A modern trade contractor with a two-thousand-year namesake.
Gerasa is a commercial HVAC and plumbing trade contractor based in Ashburn, Virginia — named for the ancient city that mastered the movement of water and air long before the modern engineer existed.
The city that engineered water before the world had a word for it.
Two thousand years ago, Gerasa — the great Greco-Roman city in modern Jordan, the "Pompeii of the East" — moved water with an intelligence that still astonishes engineers. An aqueduct fed a two-storey nymphaeum. Concealed plumbing served fountains and baths. A sewer ran the full 800 metres of the colonnaded Cardo, draining the street through holes cut at precise intervals.
That is our discipline. Gerasa delivers the hidden infrastructure that keeps commercial buildings breathing, flowing and running — air handling, hydronics, ductwork, domestic water, sanitary and storm. Carved-stone precision, delivered with contemporary tools.
A method as deliberate as a Roman roadbed.
Predictable outcomes come from disciplined process. Here is how a Gerasa scope moves from bid to handover.
Preconstruction
We study the documents, model the systems, and return a constructible budget and schedule — flagging risk before it costs you money.
Coordination
Every duct, pipe and hanger is laid out and clash-checked in BIM, then issued as shop drawings the field can build straight from.
Build & Install
Assemblies are prefabbed off-site and installed against the coordinated model — safe, clean, and on the dates we committed to.
Commission & Care
We test, balance and commission to spec, hand over clean documentation, and stay on for the building's mechanical life.
One accountable trade partner
HVAC and plumbing come to you as a single contract and a single point of responsibility — no gaps between scopes, one party answerable for the result.
Schedule you can bid against
Prefabrication and BIM coordination take the guesswork out of the field. We commit to dates — and protect the general contractor's critical path.
Safety is non-negotiable
Every crew works to a safety-first standard. Protecting people and the site isn't a program to us — it's how the work gets done at all.
Let's build something that lasts.
Bid invitations, prequalification packages and project enquiries are all welcome.