integrity in repair recommendations.
Customer Reviews
Castillo Plumbing
Had an emergency and Castillo Plumbing responded quickly, set expectations, and got the job done!
I love the work they did in my house very kind workers and also very understanding would 100% recommend.
(Translated by Google) Excellent service, fast, responsible, and organized. Very good, keep it up! (Original) Excelente servicio rapido y responsables y ordenados muy bien sigan haci .
Dinelli Plumbing
Great sub contractor!! They just get it done and are very professional.
Great plumber,repaired the old valve instead of upselling a new one
Consider Castillo Plumbing if...
- ✓ You need emergency plumbing service and value fast response times, as multiple customers specifically mention Castillo's quick arrival for urgent weekend and after-hours situations
- ✓ Clear communication throughout the service process is your priority, with customers consistently noting organized interactions and willingness to explain work
- ✓ You're willing to verify their liability coverage directly and confirm your homeowner's policy would cover worker injuries, accepting this additional due diligence step
Consider Dinelli Plumbing if...
- ✓ You want to avoid potential liability exposure from contractor injuries, as Dinelli's workers compensation coverage protects you if someone gets hurt on your property
- ✓ You value straightforward service without upselling, with customers specifically praising their approach of repairing existing components rather than pushing replacements
- ✓ The additional nine years of licensed experience matters for your project, particularly if you have an older home with potentially complicated plumbing systems
Questions to Ask Before Hiring
- → For Castillo: Ask what liability coverage they carry and confirm whether your homeowner's insurance would cover worker injuries during the project
- → For both companies: Request references from projects similar to yours in scope and complexity to verify their relevant experience
- → Ask how long their current plumbing crew has worked together to gauge team stability and coordination
The Bottom Line
Dinelli Plumbing is the safer choice for most homeowners due to their workers compensation coverage, which protects you from liability if injuries occur on your property. Their additional nine years of experience and customer feedback about honest service without upselling add further advantages. Choose Castillo only if you need emergency response speed and you've verified your homeowner's insurance adequately covers contractor injuries—and you're comfortable accepting that risk. For standard plumbing projects where liability protection matters, Dinelli offers better homeowner protection.
Get Up to 3 Free Quotes
Compare prices from licensed, verified contractors
Frequently Asked Questions
For routine repairs like drain clearing or fixture replacement, both contractors have plenty of experience. The difference becomes more relevant for complicated projects involving older homes, hidden pipe damage, or troubleshooting elusive issues where Dinelli's additional decade of problem-solving provides an edge. For straightforward jobs, both have sufficient expertise.
If a plumber is injured while working on your property and the contractor lacks workers compensation, your homeowner's insurance could be liable for medical bills, lost wages, and potential legal costs. Before hiring Castillo, call your insurance agent to verify your coverage and understand your exposure. Some policies exclude this coverage or have significant deductibles.
Castillo has specific customer feedback praising their fast emergency response, including weekend and after-hours situations. Multiple reviews emphasize their quick arrival times during urgent plumbing crises. Dinelli's reviews focus more on efficiency and honest service but don't specifically highlight emergency response speed.
Dinelli has fewer documented project types in reviews, but the feedback available emphasizes honest practices and efficient work. Their 24-year track record demonstrates sustained business operations. Ask them directly for references from projects matching your needs to supplement the limited review information.
Looking for the Best?
See our ranked list of top plumbing contractors in San Mateo.
Other San Mateo Plumbing Contractors Comparisons
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.
Get in Touch
Have questions or feedback? We'd love to hear from you.