Top-Rated Peninsula Plumbers
9 vetted contractors, thoroughly researched and ranked
Last Updated: January 25, 2026
Our Top Pick
Flow Masters Plumbing
License #966337 · Verified via CSLB
They are industry leaders in radiant heating and boiler systems, winning global awards from Lochinvar and serving as designated plumbers for the San Francisco Decorator Showcase House.
Platform Scores
(618)
(53)
A+
SFPHCC Board Member
NARI Accredited Remodeling Company
Certified Hazard Recognition Specialist
Lochinvar Authorized
24/7 Emergency
15 years in business, specializing in radiant heating, boiler systems, and complex residential plumbing. Distinguishes itself with a rare perfect 5-star rating across nearly 600 Google reviews and industry leadership as an SFPHCC board member. Best for homeowners seeking high-end expertise for heating systems or major plumbing renovations.
Essential Q&A
What makes them stand out?
They are industry leaders in radiant heating and boiler systems, winning global awards from Lochinvar and serving as designated plumbers for the San Francisco Decorator Showcase House.
Who should hire them?
Homeowners with hydronic heating systems, boilers, or those planning complex bathroom renovations requiring high-level technical expertise.
Insider tip
For complex radiant heating issues, customers specifically recommend asking for technicians Connor or Juan, who are frequently praised for their diagnostic skills.
Platform Scores
(1,290)
(1,200)
A+
24/7 Emergency
Owner-operated plumbing service specializing in residential repairs, sewer line diagnostics, and water heater installations. Reviews consistently highlight the owner Marco's personal involvement, transparent communication, and use of camera inspections for accurate diagnostics. Best for homeowners in San Carlos and Redwood City seeking urgent, personalized service for complex drainage or sewer issues.
Essential Q&A
What makes them stand out?
The owner, Marco, is frequently cited in reviews for personally diagnosing complex issues using camera technology rather than sending sales-focused technicians.
Who should hire them?
Homeowners with recurring drain or sewer issues who want a definitive diagnosis and explanation from the business owner.
Insider tip
Request a camera inspection for any main line blockages; reviews suggest they are particularly skilled at identifying root intrusions and bellys in pipes.
Platform Scores
(1,895)
(904)
A+
BBB Accredited
24/7 Emergency
Established in 1979, Caccia Home Services is a large, multi-trade contractor specializing in plumbing, electrical, and HVAC solutions. They differentiate themselves with a 'Lifetime Workmanship Pledge' and a 24/7 rapid-response model that appeals to homeowners valuing speed and guarantees over the lowest price. Best for busy homeowners who need immediate, high-quality service and are willing to pay premium rates for extended warranty protection.
Essential Q&A
What makes them stand out?
They offer an industry-leading Lifetime Workmanship Pledge and a 3-Year Parts & Labor Guarantee, significantly exceeding the standard 1-year warranty.
Who should hire them?
Homeowners who prioritize long-term peace of mind and immediate availability over budget pricing.
Insider tip
Join their 'Caccia Care Club' ($9/mo) to unlock priority service and extending warranty benefits, which effectively pays for itself if you have older plumbing.
Platform Scores
(430)
(153)
N/A
24/7 Emergency
9 years in business, specializing in residential plumbing repairs and water heater services. Customers consistently praise their communication, noting text updates and clear explanations from technicians like Justin. Best for homeowners who value responsiveness and detailed education over the lowest possible price.
Essential Q&A
What makes them stand out?
Exceptional communication loop, including text updates on arrival times and immediate responses from dispatch.
Who should hire them?
San Francisco homeowners needing reliable, prompt service for routine repairs or water heater issues who want to be kept in the loop.
Insider tip
Ask for Justin, who is frequently mentioned in 5-star reviews for his patience and ability to explain complex issues clearly.
Platform Scores
(915)
(1,400)
A+
19 yrs
AWWA Backflow Certified
PG&E Trench and Excavation Safety Certified
TECH Clean California Certified
24/7 Emergency
Established in 2002, this company has served San Francisco for over 20 years specializing in emergency plumbing, sewer, and electrical services. They distinguish themselves with Diamond Certification held for 19 consecutive years and a remarkably broad set of license classifications (Plumbing, Electrical, General Engineering). Best for homeowners seeking a verified, multi-trade contractor for complex or emergency situations who value long-term reputation over the lowest bid.
