FHA Loans
Can You Buy a Fourplex With an FHA Loan?
Yes – and it is one of the few ways to buy a four-unit building with 3.5% down. Here is the rule that decides whether your deal works.
Yes, you can buy a fourplex with an FHA loan. FHA insures mortgages on one- to four-unit properties, so a fourplex qualifies for the same 3.5% minimum down payment as a single-family house – as long as you live in one of the units. The part most buyers never hear about until underwriting is the self-sufficiency test, and it is where three- and four-unit deals live or die.
Key takeaways
- FHA finances two-, three-, and four-unit properties at the same 3.5% minimum down payment as a single-family home.
- You must occupy one unit as your principal residence. You can rent the rest.
- Three- and four-unit properties must pass FHA’s self-sufficiency test – the projected rents have to cover the full payment. Duplexes are exempt.
- In Maricopa County the 2026 FHA limit on a four-unit property is $1,072,600, well above the national floor.
Can you buy a fourplex with an FHA loan?
Yes. FHA’s Title II forward mortgage programs cover one- to four-unit properties, and the agency treats a fourplex as a single-family residential property with four individual dwellings – not as commercial real estate. That means the same 3.5% minimum required investment, the same FHA credit flexibility, and the same mortgage insurance structure you would get on a house in Gilbert or Mesa.
For a first-time buyer in the East Valley, this is genuinely one of the more powerful moves available. You put 3.5% down, live in one unit, and three tenants help carry the building. That strategy has a name in the investing world – house hacking – but FHA does not call it that or treat it as anything special. To FHA, you are simply an owner-occupant buying a four-unit home.
FHA loans with The Starks Team
We are an independent brokerage, so we shop your FHA scenario across lenders rather than forcing it into one set of overlays – and we have structured Arizona files for 24 years.
You have to live in one of the units
FHA is an owner-occupied program. The borrower must occupy the subject property as their principal residence – there is no version of this where you buy a fourplex with 3.5% down and rent out all four doors. You take one unit, and the other three are yours to lease.
That single requirement is what buys you the low down payment. FHA is willing to insure a small down payment because you are buying a home, not an investment. If your plan is purely investment, skip ahead to the last section – there is a better-fitting tool.
2026 FHA loan limits for 2-4 units in Maricopa County
FHA limits rise with unit count, and they are set by county. Maricopa County sits in the Phoenix-Mesa-Chandler metro area, which FHA designates a high-cost area for 2026 – so the local limits run above the national floor that most national articles quote.
| Units | 2026 FHA limit – Maricopa County | 2026 national floor |
|---|---|---|
| One unit | $557,750 | $541,287 |
| Two units (duplex) | $714,000 | $693,050 |
| Three units (triplex) | $863,100 | $837,700 |
| Four units (fourplex) | $1,072,600 | $1,041,125 |
Source: HUD’s 2026 county-level forward mortgage limits and Mortgagee Letter 2025-23, effective for case numbers assigned on or after January 1, 2026. Limits are set annually and vary by county – confirm yours before you write an offer.
A million dollars of FHA financing at 3.5% down is a real number, and it puts a lot of East Valley fourplexes within reach.
Loan limits are per property, not per unit, and they follow the county the property sits in – not where you live now. A fourplex in Maricopa County and one an hour away in Pinal County can carry different ceilings. Check the county before you fall in love with the building.
Duplexes get in on the buyer’s income. Triplexes and fourplexes have to prove the building pays for itself.– Ken Starks, independent mortgage broker
The self-sufficiency test: why fourplexes fail where duplexes pass
This is the rule that surprises people, and it is the single biggest reason a fourplex contract falls apart in underwriting. For three- and four-unit properties only, FHA requires the property to carry itself on rent alone.
The standard: your monthly PITI – principal, interest, taxes, and insurance – divided by the monthly net self-sufficiency rental income may not exceed 100 percent. Put plainly, the projected rents have to at least equal the payment.
The calculation has a haircut built in that catches people off guard:
- Start with the appraiser’s estimate of fair market rent for all units – including the unit you are going to live in.
- Subtract the greater of the appraiser’s vacancy and maintenance estimate or 25 percent of that fair market rent.
- What is left is your net self-sufficiency rental income. It has to cover the full PITI.
