Serving the Washington Metropolitan Area Since 1990

Specializing in Commercial Tenant HVAC and Plumbing Services

Modern office interior with a small round table and four chairs in the foreground, a large planter with green plants, workspaces and a glass-enclosed meeting room in the background, and exposed ceiling pipes.
Construction workers installing electrical or data wiring on ceiling with ladders and metal framing.

Serving the Washington Metropolitan Area Since 1990 — Specializing in Commercial Tenant HVAC and Plumbing Services

For over 35 years, Potomac Mechanical Contractors, Inc. has provided reliable mechanical contracting services across the Washington Metropolitan region.
We specialize in Commercial Tenant HVAC & Plumbing new construction and service projects, offering dependable workmanship and responsive service.

Our experienced team delivers quality results — on time, on budget, and with safety as our top priority.

From new installations to maintenance and emergency repairs, we’re committed to keeping your building systems running efficiently.

Industries Served

Law:

  • Orrick, Herrington & Sutcliffe LLP

  • Hyman, Phelps & McNamara

  • Nelson Mullins

  • Cohen Milstein Sellers & Toll

  • Axinn, Veltrop & Harkrider

  • Sullivan & Cromwell

  • Covington & Burling

  • Fenwick & West

  • Stern, Kessler, Goldstein & Fox

  • Vedder Price

  • Davis, Wright & Tremaine

  • Van Ness Feldman

  • Fox Rothschild

Financial Services:

  • Bank of America

  • Blackrock

  • Bloomberg

  • Capital One

  • CitiBank

  • Fidelity

  • FINRA

  • Robinhood

  • Wells Fargo

Tech:

  • Amazon

  • Alarm.com

  • Google

  • Iron Bow

  • Microsoft

  • Netflix

  • Oracle

  • OpenAI

  • SAP

Government:

  • DOD

  • DOJ

  • DHS

  • CBP

  • GSA

  • IRS

  • Lockheed Martin

  • Peraton

  • Raytheon

  • RTX

  • SAIC

Modern classroom or studio with large windows, brick walls, tables, chairs, and various projects and tools on display.

Why Choose
Potomac Mechanical Contractors

  • Over 35 Years of Experience

  • Reliable, Professional Service

  • Skilled Technicians and Project Teams

  • 24/7 Emergency Support

A woman sitting on a helicopter's wheel on a grassy area, with her arms crossed, smiling, and wearing sunglasses, with tall brick buildings in the background.
Two workers on a yellow lift inside an industrial or warehouse building, working near ceiling ventilation ducts and insulation.
A helicopter flying in the sky with a hook carrying a box hanging below it over trees and a road.
Two workers are on a yellow scissor lift inspecting or working on an industrial duct system in a building under construction or renovation.

A Tradition of Quality and Dependability Since 1990

Founded by Robert Weaver, Potomac Mechanical Contractors, Inc. has built a reputation for professional, dependable service throughout the Washington Metropolitan area.

Specializing in commercial HVAC and plumbing systems, Potomac Mechanical is staffed with a highly trained management and technical team committed to delivering the highest level of service and professionalism on every job.

For more than three decades, our success has come from teamwork, integrity, and a dedication to doing the job right.

As we move forward into our next generation, Potomac Mechanical remains focused on providing trusted mechanical solutions for our clients across the region.

HVAC Services

Potomac Mechanical Contractors provides complete commercial HVAC solutions, including installation, repairs, and preventative maintenance.

Our technicians and mechanics are experienced in a variety of tenant mechanical systems that include sheetmetal, steamfitting and refrigerant piping.

HVAC Services Include

  • Installation & Replacement Systems (VAV, DOAS, FPIU, VRF, RTU, CRAC, Split Systems, AHU)

  • Repairs & Warranty Support

  • Preventative Maintenance Programs

  • Budget Planning

  • 24-Hour Emergency Service

PMC Mechanical HVAC Services
A large black industrial machine labeled "VERTIV" and "Liebert DS" in a room with white pipes and a wooden door.
Construction workers on ladders installing or repairing ceiling ductwork inside a building under construction.
PMC Mechanical HVAC Services
Industrial HVAC or refrigeration system with copper piping, gauges, and a large metal unit labeled 'United Cool Air' in a utility or mechanical room.
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Interior of a building under construction with exposed ceiling pipes and ductwork, construction equipment, and partially finished walls.

Plumbing Services

Serving clients since 1990, Potomac Mechanical offers a full range of commercial plumbing services. Our experienced plumbers handle everything from small repairs to large system upgrades.

Plumbing Services Include

  • New Restrooms & Upgrades

  • Pantries

  • Water Heater Replacement

  • Backflow Testing & Certification

  • ADA Upgrades & Fixture Replacement

  • Leak Repairs & Drain Cleaning

  • Gas Lines

Project Gallery

Trusted by Leading Businesses and Organizations Since 1990

For over 35 years, Potomac Mechanical Contractors, Inc. has earned the trust of respected general contractors, property managers, and facility owners throughout the Washington Metropolitan area.

Our focus on quality, reliability, and professionalism has helped us build lasting partnerships.

  • Adventist HealthCare
  • Clune Construction
  • Davis Construction
  • DWatts Construction
  • HITT Contracting
  • JLL/SAIC
  • Mazzuca Contracting
  • MRP Realty
  • Pizzano Construction
  • Rand Construction
  • RFF Properties