The 8 Best Plumbing Companies in Washington DC — 2026

We compared all 18 plumbing companies in Washington DC on the data that matters: services offered, posted hours, and how easy each one is to reach. No pay-to-play — this ranking comes straight from the listings data, updated November 2026.

#1 · Magnolia Plumbing, Heating & CoolingWashington

(888) 829-8510 Website View listing

#2 · Greenpipe Biotech IncWashington

(202) 719-2525 Website View listing

#3 · Haynes PlumbingWashington

(202) 588-1884 Website View listing

#4 · Plumb Right PlumbingWashington

(202) 234-4400 Website View listing

#5 · Plumber In DCWashington

(202) 810-0624 Website View listing

#6 · A H Jordan Plumbing & MechanicalWashington

(202) 529-1058 Website View listing

#7 · H. D. JohnsonWashington

(202) 244-6555 Website View listing

#8 · D H Stevens Co. Plumbing & HeatingWashington

(202) 882-4500 Website View listing

Run one of these businesses? You earned this spot — email contact@plumbingatlas.com for your free “Top Plumbing Companies in Washington DC” badge to put on your site, and we’ll make sure your listing stays accurate.
How we rank: every listing earns points for listed services (drain service, water heaters, sewer service, emergency service), posted hours, and working contact details. The ranking is recalculated with every data update.