Top-Rated San Francisco Plumbers
3 vetted contractors, thoroughly researched and ranked
Last Updated: January 25, 2026
Our Top Pick
One Source Plumbing and Rooter
License #988995 · Verified via CSLB
Owner-operator Mostafa 'Mo' Sowadah personally oversees or performs much of the work, providing a level of diagnostic accuracy and accountability rare in larger firms.
Platform Scores
(7)
(113)
A+
10 yrs
24/7 Emergency
Operating since 2013, this San Francisco-based contractor specializes in trenchless sewer replacement and emergency plumbing repairs. Reviews consistently highlight owner Mostafa 'Mo' Sowadah's personal involvement and ability to diagnose complex issues that other plumbers miss. Best for homeowners needing urgent, high-stakes repairs where expertise and long-term reliability matter more than the lowest bid.
Essential Q&A
What makes them stand out?
Owner-operator Mostafa 'Mo' Sowadah personally oversees or performs much of the work, providing a level of diagnostic accuracy and accountability rare in larger firms.
Who should hire them?
San Francisco homeowners with complex sewer or drainage issues who want a 'fix it once, fix it right' solution and value a 10-year Diamond Certified track record.
Insider tip
Ask for Mo specifically for complex diagnostics; satisfied customers frequently mention his personal expertise saved them from unnecessary repairs proposed by others.
Platform Scores
(115)
(67)
A+
6 yrs
Diamond Certified
American Standard Authorized
Bradford White Authorized
24/7 Emergency
Established in 2018, this company specializes in residential plumbing, drain cleaning, and sewer line replacement. Reviews consistently highlight their exceptional reliability and the use of 'blue booties' to protect customer homes as a key service differentiator. They are best for homeowners seeking high-quality, Diamond Certified workmanship who value professionalism over the lowest possible bid.
Essential Q&A
What makes them stand out?
They have maintained Diamond Certified status for 6 consecutive years, a rigorous qualification that fewer than 5% of companies achieve.
Who should hire them?
San Francisco and Peninsula homeowners needing major work like sewer lateral replacement or water heater installations who prioritize verified quality.
Insider tip
Ask for Faren (the owner), as multiple reviews cite his personal involvement and exceptional communication as a highlight of the service.
Platform Scores
(86)
(472)
A+
18 yrs
Diamond Certified
24/7 Emergency
Established in 2005, this family-owned contractor specializes in residential and commercial plumbing with a focus on drain and sewer solutions. Their most significant differentiator is their Diamond Certified status, held for 18 consecutive years, which validates high customer satisfaction through independent telephone surveys. They are best suited for homeowners in San Francisco and San Mateo counties who prioritize verified quality and long-standing reputation over lowest-bid pricing.
Essential Q&A
What makes them stand out?
They have maintained Diamond Certified status for 18 consecutive years, a rigorous independent verification of quality that very few plumbers achieve.
Who should hire them?
San Francisco homeowners needing major sewer or drain work who want the peace of mind of a verified, long-standing local expert.
Insider tip
Ask about their trenchless sewer solutions if you have landscaping or hardscaping you want to preserve, as they specialize in minimizing disruption.