That 25 percent floor is the teeth of the rule. A building whose rents cover the payment on paper can still fail once a quarter of the gross rent comes off the top. And note whose number counts: the appraiser’s market rents, not the seller’s rent roll and not what you think you can charge after renovations.
Two-unit properties are exempt. A duplex qualifies on your income the ordinary way, which is exactly why duplexes are an easier FHA purchase than fourplexes in expensive submarkets. Your lender will also collect form HUD-92561 on any three- or four-unit file.
Because taxes and insurance sit inside PITI, a property can pass the self-sufficiency test in one year and fail in the next on the same rents. Rising insurance premiums have pushed otherwise-solid Arizona fourplex deals under the line. Ask for the appraiser’s market rents early rather than waiting for the appraisal to land.
How to buy a fourplex with an FHA loan
- Confirm you can occupy itYou need to move into one unit as your principal residence. If that is not the plan, FHA is the wrong program and we should be talking about investment financing instead.
- Check the county loan limitFour-unit limits are far higher than one-unit limits. In Maricopa County the 2026 four-unit ceiling is $1,072,600.
- Pressure-test the self-sufficiency math earlyTake realistic market rents, cut 25 percent, and compare what is left to a full PITI including taxes and insurance. If it is close, we find that out before you are under contract.
- Line up 3.5% down plus reservesThe minimum required investment is 3.5% of the adjusted value. On a three- or four-unit property, manual underwriting also calls for three months of PITI in reserves after closing – a one- or two-unit property needs one month.
- Let us shop the fileFHA sets the floor, but lenders layer their own overlays on top. As an independent brokerage we place the scenario with the lender whose guidelines actually fit it.
What if you cannot live in the building?
Then FHA is off the table, and that is fine – it just changes the tool. A fourplex you never occupy is an investment property, and it gets financed as one. Two paths usually make sense:
- A DSCR loan, which qualifies on the building’s rental income instead of your tax returns. For a cash-flowing fourplex, this is often the cleanest structure.
- A conventional investment property loan, which uses your personal income and debt-to-income the traditional way.
Both ask for more money down than FHA. That larger down payment is the price of not living there.
Key terms
- Self-sufficiency test
- FHA’s requirement that PITI divided by net self-sufficiency rental income not exceed 100 percent on three- and four-unit properties.
- Net self-sufficiency rental income
- The appraiser’s fair market rent for all units, less the greater of the appraiser’s vacancy and maintenance estimate or 25 percent of that rent.
- PITI
- Principal, Interest, Taxes, and Insurance – the full monthly housing payment used in the test.
- Minimum Required Investment (MRI)
- The borrower’s own contribution, at least 3.5 percent of the property’s adjusted value on an FHA purchase.
- Reserves
- Liquid funds left after closing. Manual underwriting calls for three months of PITI on three- to four-unit properties, one month on one- to two-unit.
Frequently asked questions
Can you buy a fourplex with an FHA loan?
Yes. FHA insures mortgages on one- to four-unit properties, so a fourplex is eligible with the same 3.5% minimum down payment as a single-family home. The catch is that you must occupy one of the units as your principal residence, and a three- or four-unit property must also pass FHA’s self-sufficiency test.
Do you have to live in the fourplex to use FHA financing?
Yes. FHA is an owner-occupied program, so you must occupy one of the units as your principal residence. You can rent the other three. If you do not intend to live in the building, FHA is not the right tool – an investment property or DSCR loan is the path instead.
What is the FHA self-sufficiency test?
For three- and four-unit properties, FHA requires that the monthly payment (principal, interest, taxes, and insurance) divided by the net self-sufficiency rental income not exceed 100 percent. Net rental income is the appraiser’s fair market rent for all units, including the one you live in, minus the greater of the appraiser’s vacancy and maintenance estimate or 25 percent of that rent. Duplexes are exempt from this test.
How much do you need down on a fourplex with an FHA loan?
The FHA minimum required investment is 3.5% of the adjusted value for borrowers who meet the credit requirements. On a three- or four-unit property you also need reserves equal to three months of the full payment after closing under manual underwriting, where a one- or two-unit property requires one month. Requirements vary by lender and depend on individual qualification.
Looking at a two- to four-unit property?
Send us the address and the unit mix, and we will run the self-sufficiency math before you write the offer – so you know whether FHA works on that building.