US Agencies Leave About 70% of Office Space Unused, Data Show

About 70% of U.S. federal office space is unused and agencies are occupying less than a third of their space, according to a new congressionally mandated accounting. The underutilization could be costing the federal government billions of dollars annually in real estate expenses. The first‑of‑its‑kind report sets up potential follow‑on actions by the Trump administration to sell federal buildings and cancel office leases, which would be material for government office real estate and related markets.

Analysis

The federal portfolio reallocation is effectively an off-market supply shock concentrated in downtown, mission-adjacent, and security-sensitive assets where private demand is already weak. If disposals and lease cancellations accelerate over 12–36 months, downtown vacancy rates in affected MSAs can jump by 200–400bps versus current secular trends because these buildings are large-block, single-tenant or long-leased assets that won't absorb into the market evenly.

Winners are buyers of distressed CRE debt and flexible-use real estate: managers with dry powder and whole-loan origination platforms can underwrite assets at replacement-cost discounts and earn spread compression as they re-lease or convert. Losers are concentrated office owners and CMBS tranches tied to downtown cash flows; a 200–300bp cap-rate re-pricing combined with 10–20% occupancy loss implies mid-to-high-teens to >30% valuation hits on exposed office equities and subordinate debt.

Second-order effects include heavier issuance and repricing in the CMBS market, pushing supply into opportunistic credit funds and pushing banks to tighten CRE underwriting — expect tighter leverage and higher spreads to persist for 12+ months. Municipal and state governments may try to block or repurpose sales, which will prolong resolution timelines and increase holding costs for sellers, creating a multi-year arbitrage for patient buyers with capital markets access.

Tail risks that could reverse or blunt the move are political/legal interventions, security-driven retention of specific assets, and a swift long-duration rate rally that compresses cap rates; these are lower-probability within 6–12 months but material beyond that. Key near-term catalysts to watch: OMB/GSA sale guidance, tranche-level CMBS downgrades, and any treasury/appropriations language that accelerates or constrains asset dispositions.

Key Decisions for Investors

• Short VNO (Vornado Realty Trust) equity or buy 12-month puts (strike ~15–25% OTM) — thesis: concentrated Manhattan office exposure faces outsized repricing if federal tenants are moved and cap rates widen 200–300bps. Position size: 1–2% of book; downside scenario: 30%+ equity drawdown; worst-case premium loss if using puts limited to option cost.
• Long STWD (Starwood Property Trust) equity or preferred — horizon 6–18 months. Rationale: ability to buy whole loans and CMBS paper at discounts and earn 15–30% IRRs on new deployments; risk: funding spread widening and near-term credit losses could compress NAV; target return 20%+ if deployment executes.
• Pair trade: short SLG (SL Green) / long PLD (Prologis) — 3–12 months. Rationale: relative short on concentrated office exposure versus long on secular logistics demand which benefits from capital flight from downtown cores. Use equal-dollar exposure, delta-hedge sector beta; target relative outperformance 20–30%.
• Buy optionality on distressed CRE: allocate to BX (Blackstone) via long-dated calls or buy BX equity (12–24 months) — Blackstone’s platforms can scale acquisitions of GSA-disposed properties and CMBS. Risk: BX multiples may already price in some of this; expected payoff is asymmetric if a wave of auctions produces asset-level discounts.