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Bellanti Plumbing vs Dittmann Plumbing
San Mateo Plumbing Contractors Comparison · Updated March 2026
Two veteran plumbers separated by one year of licensing with Dittmann offering substantially more visibility into actual residential service performance.
| Bellanti Plumbing | Dittmann Plumbing | |
|---|---|---|
| Rating | ★ 3.5 | ★ 3.9 |
| Years Licensed | 49 years | 50 years |
| License # | 327664 | 311169 |
| Workers' Comp | ✓ Yes | ✓ Yes |
| Bond Amount | $25,000 | $25,000 |
| Location | So San Francisco, CA | San Mateo, CA |
| Website | bellantiplumbing.com | www.dittmannplumbing.com |
Key Differences
What Customers Say
Dittmann Plumbing
Customers consistently describe technicians who provide detailed explanations, arrive punctually, and maintain responsive communication throughout service calls.
Key Takeaway: Dittmann provides documented evidence of their residential service approach and customer interaction style, while Bellanti lacks sufficient feedback to assess these critical factors.
Customer Reviews
Bellanti Plumbing
I've used Bellanti a number of times but the most recent job was about a year ago. They put in a temporary MRI modular unit for me and it's worked out great. Ron's a real nice guy to work with.
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 Bellanti Plumbing if...
- ✓ You have a specialized commercial or non-traditional plumbing project like modular installations where their documented commercial experience is directly relevant
- ✓ You're comfortable conducting thorough reference checks to validate their residential service quality since customer feedback is limited
- ✓ You prefer working with a South San Francisco-based contractor rather than one based in San Mateo
Consider Dittmann Plumbing if...
- ✓ You want a documented track record of residential service with clear patterns around communication style and project handling before committing
- ✓ Your project involves common residential work like drain cleaning, fixture repairs, water heater installation, or emergency response where they have proven experience
- ✓ You value detailed explanations and responsive communication throughout the service process, which multiple customers consistently mention
- ✓ You need confidence in punctuality and reliability for scheduling purposes
Questions to Ask Before Hiring
- → Ask Bellanti for at least three recent residential references with contact information and verify their experience with projects similar to yours
- → Ask Bellanti how their pricing structure works and request a detailed written estimate to compare transparency with other bids
- → Ask Dittmann about their pricing approach for your specific project type given feedback mentioning higher-than-expected quotes for installations
- → Ask both companies how quickly they can start and what their current scheduling availability looks like
The Bottom Line
For most homeowners needing a plumber this week, Dittmann Plumbing offers lower decision risk through documented residential performance showing detailed communication, punctual service, and proven capability across typical home plumbing projects. Both companies have equivalent veteran credentials and legal protections, but Dittmann provides transparency about what to expect during service. Choose Bellanti only if their South San Francisco location is significantly more convenient or if you have a specialized commercial project matching their documented experience, and commit the time to thoroughly vet their residential service quality through direct references.
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Frequently Asked Questions
No, the difference between 49 and 50 years is negligible in practical terms. Both companies have operated through multiple generations of plumbing technology and code changes, giving them equivalent depth of experience. The meaningful difference is in documented residential service performance, not the single year of licensing.
Established companies sometimes focus more on commercial work, repeat business relationships, or referral networks rather than public review platforms. This doesn't indicate poor service, but it does mean you'll need to request direct references to assess their residential customer service approach before hiring.
The data doesn't allow direct price comparison. Some Dittmann customers found installation quotes higher than expected, but without Bellanti's pricing information or specific project details, you cannot conclude which is more expensive. Request detailed written estimates from both for your specific project to compare.
Dittmann has documented experience with emergency flood response and demonstrates consistent responsiveness according to customer feedback. Bellanti may offer equivalent emergency service given their long tenure, but you'll need to ask directly about their emergency availability, response times, and after-hours protocols since this isn't documented in available information.
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 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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