# House hacking: duplexes, spare rooms, the loan rules and the math

Source: https://nobullshitloans.com/wealth/house-hacking/
By Tyler Rood, Loan Officer, NMLS ID # 2064776, Edge Home Finance, LLC (NMLS ID # 891464). Updated 2026-11-09.

## The short answer

House hacking means buying a home you live in and renting out the rest: the other units of a duplex, triplex or fourplex, or spare rooms. As of November 2026, owner-occupied financing means 5% down on a conventional 2 to 4 unit loan with an automated approval, 3.5% on FHA (3 and 4 units must pass a rent test) or nothing down with full VA entitlement. Rent cuts your cost, and every unit can rent once you move.

House hacking is a simple idea: live in the property and let tenants pay part of the mortgage. It works, but the version you see online usually skips the loan rules, the math after you move out, and the slow part. Here is all of it, the way I walk buyers through it.

## What is house hacking?

House hacking means you buy a home as your primary residence, genuinely move in, and rent out the space you don't use. There are two classic versions:

- **A 2 to 4 unit building.** You live in one unit and rent the others. When you move out, you rent yours too. In a triplex, that is three doors instead of one.
- **Rooms in a single-family home.** You live there and rent the spare bedrooms.

An accessory dwelling unit (a basement apartment or a cottage out back) is a third version, with its own zoning and lender questions, so ask before you count on its rent.

The whole thing rests on owner occupancy. Because you live there, you get the small down payment of a primary-residence loan instead of the 20% down (call it 25% with costs) I plan on for an investment purchase. That only works if the move is real.

**Watch out**
If you plan to rent the whole building from day one, it is an investment purchase and it gets financed as one. Calling a duplex your primary to get the lower down payment when you won't live there is mortgage fraud. It's not worth the risk.


## Buying a duplex, triplex or fourplex: what each loan requires

The down payment on a 2 to 4 unit home you live in is much lower than most people expect, and the rules changed recently.


**Loan rules for 2 to 4 units you live in, November 2026**

- Conventional down payment: 5% (with an automated approval, on Fannie Mae and Freddie Mac loans; manually underwritten loans need more down)
- Conventional reserves and your own money: 6 months (Fannie Mae requires six months of reserves and, under 20% down, 5% from your own money before gift funds count)
- FHA down payment: 3.5% (with a 580 or higher credit score)
- FHA on 3 and 4 units: Rent test (the building must pass the self-sufficiency rent test below)
- VA down payment: None (with full entitlement)
- VA rent from the other units: 75% of lease (counts only with landlord experience and six months of reserves)


The old line that a duplex needs 15% down and a fourplex 25% is out of date for Fannie Mae loans with an automated approval. Gift funds have their own rules, covered on my [gift funds page](https://nobullshitloans.com/buy/gift-funds/).

Loan limits are higher for more units. Every Richmond-area locality sits at the national baseline for conforming loans:

| Units | 2026 conforming loan limit | 2026 FHA limit, Richmond area |
|---|---|---|
| 1 | $832,750 | $707,250 |
| 2 | $1,066,250 | $905,400 |
| 3 | $1,288,800 | $1,094,450 |
| 4 | $1,601,750 | $1,360,100 |

Residential mortgage programs stop at four units. Five or more is commercial financing.

My trade-offs, from closing these: multi-units cost more than a single-family home (think a $400,000 house against a $550,000 duplex), the small down payment pushes your debt-to-income ratio up, and mortgage insurance on a 3 or 4 unit with a small down payment gets expensive. How your income and debts set the ceiling is on my [how much house can I afford](https://nobullshitloans.com/buy/how-much-house-can-i-afford/) page.

## How rent from the other units counts

Part of the rent from the units you won't live in can count toward qualifying. Each program has its own method for how much counts and what documents it, and I check it on your file before you make an offer. Two things hold either way. Rent counts by the unit, not by the room: in my files, appraisers don't count by-the-room leases as rent. And the unit you live in adds nothing to your income, since you won't collect rent on it (FHA's test below is the one place its market rent comes in).

## The FHA self-sufficiency test for 3 and 4 units

For a 3 or 4 unit home, FHA requires the building's rent, after a vacancy allowance, to cover the full payment. Duplexes don't have this test. The appraiser estimates market rent for every unit, including the one you'll live in. FHA subtracts 25% for vacancy and maintenance (or the appraiser's estimate, if that is higher), and the full payment divided by what's left can't be more than 100%.

**Worked example: FHA self-sufficiency test: a $600,000 fourplex**
- Market rent, all 4 units ($1,250 each): $5,000
- minus Vacancy and maintenance (25%): $1,250
- equals: Net self-sufficiency rent: $3,750
- Full monthly payment: $4,839
Note: $4,839 divided by $3,750 is 129%. The limit is 100%, so this building fails.
_Hypothetical: 3.5% down, example rate of 6.5% on a 30-year fixed, the loan includes FHA's 1.75% upfront premium, payment includes taxes at Richmond city's 2026 rate, $250 a month of example insurance and FHA's annual mortgage insurance. Rounded._


To pass at that price, the four units would need about $6,450 a month of market rent, roughly $1,613 each. At $5,000 of rent, the price would have to come down to about $458,000. I run this test before you make an offer, not after the appraisal. More on the program itself is on my [FHA loan page](https://nobullshitloans.com/loans/fha/), and FHA's mortgage insurance is explained on my [mortgage insurance page](https://nobullshitloans.com/buy/mortgage-insurance/).

