Industries
Mechanical Construction for Office, Retail, Hospitality, and Industrial Facilities
Featured Client Projects
Featured Client Projects
Introduction
Heffron has been building mechanical systems for commercial and industrial clients across the Washington, D.C. and Maryland region since 1922. The firm has worked on some of the most recognizable addresses in the capital, from Downtown D.C. office buildings to historic properties to large-scale institutional headquarters. What carries across all of it is the same disciplined, relationship-driven approach: get involved early, execute precisely, and stand behind the work long after the project closes.
Commercial and industrial work at Heffron is not volume-driven. The firm does not chase every project in the market. It takes on the work where its capabilities in design-build judgment, fabrication control, field precision, and senior-level engagement create real value for the client.
What We Do
Base building through tenant improvement.
Adaptive reuse of legacy structures.
Guest-facing mechanical systems.
Ground-floor and multi-tenant work.
Process cooling and facility systems.
Large-scale system replacements.
For complex existing structures.
Ongoing facility care after handover.
How We Work
Commercial projects vary widely in what they demand. A historic renovation presents constraints that a new office building does not. A large-scale retrofit of an existing structure requires a different kind of problem-solving than ground-up construction. Industrial facilities bring process requirements that look more like life sciences work than standard commercial HVAC.
Heffron’s approach is consistent regardless of the project type: understand the constraints first, engage early in the design process where possible, and bring the field capability to execute against whatever the project requires. On complex retrofits and renovations — buildings that cannot simply be stripped and rebuilt — the team’s experience with constrained sites, existing infrastructure, and occupied environments is a significant practical advantage.
For industrial clients, Heffron brings process piping capability, equipment installation experience, and familiarity with regulated production environments that most commercial mechanical contractors do not carry.
In 2018, Heffron was selected to design and build the mechanical and plumbing systems for the Washington Metropolitan Area Transit Authority’s new headquarters — a nine-story building at 300 7th Street SW that had been stripped to its structural concrete for full renovation.
The primary mechanical challenge was the building’s original 1960s-era eight-foot ceiling heights, which left almost no room for conventional mechanical distribution. Heffron engineered a solution using a low-profile Dedicated Outside Air System (DOAS) terminal unit integrated with a VAV air handler, fitting full mechanical capacity into a space that standard approaches could not accommodate. Downtown logistics added further complexity: road closures required coordination with the District, and equipment lifts had to clear active CSX rail tracks running adjacent to the site. The finished building includes offices across 13 floors, a rooftop penthouse, ground floor retail, and a two-deck underground parking structure.
General Contractor: Gilbane Building Company · Engineer: Bala · Architect: Studios Architecture · Award: ENR Mid-Atlantic Best Renovation/Restoration 2022
Heffron has maintained a long-term mechanical service and construction relationship with the U.S. Chamber of Commerce at its Downtown Washington headquarters — a relationship built on consistent responsiveness, technical reliability, and the kind of service engagement that does not require follow-up.
Client Roster
Heffron has performed mechanical construction and service work for commercial and industrial clients across the region, including:
Why Heffron
Commercial mechanical work is where reputation either holds or it doesn’t. There are no FDA deadlines or patient care imperatives to create urgency — the standard comes from within. Heffron’s commercial clients tend to stay because the work is done right the first time, the team is reachable when something comes up, and the relationship functions like a partnership rather than a transaction.
For commercial and industrial construction or service inquiries
