Every tenant asks the same first question: what's this going to cost per square foot? Here are honest 2026 numbers for the DC market — and the five things that move them.
For the Washington DC metro in 2026, a mid-grade commercial office fit-out — open plan, standard finishes, conventional ceilings and lighting, modest pantry — typically runs $130–$180 per square foot for construction. A high-grade build-out — full-height glass fronts, upgraded millwork, specialty ceilings and lighting, generous pantry/AV — runs $200–$300 per square foot. These align with published RS Means data for the DC market, and they're construction cost only: furniture, cabling, security systems, AV, and design fees ride on top.
Be suspicious of anyone quoting far below these bands. A number 30% under the floor almost always means scope is missing — and you'll buy it back later as change orders, at change-order pricing.
1. Existing conditions. Second-generation space with reusable HVAC distribution, ceilings, and restrooms can land at the bottom of the band. Raw shell, or a gut of a 1980s floorplate, pushes toward the top before finishes enter the conversation.
2. Mechanical, electrical, plumbing. MEP is routinely a third or more of a build-out budget, and it's invisible in the renderings. Added pantry plumbing, supplemental cooling for server or conference rooms, and power density drive it.
3. Building rules. Occupied Class-A buildings impose real costs: after-hours work windows for noisy trades, freight-elevator scheduling, protection requirements, insurance thresholds. On small scopes these fixed costs of admission can be 30–40% of the job — that's arithmetic, not padding, and a bidder who ignores the rules hasn't read them.
4. Schedule. Compressed schedules buy overtime and premium procurement. A realistic 12–16 week construction window for a typical floor is cheaper than a heroic eight.
5. The density of glass and millwork. The two fastest ways to climb from $150 to $250 a foot are interior glazing and custom woodwork. Beautiful — just decide with open eyes.
Demand a line-item estimate built on CSI divisions with explicit inclusions and exclusions, unit prices for likely changes, and the wage basis stated. That's how OAK Builders prices tenant work — our principal spent 15+ years managing federal construction where every line had to survive an audit, including estimates up to $12M. A lump sum with no breakdown isn't a price; it's a promise you can't verify. When you're ready, send us your test-fit or drawings and we'll return a number you can take to your board.
Sometimes. Allowances in the DC market commonly cover a meaningful share of a mid-grade build-out but rarely all of a high-grade one — and they don't cover FF&E, cabling, or design. Model the delta before you sign the lease.
Typical single-floor projects run 12–16 weeks of construction after permits, plus design and permitting time in front. Jurisdiction matters: DC, Arlington, Fairfax, and Montgomery all move differently.
Yes — phased and after-hours work in occupied buildings is a core OAK capability, and we price the phasing into the estimate up front rather than surprising you mid-project.
Yes — permitting and AHJ coordination across DC, Maryland, and Northern Virginia is included in our general contracting scope.
Send drawings or a scope and get a line-item number with honest inclusions and exclusions.