Top 10 Commercial Plumber in Washington, DC
The best commercial plumbing companies in Washington, DC for 2026 include District Capital Services LLC (4.9), Roto-Rooter Plumbing & Water Cleanup (4.8), Haynes Plumbing (4.8). All handle commercial buildouts, maintenance contracts, grease traps, backflow testing, and emergency service.
District Capital Services LLC
Plumber In DC
Haynes Plumbing
Emerald Plumbing Co.
Magnolia Plumbing, Heating & Cooling
Mayco Andrade Plumbing
Spartan Plumbing, Heating and Air Conditioning
Roto-Rooter Plumbing & Water Cleanup
Fry Plumbing, Heating And Air Conditioning Corp.
Plumb Right Plumbing
How We Ranked These Washington 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 Washington 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 Washington?
Commercial plumbing rates in Washington 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.