Can apartment income refinance a mixed-use building with vacant commercial space?

A mixed-use exit described as “supported by the apartments alone” should be tested with a complete property expense schedule. Removing commercial rent is simple. Removing the taxes, insurance, maintenance and shared systems that continue while the space is vacant is usually a different question. The proposed takeout must also fit the actual property configuration and program requirements.

Fannie Mae’s conventional multifamily cash-flow worksheet separately identifies commercial income and its adjustments. It provides a program-specific example of why commercial receipts cannot simply be blended into apartment rent. Its current requirements must be read with the property eligibility provisions and actual transaction facts. Fannie Mae, conventional underwritten net cash flow

Keep the vacant space inside the model

Create a residential-only cash case that sets commercial collections to zero but retains all continuing costs. Identify any variable expenses that truly stop, and support that change with contracts or operating evidence. A vacant commercial unit can still require utilities, security, inspections and repairs. Lost recoveries should be removed from receipts even if the associated common expense continues.

Maintain separate rows for commercial leasing capital. Improvements and commissions may be excluded from a particular NOI definition, but they still require funding. The takeout case should explain whether the space remains vacant, is delivered to a tenant, or is expected to begin paying before the new loan closes.

Do not confuse the ability to calculate apartment-supported debt with program eligibility. Commercial floor area, legal configuration, lease terms and property condition can still matter even when the commercial income contributes nothing to sizing. A zero-income assumption is not a waiver of another requirement.

Hypothetical example: the expense allocation trap

Assume annual apartment effective income is $720,000. Residential direct expenses are $180,000, shared property expenses are $240,000 and unavoidable vacant-commercial costs are $30,000. The residential-only property cash flow is therefore $270,000.

An internal reporting allocation assigns 70% of shared expenses to apartments. That produces a residential segment contribution of $720,000 − $180,000 − $168,000 = $372,000. It is a legitimate segment view if labeled, but it is not the cash available to support debt on the entire property. The missing $102,000 consists of $72,000 of shared expenses allocated to commercial space plus $30,000 of vacant-commercial costs.

The coverage and LTV inputs are hypothetical scenario assumptions, not stated agency or market terms. Other constraints may reduce actual proceeds. At a 2% closing-cost allowance against gross proceeds, modeled net proceeds are $2,646,000. Against a $3.2 million bridge payoff, the required cash contribution is $554,000 before any additional reserves or leasing capital.

Using the allocated apartment contribution of $372,000 instead would imply $3.72 million of income capacity. That overstates the cash-based limit by $1.02 million because it omits expenses that remain obligations of the same collateral.

Reverse-solve the needed exit income

To net $3.2 million after the entered 2% transaction cost, required gross proceeds are $3.2 million ÷ 98%, or approximately $3,265,306. At the assumed 8% debt constant and 1.25× coverage, required cash flow is approximately $326,531. The residential-only case is short by $56,531 annually.

Suppose a commercial lease would add $120,000 of annual rent and $20,000 of incremental annual operating cost, with no recoveries. Its $100,000 net contribution would raise cash flow to $370,000 if recognized as assumed. However, the unchanged $2.94 million LTV capacity would then bind. A successful lease does not automatically eliminate the funding gap; the value assumption, recognized income and other loan constraints must be updated separately.

At $2.94 million gross proceeds, net cash after 2% costs is $2,881,200, leaving a $318,800 payoff gap. Any improvement costs required to obtain the lease are additional uses unless already funded elsewhere. Do not subtract them from income and also charge them as closing cash without identifying the convention.

Make the exit condition measurable

The lender package should show the zero-commercial case, the documented lease case and a downside in which rent starts later. Tie each to a dated rent roll, continuing-expense schedule, leasing budget, actual payoff and current takeout discussion. Identify what must be true before the bridge maturity and which items remain outside the borrower’s control.

If apartments alone do not cover the debt, state the shortfall clearly. The response might involve more equity, a smaller acquisition loan, earlier leasing work or a different exit strategy. The model’s role is to expose the dependency and its cash consequence, not to rename a mixed-use building as purely residential in order to assume away the problem.