Top 10 Commercial Plumber in Seattle, WA
The best commercial plumbing companies in Seattle, WA for 2026 include 2 Sons Plumbing, Sewer, Septic, Electric, Heating & Air (4.9), Bee's Plumbing and Heating (4.8), Gene Johnson Plumbing (4.8). All handle commercial buildouts, maintenance contracts, grease traps, backflow testing, and emergency service.
Craftsman Plumbing
2 Sons Plumbing, Sewer, Septic, Electric, Heating & Air
Gene Johnson Plumbing
Anthony's Plumbing Company
Jafco Plumbing and Sewer
Best Plumbing
Mr. Rooter Plumbing of Seattle
Parker Services Plumbing
Ben’s Plumbing & Drain Cleaning
Homeservice Plumbers
How We Ranked These Seattle Pros
Our rankings are based on a weighted evaluation of five key factors:
- Licensing & Insurance — All listed businesses hold active state licenses verified through official databases.
- Customer Reviews — We aggregate ratings from Google, Yelp, and the BBB, weighting recency and review volume.
- Response Time — Companies offering same-day or 24/7 emergency service score higher.
- Pricing Transparency — Businesses who offer flat-rate pricing or free estimates rank above those with opaque billing.
- Experience & Longevity — Years serving the Seattle market and breadth of services factor into overall reliability.
Rankings are reviewed quarterly. Have a correction? Contact us.
Frequently Asked Questions
How is commercial plumbing different from residential?
Commercial plumbing involves larger pipe sizes, more complex systems, code requirements specific to business types, grease traps, backflow preventers, and often requires specialized licensing.
How much does commercial plumbing cost in Seattle?
Commercial plumbing rates in Seattle are $100-$200/hour, higher than residential due to complexity. Service contracts for maintenance run $200-$500/month depending on the building size and fixtures.
Do restaurants need special plumbing?
Yes. Restaurants require grease traps (cleaned monthly), separate waste lines, commercial dishwasher connections, floor drains, and regular backflow testing. Health department inspections verify compliance.