If you’re home shopping, you may be looking at duplexes. These properties are typically a single structure with two separate units. At face value, buying a duplex might seem like a BOGO (buy one, get one free) deal, but it isn’t as simple as purchasing two homes for the price of one.
It’s important to analyze the pros and cons of buying a duplex before you start bidding or sign a contract. In this guide, you’ll learn about the following topics:
Table of Contents
Key Points
• Assessing financial concerns and creating a budget is crucial before purchasing a duplex.
• Researching the real estate market will help a buyer understand duplex pricing and availability.
• Thorough property inspections are necessary to identify any required repairs or renovations.
• Evaluating potential rental income is important to find a leasing scenario that can offset mortgage costs.
• Understanding legal and zoning requirements is essential for anyone considering duplex ownership.
Defining “Duplex”
A duplex is composed of two living units on top of each other or side by side. Duplexes have separate entrances for each occupant. Every duplex has one thing in common: a shared wall or floor. If the duplex units are side by side, the occupants will share a wall. One on top of the other? Occupants share a ceiling/floor.
Beyond that, there are slight variations in the type of structure that would be considered a duplex.
Types of Duplexes
For a side-by-side duplex, both entrances are likely on the street. If a duplex is stacked, the second-floor occupant might share an exterior entrance with the first-floor occupant, and then have an entrance to themselves upstairs. Single-family homes that have been subdivided typically do not count as duplexes, however.
In addition to private entrances, the units have their own bathrooms, kitchens, and other living features. In terms of the exterior, occupants may share a backyard, garden, or driveway.
Duplex vs Twin Home vs ADU
Just because properties share a wall doesn’t inherently make them a duplex. Sometimes duplexes are confused with twin homes.
A twin home may look like a duplex, but the shared wall is in reality the lot line between the two homes. So it’s two connected properties, each on its own lot. A duplex is two properties, owned by the same person, on a single lot.
The square footage of each duplex half is typically similar to the other. In many, occupants will find that the layouts mirror each other (if they’re side by side), or duplicate exactly (if they’re on top of each other).
Properties with carriage houses or guesthouses are not considered duplexes: They usually do not share walls, and the smaller residence is considered an accessory dwelling unit or ADU.
Duplexes fall in the category of multifamily dwellings, which also includes triplexes and quads (aka fourplexes). According to the National Multifamily Housing Council, more than 17 million renters (about 17% of all renters) live in two- or four-unit dwellings.
The appeal of multi-family structures, including duplexes, has increased in recent years, with mortgages becoming more easily available and with down payments as low as 5%.
First-time homebuyers can
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Benefits of a Duplex
Duplexes have the exciting “two for one” energy, which can make buying them enticing. The style of living comes with benefits for the buyer, including:
• Income to help with mortgage. Duplex owners who decide to live in one of the units can rent out the other as either a long-term or short-term rental, making income to help offset the monthly mortgage payments and upkeep.
• Potential tax benefits. Mortgage interest is tax-deductible for a primary or secondary home for the first $750,000 or less of debt ($375,000 for a married couple filing separately). So resident duplex owners — who sometimes call themselves “house hackers” — can write off mortgage interest and property tax only on the half of the property they live in. However, if they have a renter, they can write off repairs to that unit, any utility bills paid for the rental, and management fees. The IRS even allows the owner to depreciate the rented half of the property.
• Flexibility in the future. Having two homes on one lot opens up options for owners. They can rent out a unit or use it as an office or studio space. In the future, the unit could become an apartment for aging parents or a guest suite for visiting family members.
• Landlord proximity. If a duplex owner is getting into the landlord business for the first time, it might be beneficial to live close to the tenant. In the event of a repair or emergency, the tenant is just steps away.
Additionally, because of landlord proximity, duplex owners might find that renters keep the home in better condition. If the landlord is living on the property, a tenant might be less likely to abuse features or leave problems unreported.
A duplex could also be a good opportunity to live next to a family member or close friend. It means both parties live on the same property but not with each other. For some arrangements, it’s a good balance between living together while also apart.
• Affordability. If you’re wondering how much duplexes cost, know this: A duplex by definition is two properties with a single price, and can be more affordable than two single-family homes. The appeal of multi-family structures has increased in recent years as mortgages have become more easily available, and down payments can be as low as 5%.
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Is a Duplex a Good Investment?
If you’re considering purchasing a duplex purely as an investment, whether or not it’s a good idea will depend on your costs — including mortgage payments, taxes, maintenance and more — and the potential rental income from the property (either with a long-term tenant or as a short-term rental). Make sure that when you weigh the numbers you factor in a period when the unit will be vacant, as most units aren’t rented 100% of the time. The average vacancy rate is 7%. Also consider the potential for the property to appreciate in your chosen market.
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Drawbacks of a Duplex
Given the long list of advantages of duplexes listed above, you might think the answer to “are duplexes a good investment?” is a resounding yes. But double the property doesn’t always mean double the fun. Here’s why a duplex might not be the right fit for all buyers:
• Affordability. Duplexes may be located in more affordable neighborhoods, and two properties in one sounds like a deal — but always crunch the numbers to ensure the duplex price isn’t higher than that of a single-family home nearby.
• Acquisition costs. If a duplex buyer does not plan to occupy the property, the down payment will typically be at least 15% of the purchase price.
• Insurance. Multifamily homeowners coverage, known as landlord insurance, will usually be more expensive (often as much as 25% more) for an investment property. This can be a key concern when thinking about how to buy a duplex.
• Tax season could be complicated. Yes, a homeowner can offset costs with a tenant in a duplex, but they’ve just signed themselves up for a more complicated tax scenario than with an owner-occupied single-family home.