## House hacking with a VA loan

With full entitlement, VA has no down payment requirement and no loan limit, even on a 2 to 4 unit, though you still have to qualify. If part of your entitlement is already in use, the math runs off the one-unit county limit even for a fourplex, so a bigger building can mean a down payment; my [VA entitlement page](https://nobullshitloans.com/veterans/va-entitlement/) walks through it.

VA's rent rule is in the regulation. Rent from the other units counts only if you can show a reasonable likelihood of success as a landlord, judged from past rental management or rent collection experience, and you have enough cash to carry the payments for six months without the rent. Then VA counts 75% of the lease amount. The full veteran playbook is on my page about [building wealth with a VA loan](https://nobullshitloans.com/veterans/build-wealth-with-va/).

## A townhouse is not multifamily

An attached townhouse is a single-family home attached. One door. Two side-by-side townhouses are two separate purchases with two loans. A duplex is two units on one property, bought with one loan. When you search listings, filter for multi-family instead of houses, then check condition and price.

## Renting rooms to pay the mortgage

Renting rooms is the low-cost version: any single-family home works, and you skip the higher price of a multi-unit. Rooms can bring in more in total than renting the whole house to one tenant. The trade-offs are real, though. You share your kitchen with your tenants, turnover runs higher, and it is more work.

Three things to check before you buy for it:

- **Local rules.** Cities and counties can limit how many unrelated people share a house and how a home can be divided, and the rules differ from one locality to the next. Check with the locality before you buy.
- **Your HOA.** Read the documents for rental restrictions before you go under contract.
- **Your qualifying.** Plan to qualify on your own income and treat room rent as money that helps you carry the payment and build reserves. Whether any room rent can count differs by loan program, and I check it on your file.

After you move out, room renting becomes a second job: you are no longer there to keep an eye on things, and turnover climbs. Most of the time I move clients to one lease for the whole house when they leave, and they accept the lower rent for less work.

## The math: will the rent cover the payment?

Here is a duplex bought with FHA, while you live in one side.

**Worked example: A $500,000 duplex with FHA, while you live in one side**
- Principal and interest ($490,944 loan): $3,103
- plus FHA annual mortgage insurance: $221
- plus Property taxes (Richmond city rate): $500
- plus Homeowners insurance (example): $200
- equals: Full monthly payment: $4,024
- minus Rent from the other unit: $2,000
- equals: What you carry while you live there: $2,024
Note: 3.5% down ($17,500). The loan includes FHA's 1.75% upfront premium. Example rate of 6.5% on a 30-year fixed. Closing costs not shown.
_Hypothetical, rounded._


While you live there, the rent cuts your housing cost roughly in half. Now move out and rent your side for $2,250. The building brings in $4,250 against a $4,024 payment, about $226 a month before vacancy and repairs. That is thin: one empty month on the $2,250 unit wipes out most of a year of that margin.


**Chart: Rent against the $4,024 payment on a $500,000 duplex.** Living in one side, the other unit's rent covers about half the payment. Rent both sides and they clear it by about $226 a month, before vacancy and repairs.

|  | Rent coming in each month |
|---|---|
| Living there | $2,000 |
| After you move | $4,250 |

Reference line: Full payment $4,024.

_FHA with 3.5% down ($17,500) and a $490,944 loan that includes FHA's 1.75% upfront premium, at an example rate of 6.5% on a 30-year fixed. The payment includes FHA annual mortgage insurance, Richmond city property taxes and example insurance. Hypothetical, not a quote._


The other side of the ledger: in year one, about $457 a month of the payment is principal, money that stays yours. That is why I judge a rental by the whole picture: as long as it is in the black, you are making money, and a red month smaller than your principal paydown is still not a loss. When I run these numbers for a buyer, I run the carrying cost high on purpose.

**My take**
If your market has a decent duplex at a fair price, it is a great first purchase. If it doesn't, I won't force it. A single-family home you can live in now and keep as a rental later still builds doors, one move at a time.


