Built on trust. Proven for mission-critical work.
Long-term partnerships built on trust, transparency, and results.
Award-winning safety practices that protect every person on every job.
More than a century of mission-critical mechanical construction across the DMV.
Design assist, BIM coordination, and planning that reduce risk before ground breaks.
Client Portfolio

Project Overview
Just blocks from the U.S. Capitol, Gonzaga set out to transform an underused courtyard — framed by the Carmody Center gym, the theatre, Dooley Hall, and the chapel — into a gathering space for the entire student body, paired with a long-overdue rebuild of the cafeteria and kitchen.
Heffron joined the design-build team early, helping plan and budget the work with architect Geier Brown Renfrow and general contractor Whiting-Turner, then self-performed every mechanical and plumbing system in the renovation. The calendar left no margin: construction had to start mid–spring semester and finish before students returned in the fall.
Heffron installed the full HVAC scope and a complete plumbing package — storm, waste, vent, and potable hot and cold water — together with the roof drains, overflow drains, and duplex sump pump that keep a tight urban campus dry. The doors opened on schedule for the 2003–2004 school year.
Engineer: KTA Engineering Consulting Engineers, Corp. · Architect: Geier Brown Renfrow · General Contractor: Whiting-Turner
Project Scope
Project Gallery
Gonzaga College High School campus along North Capitol Street with St. Aloysius Church and athletic field
Dooley Hall facade at Gonzaga College High School during renovation
Low-pressure steam boilers and piping inside the Gonzaga mechanical room
Partner with Heffron
From phased school-year retrofits to ground-up academic builds, Heffron self-performs the mechanical and plumbing scope on a calendar that respects the school’s.