• Landlord responsibilities. Many homebuyers are drawn to the idea of a duplex because they can generate income while living there. However, being a landlord isn’t just about collecting rent checks each month. Duplex owners are responsible for their renter’s unit, meaning fixing issues and being available for general repairs.
No one wants to address an overflowing toilet at 2 am, but as a landlord, that might well be a reality. It’s a 24/7 job, and not only will a duplex owner be responsible for fixing the issues, but the cost of repairs will have to come out of their pocket.
• Finding good tenants. Finding renters can be challenging. Owning a duplex doesn’t automatically guarantee extra income, and the process of finding reliable renters can be time-consuming. Plus, duplex owners will have to start the process anew each time a tenant moves out.
Remember, if the second dwelling is unoccupied, the duplex owner still owes the same amount each month. Before buying a duplex, it’s worth considering how much time owners can put into searching for the right tenant, and if they want to have that responsibility long term.
• Bad tenants. Let’s face it, not all tenants will be perfect. In reality, they could be loud, rude, messy, and/or late on rent. There are a multitude of things that could go wrong with a renter, and duplex owners should be comfortable bringing issues to the table. Owners who decide to live onsite could get stuck with a less-than-considerate neighbor.
So is a duplex a good investment? The answer will be different for every homebuyer, so weigh the pros and cons carefully and consider your personal habits and preferences as you make your decision.
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Estimate a Mortgage Payment for a Duplex
Now that you know about the pros and cons of owning a duplex, if you’re still interested in the idea of purchasing one, use the mortgage calculator below to get an estimate of what the mortgage for duplex properties would cost each month.
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Mortgage for a Duplex: Loan Options Explained
If, now that you know the pros, the cons, and the costs, you are still ready to move ahead, the next step in how to buy a duplex would be financing your purchase. Knowing whether you plan to live at the address or rent out both units is a big consideration.
Owner-Occupied Financing
A potential duplex buyer can apply for a Fannie Mae loan with 5% down if the applicant plans to live in the multifamily home.
Other options for a buyer who plans to occupy one of the units is a 2-, 3-, and 4-unit (multifamily) home FHA loan, a VA loan, or conventional financing. FHA loans can be a good choice for first-time homebuyers and anyone with less-than-perfect credit.
Check out our first-time homebuyer guide for additional information on mortgages, loans, and closing costs.
Using Rental Income to Qualify
Applicants may be able to use projected rental income to qualify for a loan. For rental income to be taken into account, though, renters usually must have already signed a lease. And not all of the projected income applies; a percentage is usually subtracted to account for maintenance and vacancies.
It makes sense for would-be buyers to have a good feel for their budget, as well as the potential costs associated with buying a property.
Investors sometimes need a higher down payment than owner-occupants do.
Investment Property Financing
Investors — buyers who don’t intend to live in the home — are limited to conventional mortgage loans. Investing in duplexes can allow a purchaser to scale up their rental business more quickly than when buying single family homes, as you can often purchase a duplex and get two units for less than the cost of buying two single-family properties.
Investment property mortgage rates are typically higher than those for owner-occupied properties. Interest rates may be anywhere from .50% to 1.00% greater. This reflects the fact that loaning to someone who doesn’t live in a property is inherently more risky. If money is tight, an owner-occupant might prioritize payments on their residence, whereas an investor may be at higher risk of default.
There are ways to buy a multifamily property with no money down so investigate those options if your savings for a down payment are limited.
The Takeaway
Buying a duplex can be a great opportunity to own two properties, perhaps occupying one and earning rental income on the other. But there are pros and cons to when investing in duplexes, as well as implications for your finances. Consider these carefully before you commit, and look for a mortgage rate and loan terms that fit your budget, seeking out quotes from multiple lenders to find the right fit.
Looking for an affordable option for a home mortgage loan? SoFi can help: We offer low down payments (as little as 3% - 5%*) with our competitive and flexible home mortgage loans. Plus, applying is extra convenient: It's online, with access to one-on-one help.
FAQ
Can you buy a duplex with no money down?
It may be possible to purchase a duplex without a down payment, especially if you plan to live in the property. Many states have down payment assistance programs that offer funding to qualified homebuyers who purchase duplexes and live in one of the units. Another option is to seek out a cobuyer who would front the down payment in exchange for a percentage of rent generated by your tenant. Another option would be to seek financing from the building seller in a no-down-payment arrangement.
What credit score do you need to buy a duplex?
The credit score needed to qualify for a loan needed to purchase a duplex will depend on the type of mortgage you are seeking. Applicants for an FHA loan may qualify with a credit score as low as 500 if they put down 10%, for example. For a loan not backed by the government, you’ll likely need a credit score of at least 620, though some lenders will accept 600, while others may have higher numbers in mind for duplex properties.
How do you find good tenants for a duplex?
To find a good tenant for a rental property, use a standard application to ensure you capture all the necessary information about the prospective tenant. Make sure you have thought for and screen for important qualities: If you want a pet-free, non-smoking quiet type, you have to ask about those qualities. You may also want to run a credit and background check. There is a fee for this, but it could be worth it to help ensure you get a trustworthy tenant who will pay their bills on time.
What are the tax benefits of buying a duplex?
The tax benefits of owning a duplex depend on whether or not you live in one of the units. If one unit is your home, you may be able to deduct some or all of your mortgage interest, proportionate to the amount of the property you inhabit. But the business side of your rental, where your tenant lives, will have tax consequences, too. A tax professional can talk you through what costs associated with the rental unit may be deducted from your profits.
What is the conforming loan limit for a duplex?
The maximum amount for a conforming loan for a duplex in most U.S. counties in 2026 is $1,066,250. In higher-priced markets, the limit may go as high as $1,599,375.
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