About Us

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Who We Are

Sigma Plumbing Mechanical Contractors is a family owned and operated small business in the DC area. We have been working in the plumbing industry for over 40 years from our beginnings in Kalamata, Greece to our Washington D.C. location today. We are proud to bring excellent customer service and professional work to every project along with competitive bidding prices. Our staff is available to you 24 hours a day, 7 days a week.

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What We Do

We specialize in Residential and Commercial Plumbing, Underground Site Utilities, and HVAC Ground-Up New Constrcution, Renovations, Tenant Fit-Outs and More.