How Much Money Do You Need to Buy a Duplex?

The short answer: buying a $300,000 duplex you’ll live in takes about $10,500 down with an FHA loan (3.5 percent), and lands around $24,500 all-in once closing costs and reserves are counted — before any down-payment assistance. The dollar-by-dollar breakdown is below.

A concrete breakdown of the cash it actually takes to buy a two-unit home you live in, and why the number is usually smaller than people assume.

The most common reason people talk themselves out of buying a duplex is that they think they need a pile of money they’ll never have. They picture the 20 or 25 percent down payment an investor puts on a rental and decide it’s hopeless. That figure is real, but it doesn’t apply to you if you’re going to live in the building. When you occupy one of the units, you buy with the same kind of low-down-payment loans available to regular homebuyers, and the cash required drops sharply.

I bought a $470,000 duplex, lived on one side, and rented the other. Before that I lived in a van for about thirteen months, then in a small starter home I bought through a county first-time-buyer program. I was not a person with a large bank account. This post walks through the actual cash it takes to buy a duplex you’ll live in, line by line.

If you want the bigger picture of how this whole approach works, start with What Is House Hacking?

The four costs you’re actually covering

Buying a duplex takes cash in four buckets: the down payment, closing costs, upfront reserves, and a small buffer for early repairs. Most people only think about the first one. The other three are smaller but real, and ignoring them is how buyers end up scraping their account to zero on closing day.

The down payment

This is the largest piece, and it’s where the occupancy rule matters most. Because you’ll live in the property, you qualify for owner-occupied financing. An FHA loan lets you buy a one-to-four-unit home with as little as 3.5 percent down, according to the U.S. Department of Housing and Urban Development, as long as you live in one of the units.

Run that against real prices. On a $300,000 duplex, 3.5 percent is $10,500. On a $470,000 duplex like mine, it’s about $16,450. Compare that to the investor path, where 25 percent down on that same $470,000 building would be $117,500. The difference isn’t a small discount. It’s the entire reason living in the property is the affordable way in.

There are other low-down-payment loans too. Conventional owner-occupied loans can go as low as 3 to 5 percent for many buyers, and if you qualify, a VA loan can reach zero down for eligible veterans. FHA is the most common route for two-to-four-unit house hacks, but it’s worth asking a lender which of these fits you best, because the down payment is the biggest lever on how much cash you need. I’ve written the FHA path in full here: FHA House Hacking With 3.5% Down.

Closing costs

Closing costs are the fees to originate the loan and transfer the property: lender fees, appraisal, title work, recording, and prepaid items like the first chunk of property taxes and insurance. As a rough planning figure, expect roughly 2 to 5 percent of the purchase price. On a $300,000 duplex, that’s somewhere between $6,000 and $15,000; on a $470,000 building, more.

The useful thing to know is that closing costs are negotiable in ways the down payment isn’t. You can ask the seller to cover part of them, a common arrangement called seller concessions, and you can shop lenders, since their fees vary. First-time-buyer and down-payment-assistance programs frequently help with closing costs specifically, not just the down payment. So while you should budget for this bucket, you don’t always pay all of it from your own pocket.

Upfront reserves and the FHA rule for larger buildings

Lenders often want to see that you have a few months of mortgage payments in the bank after closing, called reserves. On a duplex this is usually a modest requirement or none at all, but it’s worth confirming with your lender so it doesn’t surprise you.

One rule matters if you look beyond two units. For three- and four-unit properties, the FHA adds a “self-sufficiency test” that requires the projected rent to cover the entire mortgage payment. Duplexes are exempt from that test, which is one more reason a two-unit building is the friendliest starting point. If a triplex or fourplex tempts you, know that the qualifying bar is higher.

A buffer for early repairs

This isn’t a lender requirement, but it’s the one I’d never skip. A duplex has more of everything that can break than a single-family house: two kitchens, sometimes two furnaces, more plumbing and roof. You want a few thousand dollars sitting in reserve after you close so that a failed water heater in month two is an annoyance instead of a crisis. Plan to walk away from the closing table with cash left over, not an account scraped to zero.

Putting the number together

Here’s a realistic total for a $300,000 duplex bought with an FHA loan:

• Down payment at 3.5 percent: about $10,500
• Closing costs at roughly 3 percent: about $9,000
• Repair and safety buffer: about $5,000

That lands around $24,500 in cash to buy a $300,000 two-unit home you live in. It’s a real number and not a small one, but it’s a long way from the $60,000-plus an investor would need for the same building, and assistance programs can shave the down payment and closing costs down further.

Where the down payment help comes in

Most people assume they have to save every dollar of this alone. Often they don’t. As of April 2026 there were 2,679 homebuyer assistance programs nationwide, according to Down Payment Resource, and 934 of them allowed the purchase of two-to-four-unit properties, exactly the kind of building you’re after. I used a county first-time-buyer program to get into my first home, an $185,000 starter I couldn’t have bought otherwise.

These programs are poorly advertised, so search your state housing finance agency and your county together with “first-time homebuyer assistance,” and ask any lender you talk to which ones you might qualify for. An afternoon of looking can knock thousands off the cash you personally have to bring. If you’re still building toward the number, I wrote about doing it from a standing start here: Saving a Down Payment From Nothing.

Run your own numbers

The figures above are planning estimates. Your real number depends on the price you’re buying at, your loan, your local taxes, and what assistance you qualify for. Before you decide a duplex is out of reach, put an actual listing into the free house hacking calculator with the price and your loan terms. It shows both the cash to close and what your monthly cost drops to once the other unit’s rent comes in, which is the number that tells you whether the deal is worth it. When I run my own duplex, the rent from the other unit and a basement short-term rental brings my effective housing cost down to a few hundred dollars a month, and seeing that on a specific property is what turns “someday” into a plan.

The point

You don’t need investor money to buy a duplex you’ll live in. With an owner-occupied loan you’re looking at roughly 3.5 percent down, a few percent for closing costs, and a repair buffer, which on a $300,000 building lands around $24,500 before any assistance. Down-payment and closing-cost programs can lower even that. The upfront cash is a hurdle few buyers actually measure. Measure it against a real listing, and it’s usually smaller and more reachable than the number in your head.

For the bigger picture beyond duplexes, here is how much money you need to start investing in real estate.

And if a duplex feels like just the start, the same playbook scales to small multifamily investing with 2 to 4 units.