Office, medical, retail, and restaurant build-outs across the District — delivered by a commercial general contractor that plans DC permits, building rules, and occupied-floor phasing into the price before you sign it.
A tenant improvement in Washington, DC is not the same project as one in the suburbs. The building is older, the freight elevator is booked, the floor above you is occupied, the landlord's work letter says one thing and the test fit says another, and the permit path runs through DC's Department of Buildings — with historic-review and public-space wrinkles that can add weeks if nobody saw them coming. The contractors who do this well are the ones who treat those constraints as part of the scope, not surprises. That is how OAK Builders approaches every DC tenant improvement: we price the logistics, the phasing, and the approvals with the drywall and millwork, so the number you sign is the number the project actually costs.
OAK Builders is a commercial general contractor headquartered in Falls Church, minutes from the District line, licensed and insured in DC, Maryland, and Virginia ($1M/$2M CGL). Our principal is a PMP with 15+ years managing construction for federal owners — GSA, the Pentagon, the Library of Congress — which means the documentation habits, schedule discipline, and quality control that federal buildings demand come standard on a 6,000 SF office suite. We build tenant improvements for landlords repositioning space, for tenants fitting out their own leases, and for property managers turning suites between tenants.
Office suites and full-floor build-outs — demo, partitions, ceilings, lighting, finishes, pantries, and the MEP behind them — from spec-suite programs for landlords to headquarters fit-outs for tenants; medical and dental suites, where plumbing-heavy layouts, medical gas, and infection-control phasing change the math; restaurant and retail build-outs, where hood runs, grease ducts, health approvals, and storefront work drive the schedule; association, nonprofit, and professional-services offices, which the District has in unusual concentration; and renovation of common areas — lobbies, corridors, restrooms — that landlords pair with spec suites to move vacant space. Where the project needs design as well as construction, our design-build team carries both under one contract; where an owner has design in hand, we deliver as GC or under construction management.
Published fit-out guides for the DC market put basic office refreshes, mid-range build-outs, and plumbing-heavy medical or restaurant work in very different brackets — and the honest answer is that the work letter, the base-building condition, and the existing MEP determine more of the cost than the finishes do. We wrote a full breakdown in our guide to what a commercial office build-out really costs in the DC area. What we promise on every estimate: a line-item budget tied to a real scope, allowances called out as allowances, and the site conditions we can't see priced as identified risks rather than buried contingency — a real number, not a guess.
Most DC tenant work happens in buildings that stay open. Off-hours demolition, negative-air containment, protected paths from the freight elevator, coordination with property management on noise and utility shutdowns — we plan these into the schedule and the price up front. It is the same occupied-facility discipline our principal's federal projects demanded, applied to a law office that cannot lose a business day.
Call (826) CALL-OAK · 826-225-5625
Email info@oakcgc.com
or use our Request Estimate form.
It depends far more on scope than on square footage: a paint-carpet-and-lighting refresh, a full office build-out with new partitions and MEP, and a plumbing-heavy medical or restaurant fit-out sit in different cost brackets in every published DC-area guide. Our DC build-out cost guide walks through the drivers. We put a real line-item number on your actual scope — free — through our estimate request.
Construction on a typical office suite runs a few months once permits are in hand; the schedule risk in DC is usually in front of construction — permit routing, landlord approvals, and long-lead items like HVAC equipment, storefronts, and specialty millwork. We build the permit path and procurement into the schedule from day one and tell you the realistic move-in date before you sign a lease commencement you can't hit.
Yes. We manage the permit process with DC's Department of Buildings as part of the job, and we flag early when a project touches the approvals that add time — historic-district review, public-space work, or change-of-use questions — so they're on the schedule instead of stopping it.
Yes, that's the normal condition for our DC work. Off-hours noisy work, containment and air management, protected logistics paths, and coordination with property management are planned and priced up front. For tenants renovating in place, we phase the work so your team keeps operating through construction.
Send us the test fit or the work letter — we'll give you a real number and a schedule you can hold us to.