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How to Buy a 2–4 Unit with an FHA Loan

How to · Property

How to Buy a 2–4 Unit with an FHA Loan

House-hack a multi-family with a small down payment and rent the other units to offset your mortgage.

VoAtlas editorial Updated · 4 min read
Typical price $480,000 before closing costs
Deposit at 5% $24,000 what you need saved

How we got that: 5% of $480,000. Plenty of loans go lower — 3% on a conventional, 3.5% on an FHA, nothing down on a VA — and plenty of buyers put more in to shrink the monthly payment. Closing costs land on top, usually another 2–5%. Your actual rate and payment depend on the lender, your credit and the day you lock.

Picture a two-flat on a quiet side street, a few blocks from the train. You take the upstairs bedrooms, and you rent the downstairs unit to a friend, a cousin, or a stranger you'll vet carefully. The lawn is yours, the roof is yours, and so is most of the maintenance call when something breaks. Multi-family stock in spring tends to move fast, which means more options but also more competition, so it pays to get your numbers straight before you fall in love with a porch.

An FHA loan lets you buy a two-to-four unit property with as little as 3.5% down if you live in one of the units. That keeps your cash in the bank, but the trade-off is you're carrying the whole mortgage yourself until the rent shows up. The plan below is about making that rent real, in your zip code, with real numbers, and using a 0% intro APR window to give yourself breathing room on the bigger upfront costs.

The 0% intro APR for 15 months on purchases is a timeline, not a discount. Whatever balance is still on the Discover it Cash Back card in month 15 starts accruing the regular purchase APR, and that rate is meaningfully higher than any mortgage. Pay the card off before the intro window closes or refinance the remaining balance into a lower-rate plan — that's the only way this trick actually saves you money.

The steps

  1. 01

    Run the numbers like a landlord, not a buyer

    Pull the rent comps for the non-owner unit from the last 6 months in the same zip code, not the asking rent on a listing site. If the realistic rent doesn't cover the full PITI (principal, interest, property taxes, and insurance) plus a maintenance reserve, walk. House hacking only works when the income side is honest.

  2. 02

    Plan the down payment and closing costs, not just the deposit

    On a $480,000 two-to-four unit with a 3.5% FHA down payment, you're looking at roughly $16,800 down, plus 2%–5% of the price in closing costs (so about $9,600–$24,000). Budget for an FHA appraisal, any required repairs flagged by the inspector, and at least two months of mortgage payments in reserve so you don't get squeezed if a unit sits empty.

  3. 03

    Get pre-approved before you tour, not after

    Sellers in spring don't wait around, and FHA pre-approval letters carry more weight than a pre-qualification. Talk to a lender who's done FHA multi-family loans before, because the underwriting on a 2–4 unit is different from a single-family, and your rental income estimate has to be supported with documentation.

  4. 04

    Use the Discover it Cash Back intro APR for the big upfront cash

    Closing costs, the down payment gap, moving costs, and pre-paid items often land as one large chunk right before closing. If you put a meaningful portion of those on the Discover it Cash Back card, the 0% intro APR for 15 months on purchases means you can pay it down over roughly 15 months without interest piling up. At $480,000 spread across that window, that's about $32,000 per month you'd need to clear before the intro period ends if you put the full purchase price on the card, which you won't — most people put a few thousand to tens of thousands of upfront costs on it, then pay it off well before month 15.

  5. 05

    Set a pay-off date on the card before you ever swipe it

    Pull up a calendar, mark month 15, and work backward. Divide your expected balance by 14 (give yourself a one-month buffer) and set that as your automatic monthly payment. The intro window only helps you if you treat it like a deadline, not a delay.

  6. 06

    Check the card terms before you commit

    Every figure we publish for the Discover it® Cash Back carries the date a person verified it against Discover and a link to where they checked. Intro windows and APRs change without notice, so confirm the current terms before applying.

    See Discover it® Cash Back terms →

Common questions

Can you actually use an FHA loan on a 2–4 unit?

Yes. FHA loans allow up to four units as long as you occupy one of them as your primary residence. The underwriter will count projected rental income from the other units toward your qualifying income, which is why location-specific rent comps matter so much.

How much rent can I realistically charge on the other unit?

You have to check your local market — asking rents online aren't trustworthy. Look at the last 6 months of actual leased comps in the same building or zip code, ideally on multi-family sites or county records. The underwriter will want documentation, so your tenant screening will too.

What happens if I can't find a tenant right away?

You're on the hook for the full mortgage yourself until one signs a lease. That's why lenders want 2–6 months of reserves in the bank at closing, and why running the math with zero rental income is the safer version of the plan.

Is the 0% intro APR really worth using for closing costs?

Only if you have a written plan to pay it off before month 15. If you're going to carry that balance past the intro window, the regular purchase APR is steep and the 'trick' costs more than it saved. Treat it as a 15-month loan, not free money.