Multifamily Loan

A multifamily loan is a mortgage secured by 5-or-more-unit residential property — apartment buildings, condominium projects in lease-up, co-ops, and large rental complexes. The 5-unit threshold is the regulatory line that separates multifamily from 1-4 family residential, which has different underwriting standards, secondary-market channels, and call-report classifications. On bank balance sheets, multifamily loans are reported on Schedule RC-C item 1.d and are included in the bank's CRE concentration calculation despite being secured by residential-use property. The contrast with a first mortgage on a single-family home is structural — the underwriting, foreclosure mechanics, and lien-priority dynamics (first vs second lien) differ from the 1-4 family residential market most note investors know best.

How Does Multifamily Underwriting Differ from 1-4 Family?

The defining difference is whose cash flow services the debt:

For 1-4 family lending, the borrower's personal financial profile carries the underwriting. For multifamily, the property's ability to generate income carries it. A multifamily borrower may have impeccable personal credit, but if the building's net operating income compresses below debt service — through rent declines, vacancy spikes, or expense inflation — the loan defaults regardless of the borrower's separate financial strength.

Multifamily Valuation and Cap-Rate Sensitivity

Multifamily property value is computed by capitalizing NOI:

Property Value = NOI / Cap Rate

Cap rates are the market's required yield on real estate at a given point in the cycle, varying by metro, property class, and rate environment. Movement in cap rates by even 50-100 basis points produces large swings in property value, which directly translates to LTV deterioration on existing multifamily loans.

A Worked Example

A 100-unit apartment building generates $2.0M of annual net operating income. At a 6.0% cap rate, the property values at $33.3M. A bank made the original loan at 70% LTV, so the loan balance is $23.3M.

Two years later, the Federal Reserve has raised rates, and the market cap rate for that property class and metro has expanded from 6.0% to 7.5%:

• New property value: $2.0M / 7.5% = $26.7M
• Existing loan balance: $23.3M (assume minimal amortization on the balloon structure)
• New LTV: $23.3M / $26.7M = 87.3%

The loan went from 70% LTV to 87% LTV without any change in NOI or any borrower behavior — the cap-rate move alone re-priced the collateral. If NOI also compressed during the same period (typical in rising-rate cycles as expenses inflate faster than rent), the LTV could push above 100%, putting the loan structurally underwater.

This cap-rate sensitivity is why multifamily distress tends to cluster around rate-cycle inflection points. The 2022-2024 rate-hike cycle generated a wave of multifamily distress that is still working through the banking system as five-to-seven-year balloons mature into a higher-rate refinance environment.

FHA Multifamily

A meaningful share of multifamily lending — particularly affordable housing and Class B/C properties — is supported by FHA insurance programs administered by HUD. The primary programs:

FHA-insured multifamily loans carry HUD insurance against payment default, which makes them lower-risk for banks holding the loans but introduces servicing and compliance complexity. When FHA multifamily loans default, the workout path runs through HUD claim processes rather than direct foreclosure, and the secondary market for defaulted FHA multifamily paper is structurally different from the conventional market.

Multifamily Distress and Note-Investor Sourcing

Multifamily NPL inventory historically traded thinly compared to 1-4 family residential, but the post-2022 rate cycle has changed the supply picture meaningfully. Banks with concentrated multifamily exposure in markets where cap rates expanded sharply (urban office-adjacent multifamily, rent-regulated jurisdictions facing operating-cost pressure) are now active sellers of both performing and non-performing multifamily paper, with the operational pressure typically visible in compressing ACL coverage and elevated Texas Ratio trajectories. See the FDIC Bankers Resource Center for the supervisory framework that governs multifamily classification and capital treatment under 12 CFR §324.

For pricing, multifamily NPLs typically trade at 40-80% of UPB depending on property class, market, and time-to-maturity on the existing loan. Workout strategies are more structured than residential — typically involving receiver appointments, restructured debt-service schedules, and (where feasible) lease-up acceleration — than the modification/DPO/foreclosure stack that dominates residential NPL workouts.

See current top 50 banks by rising NPL trends, including multifamily-driven distress → Rising NPLs.