Top 10 Commercial Plumber in Portland, ME
The best commercial plumbing companies in Portland, ME for 2026 include Zoom Drain (4.9), Heritage Home Service (4.8), AT Plumbing Services, LLC (4.9). All handle commercial buildouts, maintenance contracts, grease traps, backflow testing, and emergency service.
Heritage Home Service
Coastline Plumbing LLC
TJ Plumbing and Heating
AT Plumbing Services, LLC
Richard P Waltz Plumbing & Heating Inc
Rudi the Plumber Inc
Darling Plumbing & Heating
Snyder Plumbing & Heating
MB Mechanical Contractors
Zoom Drain
How We Ranked These Portland 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 Portland 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 Portland?
Commercial plumbing rates in Portland 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.