Can you use a DSCR loan on a duplex or fourplex?

Yes — two-to-four unit residential properties are commonly eligible for DSCR financing, and they frequently produce stronger coverage than a single-family rental at the same price. The ratio uses the combined gross rent from every unit against the property's single monthly payment.

That last point is the whole advantage. A fourplex carries one mortgage, one tax bill, and one insurance policy — but collects four rent checks. The income side of the ratio scales with unit count while the expense side largely doesn't.

The math on a small multifamily

Nothing about the formula changes. Add up gross rent from all units, divide by PITIA:

What's different about a 2-4 unit file

• The appraisal is a different form. Two-to-four unit properties use the small residential income property appraisal report, which includes a rent schedule for each unit. It typically costs more and takes longer than a single-family appraisal — budget for both.
• Leases are reviewed per unit. Expect to provide every executed lease. Month-to-month tenancies and vacant units are commonly handled with the appraiser's market rent estimate instead.
• Insurance is structured differently. A multi-unit landlord policy is not a single-family landlord policy, and the premium difference is large enough to change your PITIA meaningfully. Get a real quote before you run the ratio.
• Down payment parameters can differ. Multi-unit properties are commonly treated somewhat differently than single-family under the same program.

The vacancy question

Investors regularly ask whether a partially vacant building can still qualify. Usually yes — vacant units are commonly qualified on the appraiser's market rent rather than an executed lease.

What changes is the treatment. Programs vary in how they handle vacancy, and some apply more conservative figures when several units are empty at once. A fourplex with three leases and one vacancy is a routine file; a fully vacant fourplex is a different conversation and worth raising before you're under contract rather than during underwriting.

The five-unit line

Four units is the ceiling for residential DSCR financing. At five units the property becomes commercial multifamily, which means different appraisal standards, different loan structures, and generally different terms.

This catches people who assume the progression is smooth. It isn't — a fourplex and a five-unit building sit on opposite sides of a meaningful line. If you're weighing a five-unit property, price the financing separately rather than assuming your fourplex experience carries over.

You cannot live in one of the units

Worth stating plainly, because it's the most common misunderstanding on this topic. DSCR loans are business-purpose loans for investment property. They are not available for owner-occupied residences — including house hacking, where the buyer lives in one unit and rents the others.

Occupying a unit financed with a DSCR loan generally violates the terms of the loan. If your plan is to live in one unit of a duplex or fourplex, you need a different type of financing, and that's a conversation to have at the start rather than after you're under contract.

Where small multifamily gets harder

• Higher operating costs. Four units means four sets of turnover, maintenance, and tenant management. DSCR qualification uses gross rent and ignores this — but your actual returns won't.
• Concentrated risk. One roof, one foundation, one neighborhood. A single-family portfolio spread across areas diversifies in a way one building can't.
• Thinner buyer pool at exit. Small multifamily sells to investors, not to owner-occupants, which can mean a slower sale.
• Insurance volatility. Multi-unit premiums have moved sharply in some markets, and a renewal can compress the coverage you underwrote to.

Frequently asked questions