Most young adults can’t wait to fly the coop. However, more are moving back in with their parents and, in some cases, even grandparents, due to the affordability crisis sweeping the U.S.
For landlords, offering enough space for multiple generations of a family to live together and contribute to housing costs while being around loved ones they have known all their lives presents a win-win for all concerned.
Most people think of multigenerational households (defined by Pew Research as “two or more adult generations with adults mainly ages 25 or older”) as owner-occupied residences. However, with the cost of housing putting homebuying out of reach for many working Americans who also have to look after older parents and younger children (nearly 25% of all Americans are the so-called “sandwich generation”), a multigenerational rental makes sense and can be relatively simple to create.
For landlords, buying a larger single-family or small multifamily home that generates more rental income when utilized for multigenerational purposes is a simpler process than stacking up multiple three-bedroom ranch homes and vetting new tenants.
“As all generations come under one roof, it’s driven by a mix of factors, including cost savings, housing affordability, and caregiving needs for both elder care and childcare,” Jessica Lautz, the National Association of Realtors’ deputy chief economist, told Inman.
The Math Behind the Movement
While many renters might crave solo living, the reality is that it is just too expensive. The median U.S. home price is just below $440,000, and with mortgage rates around 6.2%, first-time homebuyers accounted for just 21% of all purchases in 2025.
For renters paying $1,800 a month, the prospect of paying rent and saving for a home is much more difficult than it was even a few years ago, making multigenerational living far more popular than it was then.
Realtor.com‘s latest multigenerational report finds that in 2024, 4.5% of owner-occupied households—nearly 4 million homes—contained three or more generations, up from 4.3% in 2019 and 2014. The typical multigenerational household now has five people sharing a four-bedroom home and a combined median income of $131,000, allowing greater spending power and an inbuilt network of childcare help.
For landlords, the goal is clear: provide well-laid-out, comfortable accommodation, and capitalize on this growing market.
How Small Landlords Can Attract Multigenerational Households
Look for existing opportunities
For small landlords actively in the market for rentals, searching listings featuring the terms “guest house,” in-law suite,” “ADU,” or “granny flat” will offer an existing space ready to accommodate additional family members.
According to the Realtor.com report, those terms comprised about 6.1% of active 2025 listings and carried a median list price of $709,000, about 65% higher than the $429,900 median for standard homes. This equates to $262 per square foot, compared to $215 for standard homes. The report stated that multigen listings received 13.5% more page views than standard homes.
The stats show that in pricier markets such as California, the price difference between multigenerational and standard homes is smaller (only 1.6% in Los Angeles), and many remodeled homes feature layouts that accommodate multiple family members.
Create opportunities
Adopting your current rental to cater to multigenerational tenants could be as simple as converting an attic, basement, or garage, or, depending on your budget, adding a separate ADU with its own bathroom.
Buy a large home
Whether you’re buying a rambling Victorian or a discounted McMansion, the idea of owning a large, appreciating rental that is maximizing its income potential and slashing the mortgage in the process is a great wealth-building move. If you’re looking to retrofit this for multiple family members, adding extra bathroom facilities is prudent, especially in an older home.
Buy a small multifamily
A two-to-four-family home is ideal for multigenerational housing because it gives different elements of the family their own space, bathrooms, and kitchens while still being in close proximity to one another. As a landlord, your advertising will need to reflect your intent; otherwise, you will simply attract standard, unrelated renters to fill the apartments.
Be part of the multigenerational household, filling it with your own family members
If you are a part of the multigenerational family equation, not only will you have the luxury of living with family members, but you will also be able to qualify for an FHA loan with a 3.5% down payment.
If you want to use this as a vehicle to build wealth, rinse and repeat the process every year or two (while refinancing the lived-in property into a standard mortgage) to build a portfolio.
Alternatively, living in a multigenerational household as an owner-occupant for at least two of the five years will allow you to sell without incurring capital gains tax under the existing limits ($250K if single and $500K for married couples). But remember that building wealth through this method is dependent on your family members paying their rent on time!
Homebuilders Are Acclimating to the Multigenerational Model
Newer homes are being designed for multigenerational living. That’s the conclusion drawn from Redfin and Thumbtack after analyzing dozens of home designs for their 2026 Home Design Trend Predictions.
With multigenerational households quadrupling since the 1970s, it makes sense for prospective landlords to finally come to grips with the cash flow conundrum that has upended investing since the Federal Reserve hiked interest rates following the pandemic.
Builders are not simply theorizing here. According to Zillow’s end-of-year Zeitgeist Report, top search criteria in Connecticut, Idaho, New Jersey, New York, Oregon, Utah, and Washington were “ADUs, casitas, duplexes, guest houses, in-law suites, and mother-daughter homes,” revealing the demand for housing that can accommodate more than just a traditional family setup.
How Multigenerational Housing Helps Landlords Cash Flow
Assuming that a landlord owns an existing property that covers the mortgage, property taxes, and insurance, here’s how the addition of an ADU would impact cash flow in different markets.
Los Angeles (high-cost market)
According to a detailed 2025 ADU investment guide for Los Angeles:
- Construction cost: $90,000-$400,000, depending on type
- Prefab/modular: $150-$250/sq ft
- Custom build: $250-$400/sq ft
- Garage conversion: $100-$200/sq ft (lowest barrier to entry)
- Monthly rental income by submarket:
- Premium areas (West Hollywood, Santa Monica): $3,500-$4,000/month
- High-demand areas (Hollywood, Pasadena): $2,800-$3,500/month
- Emerging markets (San Fernando Valley, East LA): $2,000-$2,800/month
- Annual ROI: 8% to 15% overall; 10% to 14% near UCLA/USC
Here are three concrete break-even scenarios:
Scenario Build Cost Monthly Rent Annual Net Break-Even
Budget prefab ADU $150,000 $2,800/mo $33,600/yr 4.5 years
Mid-range custom $250,000 $3,200/mo $38,400/yr 6.5 years
Premium custom $350,000 $3,800/mo $45,600/yr 7.7 years
For any landlord underwriting a deal in the LA basin, those are the rent figures to plug into a pro forma when a garage conversion or backyard ADU is on the table.
Florida (budget modular market)
For investors in lower-cost markets, a modular ADU analysis covering Florida shows that a budget modular ADU at $129,000 generates $1,800/month in rent.
- Annual ROI: 13.4%
- Payback period: 7.5 years
ADU-equipped homes sell at a 35% resale premium over comparable properties without one.
Final Thoughts
The national average apartment rent as of May 2026 is $1,642/month, according to Apartments.com. Even a modest ADU renting at this national average delivers meaningful additional income on top of whatever the main home generates.
In California, the state average is $2,638/month. An ADU in any California market thus starts above the national baseline before you’ve chosen a single finish.
Critically, lenders now recognize this: 75% of estimated ADU rental income can be counted as qualifying income when underwriting a mortgage, according to a Yahoo! Finance report on Fannie Mae guidelines. This means the ADU doesn’t just improve cash flow after purchase—it can help you qualify for the loan in the first place.
An ADU is just one example of how landlords can accommodate more people in their rentals, and it’s probably the most practical in areas without an abundance of small multifamily housing or large single-family homes.
Importantly, according to Pew Research, renting to members of a multigenerational family means far greater financial stability and cohesion than renting to multiple individual roommates. In short, there is a lower chance of having to evict tenants for nonpayment of rent.
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