Residential · Design-Build · Northern Virginia
From room additions to load-bearing changes, Cocell Contracting designs, permits, and builds additions across Northern Virginia under its own Virginia Class A licence #2705190343, with stamped engineering and licensed trade subcontractors working under our contract.
Adding square footage means foundation and framing work, tying new HVAC, plumbing, and electrical into the existing home, and matching the addition to what is already there. Structural changes need a stamped design from a Virginia-licensed engineer and a county building permit before anything is cut. We hold the prime contract and run the sequence — engineer, permit, foundation, frame, rough-ins by licensed trade subcontractors, then finishes — so the new space ties into the existing house on one schedule instead of four.

We start with an on-site consultation, then develop a design and a detailed, line-item scope so you know exactly what is included. Once approved, we run the job through final inspection under our own supervision, with our licensed trade subcontractors on the mechanical work, written change orders before anything is added, and weekly progress updates with photos.
Yes. Structural work needs a stamped design and a building permit. We bring in the engineer, file the permit, and manage the inspection schedule with your Virginia county or city — Fairfax County, Arlington, Alexandria, Loudoun, and Prince William.
Yes, with a stamped beam design and a permit. We arrange the engineering, pull the building permit, and carry out the shoring and the framing under our own contract.
We match roofing, siding, and finishes so the addition reads as part of the original house, not a bolt-on.
Yes — we provide a free on-site estimate with a line-item proposal. Book an appointment to get started.