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Castillo Plumbing vs Dittmann Plumbing
San Mateo Plumbing Contractors Comparison · Updated March 2026
Dittmann Plumbing offers 50 years of experience with workers compensation coverage, while Castillo lacks workers comp despite strong emergency response.
| Castillo Plumbing | Dittmann Plumbing | |
|---|---|---|
| Rating | ★ 4.9 | ★ 3.9 |
| Years Licensed | 15 years | 50 years |
| License # | 958170 | 311169 |
| Workers' Comp | — | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | South San Francisco, CA | San Mateo, CA |
| Website | www.castilloplumbinginc.com | www.dittmannplumbing.com |
Key Differences
What Customers Say
Castillo Plumbing
Customers consistently praise Castillo for exceptionally fast emergency response times and professional, courteous service that sets clear expectations.
Dittmann Plumbing
Customers appreciate Dittmann's detailed explanations and punctual service, though some note pricing concerns for certain installation projects.
Key Takeaway: Castillo stands out for response speed in urgent situations, while Dittmann emphasizes thorough explanation and comprehensive problem-solving approaches.
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 .
Dittmann Plumbing
Always responsive in a timely manner and reasonable.
It was a pleasure doing business with the folks at Dittman. They are punctual, knowledgeable, efficient, and professional. Don and Dave helped snake the kitchen drain, Maria answered my many questio...
These fellas know what it takes to resolve most every plumbing issue!
Consider Castillo Plumbing if...
- ✓ You're facing an urgent plumbing emergency on a weekend or evening and need immediate response, as Castillo demonstrates consistently fast emergency service
- ✓ You're willing to verify your homeowner's insurance covers contractor injuries and confirm Castillo's liability coverage directly before work begins
- ✓ You prioritize speed and straightforward communication over decades of specialized experience
- ✓ Your project is routine maintenance or common repairs rather than complex diagnostics on older systems
Consider Dittmann Plumbing if...
- ✓ You want full workers compensation coverage protecting you from liability if someone is injured during the work
- ✓ Your home is older with potentially complicated plumbing systems that benefit from 50 years of diagnostic experience
- ✓ You value detailed explanations of the work process and technicians who walk you through each repair step
- ✓ You're prepared to potentially pay higher rates for comprehensive insurance coverage and multi-generational expertise
Questions to Ask Before Hiring
- → Ask Castillo directly about their liability insurance coverage and confirm with your homeowner's insurance whether you're protected if a worker without workers comp is injured on your property
- → Ask Dittmann for a detailed written estimate to understand their pricing structure compared to other quotes you receive
- → Ask both companies for references from projects similar to yours, particularly if you have an older home with outdated plumbing systems
- → Ask Castillo how they handle worker injuries and what protections exist for homeowners given the lack of workers compensation insurance
The Bottom Line
Dittmann Plumbing is the safer choice for most homeowners due to their workers compensation coverage and 50 years of experience handling complex situations. The workers comp issue alone is significant—without it, you risk personal liability if someone is injured during the work. However, if you're facing an urgent emergency and can verify your homeowner's insurance covers contractor injuries, Castillo's fast response times and professional service may meet your immediate needs. For planned projects or older homes with potential complications, Dittmann's depth of experience and full insurance protection justify their potentially higher pricing.
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Frequently Asked Questions
For straightforward repairs like drain clearing or water heater replacement, both companies have sufficient experience. However, if your home has older galvanized pipes, unusual configurations, or hidden issues requiring diagnosis, Dittmann's 50 years means they've likely encountered your exact situation before. This can mean faster problem identification and fewer surprises during the work.
If a plumber is injured at your home and the company lacks workers comp, they may sue you directly for medical costs and lost wages. Some homeowner's insurance policies cover this, but many have exclusions for business-related injuries. Before hiring Castillo, call your insurance agent to confirm your coverage and ask Castillo about their general liability policy limits.
Higher pricing likely reflects their workers compensation insurance costs, five decades of established overhead, and potentially more thorough diagnostic approaches. This doesn't automatically mean better outcomes, but it does mean more comprehensive protection for you as the homeowner. Compare detailed written estimates from both to see exactly what you're paying for.
Customer feedback suggests Castillo demonstrates particularly fast emergency response, with multiple mentions of quick weekend and after-hours service. Dittmann also handles emergencies including flood response, but their reviews emphasize thoroughness over speed. If response time is your primary concern in an emergency, Castillo appears to excel in this area.
Looking for the Best?
See our ranked list of top plumbing 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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