What size home do you actually need? Here is a buyer's guide.

Key takeaways

• The Homes.com New Construction Builder Survey found that 74% of respondents said a home office was an important feature in a newly constructed home and 18% chose their home because it could accommodate a multigenerational household.
• Right approach is not to target a square footage number but to list every person who will live in the home and every activity that needs its own dedicated space.
• Buyers who anticipate multigenerational living should prioritize a main-floor bedroom and full bathroom for aging parents.

The ideal newly built home has evolved beyond a simple bedroom-and-bathroom count. Today's buyers want flexible spaces that can adapt as their lives change, according to a new survey.
Many say their dream home would include four bedrooms, four-and-a-half bathrooms, one or even two home offices, and extra space that can serve as a playroom now and potentially accommodate an aging parent in the future.

At the same time, buyers are not necessarily looking for bigger houses. A June Homes.com New Construction Builder Survey of 3,000 recent and prospective homebuyers found the largest share prefer homes between 2,500 and 2,999 square feet, while interest in homes larger than 3,000 square feet has softened compared with a few years ago.

Related content:

• Download the report
• See the full methodology
• The 4-2-1 rule: What new-home buyers really want for square footage

Striking that balance often means weighing how much room different stages of life require. Should a family dedicate space to a home office or a guest room? Is a small bedroom sufficient for young children, or should buyers plan for future needs? How much outdoor space is enough?
For many buyers, those decisions reflect a broader shift away from purchasing a starter home and toward finding a house that can accommodate changing lifestyles for years, if not decades. The process begins with self-examination.

"I walk buyers through a simple exercise: List every person who'll regularly sleep in the home, then list every activity that needs its own space — remote work, hobby space, guest stays — and size to that, not to a target number like '2,500 square feet,'" said Matthew Scarborough, associate broker at Scarborough Realty Group, an affiliate of Keller Williams in Santa Fe, New Mexico.

Families often make the mistake of overestimating or underestimating their space needs. People who buy too much house are wasting their money on rooms they don't use. People who buy too little house wind up frustrated because their needs are not being met.

Doug Maxwell, an architect who is the managing partner of Upstate Modernist in Rhinebeck, New York, said some people focus more on having a big house than on what the house needs to do. One client, who built a 10,000-square-foot home with multiple bedrooms and entertainment space "definitely overbuilt and over-conceptualized the eating and sleeping space they needed," Maxwell said.

Another common mistake when it comes to size is parents overbuilding for children by constructing a pool, a playground and other space-hogging amenities "that push their kids to do sports," Maxwell said.

In the past, architects in general designed homes around the concept that every person would need about 400 to 600 square feet. While designing homes today is more nuanced than that, experts say it is a good idea to know the general square footage of an average room.

For instance, a master bedroom should provide enough space for a king-size bed, wardrobes and a seating area. This should require between 130 square feet and 215 square feet. A children’s bedroom ideally will accommodate playing, learning and studying. It should measure between 160 square feet and 215 square feet.

And a comfortable bathroom will have between 85 square feet and 110 square feet. This amount of space will accommodate a bathtub-shower, toilet and sink. A guest bathroom can be more compact, between 20 square feet and 45 square feet for a toilet and a small sink.

Experts say buyers should ask themselves the following questions when examining their current space:

• Which rooms do I use every day?
• Which rooms sit empty?
• Do I have enough storage?
• Which spaces tend to get cluttered?
• Do family members have to wait for the bathroom?

Buyers also should think about the people who would live in the house immediately and in the future:

• How many children will we have?
• What will we do when they move out?
• Do I want to age-in-place here?
• Will an aging parent move in?
• Will grown children return?

"What is a day in a life of desired experience in the home?" Maxwell said. "Imagining that from the onset is really helpful. Is it a lively place? Calm, serene place? Both of those can happen together, but what is the ideal experience? Thinking through that first helps us design the home."

Home size has fluctuated with the economy more than with any design trend, said Nathan Kipnis, the founder of Kipnis Architecture and NextHaus Alliance in Evanston, Illinois.

"In the early 1970s, amid the gas crisis and the inflation that followed, the average home was around 1,500 square feet — a number that's hard to imagine today," he said.

Size rose to about 2,200 square feet in the early 2000s and plateaued through the 2008 recession before peaking around 2,500 square feet between roughly 2015 and 2021, Kipnis said. It has since trended back down to about 2,150 square feet.

"Our own projects don't track that curve exactly, but they're trending in the same direction," he said. "I'd agree that homes were largest about a decade ago and have been getting modestly more compact since. A lot of that comes down to what people can actually afford — construction costs, land costs and interest rates. Some of it also reflects a mentality of maximizing a home's footprint on a given lot to try to get the best return on investment."

The biggest factor today is affordability. "People are generally stunned by what construction costs today," he said. "Combined with higher interest rates, that's significantly narrowed both how big a house can be and who can afford one at all."

New home construction is mirroring these affordability challenges, said Rose Quint, assistant vice president at the National Association of Home Builders in Washington, D.C.