Essential Q&A
What makes them stand out?
They hold an unusually high number of license classifications (A, B, C10, C36, C4, C16), allowing them to handle complex projects involving plumbing, electrical, and engineering without subcontractors.
Who should hire them?
Homeowners with older San Francisco properties requiring extensive sewer/electrical work or those prioritizing verified quality assurance (Diamond Certified) over the lowest price.
Insider tip
Request specific technicians like Franco, Sean, or Phillip, who are frequently praised in reviews for their expertise and honesty.
Platform Scores
(83)
(228)
A+
9 yrs
EPA Certified
Diamond Certified
24/7 Emergency
12 years in business, specializing in residential and commercial plumbing repairs and tankless water heaters. Maintains the prestigious Diamond Certification with over 200 verified customer surveys, distinguishing them for verified quality in a crowded market. Best for homeowners in San Mateo County who prioritize workmanship and long-term reliability over the lowest possible price.
Essential Q&A
What makes them stand out?
They hold Diamond Certification, requiring them to pass ongoing rigorous customer satisfaction surveys, a distinction few local plumbers maintain.
Who should hire them?
Homeowners who want high-end, verified workmanship and are willing to pay a premium for peace of mind and extended warranty support.
Insider tip
Ask about their extended warranties at no additional cost, which is a specific value-add mentioned in their company literature.
Platform Scores
(646)
(540)
A+
PHCC Member
Toto Authorized
24/7 Emergency
26 years in business, specializing in residential plumbing and trenchless sewer solutions. Reviews highlight a team of highly communicative, 'no-nonsense' technicians who prioritize diagnosing root causes over upselling. Best for homeowners in San Mateo County seeking reliable, long-term repairs and who value technical expertise over the lowest initial bid.
Essential Q&A
What makes them stand out?
They hold a rare 'Class A' General Engineering license in addition to standard plumbing credentials, allowing them to handle complex underground and sewer work that other plumbers must subcontract.
Who should hire them?
Homeowners with older properties facing complex sewer, drainage, or repiping issues who want a definitive, long-lasting fix.
Insider tip
Ask for specific technicians by name (e.g., Gert or Mike) as repeat customers frequently cite their consistent, high-quality service.
Platform Scores
(1,648)
(2,400)
A+
24/7 Emergency
14 years in business, specializing in emergency plumbing, drain cleaning, and water heater services. Reviews highlight rapid response times and professional technicians, though some customers note higher pricing for urgent repairs. Best for San Mateo County homeowners requiring immediate, 24/7 plumbing assistance.
Essential Q&A
What makes them stand out?
They emphasize rapid 24/7 emergency response with a fleet of 40+ employees, allowing them to handle urgent calls faster than smaller solo operations.
Who should hire them?
Homeowners with urgent plumbing disasters like backups or burst pipes who prioritize speed of service over the lowest possible bid.
Insider tip
Ask for a clear breakdown of emergency vs. standard labor rates before work begins, as some users report higher costs for immediate dispatch.
Platform Scores
(1,468)
(678)
NR
60%
Diamond Certified
PHCC Member
A. O. Smith Authorized
Kohler Authorized
24/7 Emergency
Over 30 years in business, specializing in residential plumbing, rooter services, and repiping. Distinguished by their Diamond Certification and responsive 24/7 service, though reviews frequently cite higher-than-average pricing. Best for homeowners who prioritize reliability, speed, and warranty protection over the lowest bid.
Essential Q&A
What makes them stand out?
They are Diamond Certified and offer a 100% satisfaction guarantee with rapid 24/7 response times.
Who should hire them?
Homeowners who need urgent, high-quality work and value long-term warranty peace of mind over budget pricing.
Insider tip
Reviews suggest they offer a complimentary safety evaluation, but be cautious of potential upselling for additional repairs during this process.