Office real estate carries more binary outcomes than most replacement categories right now. A fully leased single-tenant building and a half-vacant multi-tenant tower can sit on the same street with entirely different closing risk, and the difference rarely shows up in a listing summary.
Before identifying an office building, the buyer needs to know exactly what is leased, to whom, on what terms, and what capital the owner still owes to keep those leases in place. Rent that looks strong on a rent roll can be offset by tenant-improvement and leasing-commission obligations large enough to erase a year or more of income.
Office replacement candidates should be sourced from brokers and owners who can produce the underlying lease documents quickly, since the diligence window in this category is often the longest of any property type and there is little room to lose weeks waiting on paperwork.
Request every executed lease and amendment, not a rent-roll abstract. Confirm base rent, escalations, expense structure, renewal options, termination rights, and any co-tenancy or exclusive-use clauses that could affect future leasing.
Distinguish single-tenant net lease exposure from multi-tenant gross or modified-gross exposure. A single-tenant building concentrates risk in one credit; a multi-tenant floor plan spreads risk but adds common-area expense reconciliation, vacancy churn, and re-leasing cost that a rent roll alone does not show.
Confirm weighted average lease term across the rent roll and identify any large block of space rolling within the first three years of ownership. A short weighted average lease term changes both financing terms and the capital plan a buyer must fund.
Request financial statements or credit reports on tenants representing a material share of income, along with payment history from the property manager. A tenant that signed a strong lease five years ago may be paying late today.
Ask directly how much of the building's space is actually occupied and in use, separate from leased. Remote and hybrid work has left some tenants paying rent on space they have partially vacated, which affects renewal probability even though current income looks unaffected.
Review any sublease activity on the rent roll. A subleased floor means the original tenant remains liable for rent, but the buyer inherits the credit and re-leasing risk of whoever eventually occupies the space.
Total the tenant-improvement allowances, leasing commissions, and free-rent periods the current owner has committed to but not yet paid, for both signed leases and any renewal options tenants are likely to exercise. These obligations transfer to the buyer at closing in most contracts.
Add base building capital such as roof, HVAC plant, elevator, parking structure, and life-safety system condition. Office buildings built before modern code cycles often carry deferred capital that a seller's marketing package understates.
Underwrite a re-leasing reserve for any near-term vacancy. Office tenant-improvement costs per square foot are typically higher than retail or industrial, and the time to re-lease a vacated floor can extend well past the exchange closing date.
Check the parking ratio against current zoning and tenant expectations. A building priced on older office density can be underparked for today's tenant requirements, which limits the pool of future replacement tenants.
Review the HVAC control system, elevator maintenance contracts, life-safety certifications, and any building automation or security infrastructure tenants now expect as standard. Buildings that have not been upgraded compete poorly for renewal-stage tenants even when the base rent is attractive.
Confirm certificate of occupancy status, accessibility compliance history, and any open code violations with the local building department before contract, since these items can stall both financing and title work.
If no office building clears lease, credit, and capital diligence in the time available, a Delaware statutory trust holding office assets can serve as a documented backup, subject to current offering availability and investor eligibility. Office DST offerings vary widely in tenant credit and lease term, and the sector's occupancy volatility makes offering-document review especially important here.
Compare any office DST's rent roll, tenant concentration, and remaining lease term against the direct building candidates under review, rather than treating the passive structure as a lower-risk substitute by default.
