Loans for Multifamily Homes: 1-4 Unit vs. 5+ Unit Financing

No, a 1-4 unit property and a 5+ unit property aren't financed the same way. A 1-4 unit property is treated as residential and qualified through a DSCR loan, the same category as a single-family rental. A 5+ unit property is treated as commercial multifamily and qualified on the building's overall net operating income (NOI) instead.

That single dividing line, 5 units, determines which product you're actually applying for, how the lender evaluates your deal, and what documentation you'll need. Below, we'll walk through how each side works, what actually changes at the 5-unit mark, and which one fits the property you're looking at. If you've searched for loans for multifamily homes and gotten mixed results, it's usually because that search covers both sides of this split at once.

Are 1-4 Unit and 5+ Unit Properties Financed the Same Way?

No. The unit count alone routes you into one of two completely different underwriting models. A 1-4 unit property is qualified through a DSCR loan, based on that property's own rental income against its own debt payment. A 5+ unit property is qualified as commercial multifamily, based on the entire building's net operating income against its total debt service.

This is the exact split that shows up across our own lending programs: our single family rental loans cover 1-4 unit residential properties, while our multifamily term loan program starts at 5+ residential units. There's no single product among multifamily real estate loans that treats both the same way, because the underlying risk and income analysis genuinely are different.

How Are 1-4 Unit Properties Financed?

A 1-4 unit property — a single-family home, duplex, triplex, or fourplex — is treated as residential financing, not commercial. It's underwritten the same way a single-family rental is: through a DSCR loan, where approval is based on the property's rental income relative to its debt obligation, not the building's unit count or a commercial appraisal.

On our single family rental loan program, that means no W-2s, no tax returns, and no employment history review. We look for a DSCR of 1.0x or above, meaning monthly rental income needs to cover or exceed the property's full monthly debt obligation, alongside a minimum credit score of 660+. Eligible property types include SFR, condo, townhome, and 1-4 unit residential, up to 80% loan-to-value with a 20% minimum down payment, and 30-year fixed terms. A 1-4 unit rental falls squarely inside that eligibility window, which is why it gets treated as residential rather than commercial, even when it has multiple units under one roof.

How Are 5+ Unit Properties Financed?

Once a property crosses into 5 or more residential units, it's treated as commercial multifamily, and the underwriting shifts from evaluating one property's rent-to-debt ratio to evaluating the entire building's income performance.

Our multifamily term loan program qualifies these deals on the property's Net Operating Income (NOI) and asset value, not the borrower's personal income. Minimum DSCR requirements sit at 1.20x-1.25x, calculated by dividing the building's NOI by its debt service, higher than the 1.0x threshold on a 1-4 unit DSCR loan, reflecting a different underwriting model built around the whole asset's operating performance rather than a single rent check. We look for stabilized properties, generally 85%+ occupancy preferred, and the loan can be used to acquire, refinance, or cash-out on apartment buildings, condos, townhomes, and mixed-use properties with majority residential space. This structure is common among multifamily mortgage lenders serving investors, though the specific DSCR thresholds and occupancy preferences vary by lender. No personal income verification is required on our program, but the qualification metric itself, NOI instead of a single property's rent-to-PITIA ratio, is what actually changes.

Side-by-Side: What Changes at the 5-Unit Mark

The core shift is what the lender is actually measuring. On a 1-4 unit deal, it's one property's rent against one debt payment. On a 5+ unit deal, it's the building's total operating income, revenue minus operating expenses, against its debt service, a fundamentally commercial underwriting approach even though the property itself might look like "just a bigger apartment building" from the street. Both sides sit under the umbrella of multifamily real estate loans in a loose sense, but only one of them is actually underwritten as commercial multifamily.

Which One Do You Actually Need?

Count your units first, then match the loan type to that count.

If you're buying or refinancing a single-family home, duplex, triplex, or fourplex, 1 to 4 residential units, you're looking at a DSCR loan through our single family rental program, regardless of whether you think of it as a "rental" or a "small multifamily" property. The unit count is what determines the product, not how you personally categorize the deal.

If you're buying or refinancing a building with 5 or more residential units, an apartment building, garden-style complex, or mixed-use property with majority residential space, you're in commercial multifamily territory, and you'll want our multifamily term loan program instead. That's true whether the property is a first acquisition or a portfolio expansion using multifamily investment loans, and it applies whether you're buying to hold long-term or refinancing to pull cash out of an asset you've already stabilized. If you've already built equity in a stabilized building and want to extract it without selling, that's what a multifamily refinance loan is structured for on our end.

Where to Go Next: InstaLend's Loan Options for Each

If your property has 1-4 residential units, the loan you want is our single family rental (DSCR) program, no income verification, 1.0x minimum DSCR, up to 80% LTV, and 30-year fixed terms. Explore InstaLend's single family rental loans to see the full qualification details.

If your property has 5 or more residential units, you're looking at our multifamily term loan program instead, qualified on NOI and asset value, available for acquisition, refinance, or cash-out, with loan amounts from $500,000 to $10M+. We structure the deal around your property's income and your exit strategy. Our multifamily investment loans are used for everything from a first apartment building purchase to a multi-property portfolio expansion. Explore InstaLend's multifamily term loans to see current terms.

Whether you're a first-time buyer or comparing multifamily mortgage lenders as an experienced operator, the unit count on the property in front of you is what settles which of our two programs applies.

Not sure which side of the 5-unit line your property falls on, or whether a mixed-use asset qualifies as majority residential? Submit your property details through either page above and our team will confirm the right fit before you apply. And if you're already weighing a multifamily refinance loan against a straight sale on a property you've stabilized, that's exactly the kind of question worth walking through with us directly.