## House hacking pros and cons

| What works | What bites |
|---|---|
| Rent covers part of your payment while you live there | You live next to, or with, your tenants |
| Owner-occupied down payment: 5% conventional, 3.5% FHA, none on VA with full entitlement | Multi-units cost more, and a small down payment raises your debt-to-income ratio |
| More doors per purchase, and every unit can rent when you move | Mortgage insurance on a small down payment adds up |
| Higher loan limits for 2 to 4 units | One vacancy or repair wipes out a thin margin |
| You learn to be a landlord with your own unit next door | FHA's 3 and 4 unit test and local rules on rooms and short-term rentals |

A few landlord basics I give everyone. Use a signed lease for every unit. Verify income and rental history the same way for every applicant. Don't rush to fill a vacancy: my worst lease came from hurrying, and prepaid rent is no substitute for checking. Keep a bigger cushion than a regular homeowner, because a building with tenants needs repairs on its schedule, not yours. And report the rent: once a property has rental history, lenders generally read it from your tax returns, and rent you never reported can't help you qualify later. How rental income is taxed is a question for your CPA.

When you move out of your unit and buy the next home, the lender looks at the building you're leaving as a rental, and those rules differ by program; they're on my page about [renting out your current home](https://nobullshitloans.com/wealth/rent-out-your-house/).

## Why traditional house hacking is slow, and how to speed it up

The traditional ladder is: buy with the minimum down, live there, move, rent it, buy the next one with the minimum down, and repeat. The problem is that before every purchase you have to save a brand-new down payment and closing costs. On that $500,000 duplex with FHA, 3.5% down plus about 2.5% in closing costs is about $30,000. Saving $1,000 a month, that is 30 months, two and a half years, before each purchase.

The Blue Collar House Hack replaces that saving step: a home equity line opened on the home you live in, while it is still your primary residence, funds the down payment and closing costs on your next primary, and the old home's rent pays the line back down. The full playbook, with its rules and risks, is on my [Blue Collar House Hack](https://nobullshitloans.com/wealth/blue-collar-house-hack/) page.

Either way, the first step is the same: know what the building rents for, what the full payment is, and what you carry when the rent doesn't show up. If those three numbers work, the rest is execution.

## Frequently asked questions

### How long do I have to live in a house hack before I can move out?

My rule is at least 12 months. When you close on a primary residence you sign an occupancy promise, and the whole plan rests on keeping it. If life genuinely changes early, such as a new job or a relocation, document it with your lender instead of hiding it.

### Can I short-term rent the other unit?

Only where your city or county and your HOA allow it. Short-term rental rules vary by locality, and some allow them only when the owner lives on the property. HOA documents often restrict them too, so read both before you buy around that plan.

### Can I buy a duplex with no money down?

With full VA entitlement, yes. VA has no down payment requirement on a 2 to 4 unit home you live in, though you still have to qualify. FHA needs at least 3.5% down, and seller credits cannot be used for that minimum. Conventional loans need at least 5% down with an automated approval.

### Do I need landlord experience to buy a duplex or fourplex?

Not to buy one. If the rent does not count, you qualify on your income alone. On a VA loan, rent from the other units counts only if you can show you are likely to succeed as a landlord (past rental management or rent collection experience) and you have six months of payments in reserve. Other programs set their own rules, so ask before you assume the rent will help you qualify.

## Sources

- [Fannie Mae Eligibility Matrix, Desktop Underwriter, April 1, 2026](https://singlefamily.fanniemae.com/media/20786/display)
- [Freddie Mac, maximum LTV, TLTV and HTLTV ratio requirements](https://sf.freddiemac.com/general/maximum-ltv-tltv-htltv-ratio-requirements-for-conforming-and-super-conforming-mortgages)
- [HUD Handbook 4000.1, FHA Single Family Housing Policy Handbook, Update 18](https://www.hud.gov/sites/default/files/Housing/documents/40001-hsgh-Update-18.pdf)
- [VA.gov, VA home loan limits](https://www.va.gov/housing-assistance/home-loans/loan-limits/)
- [38 CFR 36.4340, VA underwriting standards](https://www.law.cornell.edu/cfr/text/38/36.4340)
- [FHFA, conforming loan limit values for 2026](https://www.fhfa.gov/news/news-release/fhfa-announces-conforming-loan-limit-values-for-2026)

## Disclosures

Individual Originator: Tyler Rood, Loan Officer, NMLS ID # 2064776 (www.nmlsconsumeraccess.org). Licensed in NC, PA, TX and VA.
Edge Home Finance, LLC | NMLS ID # 891464 | www.nmlsconsumeraccess.org. Licensed in all U.S. states & D.C., EXCEPT New York. Edge Home Finance, LLC is a mortgage broker, not a direct lender or creditor. Virginia Broker License MC-7006. North Carolina Mortgage Broker License B-201539. Pennsylvania Mortgage Broker License 81041. Texas: Mortgage Company License, Department of Savings and Mortgage Lending.
Numbers on this page are illustrations, not offers. Any rate shown on this site is an example. Rates may change or may not be available at the time of loan commitment or lock-in.
This is general education, not financial, tax or investment advice. Consult your own financial advisor and tax professional. Home values can go down as well as up.
Edge Home Finance, LLC is a private mortgage broker and is not affiliated with, endorsed by, or acting on behalf of or at the direction of the U.S. Department of Veterans Affairs (VA), the Federal Housing Administration (FHA), the Department of Housing and Urban Development (HUD), or any other government agency.
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