In 2022, 43% of new homes had three bedrooms. The share rose to 47% in 2024 before falling back to 46% in 2025, Quint said. The share of homes with four bedrooms fell from 36% in 2022 to 32% in 2025, she said.

The shift is also apparent in the number of bathrooms, Quint said. In 2022, 62% of all new homes had two full baths compared to 64% in 2025, she said. The share of homes with three full baths fell from 26% in 2022 to 24% in 2025.

The survey found that 74% of respondents said a home office was an important feature, with 36% calling it the most important factor in choosing a home.

Remote work is no longer a temporary arrangement for millions of Americans. If your income depends on working from home, the office is not a luxury. It is a requirement and should be treated with the same priority as a bedroom or a kitchen. Pay attention to the infrastructure. You'll need:

• An ample number of electrical outlets to support a full desk setup without relying on power strips
• Strong Wi-Fi signal in the room
• Good overhead lighting and at least one window
• Between 100 and 150 square feet, which comfortably fits a desk, bookshelf, filing cabinet and guest chair

Consider how the room looks on camera if you take frequent video calls. A clean wall behind the desk, adequate lighting and enough depth to frame the shot properly all matter."If folks are commuting to local jobs one day and work from home the other, anticipating that change in lifestyle is good to accommodate," Maxwell said.

In the survey, 18% said they bought their new home because it could accommodate a multigenerational household.

There is a clear and consistent shift toward multigenerational living across all demographics and price points, said Michael Sobhi, a broker with Real Brokerage LLC in McLean, Virginia.

"This isn't a niche trend anymore," Sobhi said. "It's a fundamental shift in how families are thinking about the homes they buy, and the builders are listening."

If you expect one or both parents to move in within the next five to 10 years, the decisions you make now will determine whether that transition is manageable or requires a major renovation. More homebuyers are planning for not just their current but also their future needs, said Justin Murphy, an agent and the co-founder of MultiGen Living Group, a brokerage in Punta Gorda, Florida, dedicated exclusively to multigenerational homes.

Murphy purchased a newly constructed home in 2023 for his immediate family and for his elderly parents. He chose a model with an in-law suite that had a separate entrance while remaining attached to the home. The suite was one bedroom with one bathroom, a living space, a kitchenette and a space for a washer and dryer, he said.

His father eventually died a year and a half later. "That setup probably kept my dad alive another six months," he said. "It was the best year and a half we could have had."

Here's what to consider when planning a home for multiple generations:

Stairs become a barrier as people age. A second-floor bedroom that works for a 68-year-old may not work for a 78-year-old with a hip replacement. A main-floor suite with a bedroom, a full bathroom and ideally a small sitting area gives an aging parent both proximity to the family and a degree of independence. At minimum, the home should have one bedroom and a full bathroom on the ground level. A half-bathroom is not sufficient.

Check doorways and hallways. Standard interior doors are 30 inches wide, but a wheelchair or walker requires at least 32 inches. The Americans With Disabilities Act-recommended minimum is 36 inches. Widening a doorway after the fact involves reframing and drywall work. A home with wider openings saves that cost.

Evaluate the bathroom layout. A walk-in shower with a low or zero threshold is far more practical for someone with limited mobility than a tub with a high ledge. Grab bars can be added later, but the walls need blocking, which is plywood or solid wood installed behind the drywall to provide a secure anchor. Without blocking, grab bars may not hold under the full weight of a person.

Consider the entryway and lot. A home that requires climbing several steps to the front door may eventually need a ramp. A single-story entry or a home with only one or two steps is easier to modify. The path from the car to the door should be smooth and well lit.

Privacy matters on both sides. A layout that puts the parent's space near the family gathering area but not directly in the middle of it helps everyone maintain boundaries. A separate entrance, even a side door, adds flexibility.

According to a 2024 Pew Research Center analysis, roughly half of young adults ages 18 to 29 live with their parents, the highest share in modern history. The reasons range from student loan debt and high rents to a tight job market and the rising cost of living. Even if your children do not move back permanently, they may need a landing spot for six months to a year.

A returning adult child needs more than a bed. They need:

• A room with a door and access to a bathroom not shared with a parent in the next room
• A bedroom on a separate floor from the primary suite for privacy and noise separation
• A finished basement with an egress window and bathroom, a bonus room above a garage or a detached accessory dwelling unit if zoning allows

Parking is another practical consideration. A household that once had two cars may soon have three or four. A two-car garage with a wide driveway accommodates this. A narrow lot with only street parking will feel the strain. Shared spaces matter as well. A kitchen that handles multiple people cooking at different times, a laundry room accessible without walking through someone's bedroom and a living area with enough seating for the full household all reduce friction. These are not luxuries. They are the difference between an arrangement that works and one that creates daily tension.

More on this topic:

• Multigenerational homes for seniors: Pros, cons and why more families are choosing them
• How to age in place as a senior
• These empty nesters remodeled a family-focused theater room into a wellness escape