This single distinction decides which loans you can use, how much you put down, and how the deal gets underwritten. A property with one to four units is treated as a residential asset, so it qualifies for the same Fannie Mae, Freddie Mac, FHA, and VA programs that finance a house. The moment a building hits five units, it becomes commercial: appraisal shifts to income-based valuation, down payments jump to roughly 25 to 30 percent, terms shorten and often carry balloons, and approval leans on the asset and your experience rather than your personal income.

We focus on the 2-4 unit residential lane because it is where everyday buyers can use low-down, government-backed terms to own a building that helps pay for itself. On a residential 2-4 unit loan, the underwriter is mostly looking at YOU, the borrower, the same way they would on a single-family file, then adding rent from the other units as supporting income. That is a very different, and friendlier, world than a 5-plus commercial deal.

As a veteran-owned broker, Home Loans Inc shops your 2-4 unit file across a wholesale lender network on one application instead of pitching a single bank's product. That matters here because lenders layer their own overlays on multi-unit deals, so the same borrower and the same duplex can be approved by one lender and declined by another on identical numbers.

House hacking is the whole reason 2-4 unit buying is so powerful. You occupy one unit as your primary residence, rent the others, and the projected rental income can be added to your qualifying income, which raises the price you can afford while your tenants help cover the payment. It is the single most efficient way a first-time or move-up buyer turns a mortgage into an asset that works back for them.

The key mechanic is how lenders count that rent. On owner-occupied 2-4 unit loans, the underwriter typically credits 75 percent of the market or lease rent from the non-owner units toward your income. That 25 percent reduction covers vacancy, maintenance, and collection loss, the same cushion baked into the FHA self-sufficiency test. You generally do not need existing leases to use it: a licensed appraiser estimates fair-market rent on a comparable-rent schedule, so projected income counts even on a vacant building.

One honest caveat we tell every house hacker: occupancy is not optional. FHA and VA owner-occupied terms require you to actually live in a unit, typically for at least the first twelve months. After that window you can move out, rent every unit, and the property becomes a full investment, but you cannot buy it as a rental on day one and call it owner-occupied. We structure the file so it is clean and compliant from the start.

Buying a 2-4 unit purely as a rental, with no plan to occupy, is still residential financing, but the owner-occupied perks fall away: expect a larger down payment, since investor 2-4 unit loans typically start around 15 percent down, and slightly tighter terms. You have two main lanes.

The decision between them usually comes down to how your personal income documents and how many properties you already carry. We run both side by side so you choose on real numbers, not a guess.