The average American home has ballooned over the years, growing in the Northeast from an average of around 1,600 square feet in 1973 to more than 2,600 square feet in 2010, according to the U.S. Census Bureau.

But these days, small houses are in the spotlight. The tiny house movement, centered on mostly mobile spaces that are smaller than 400 square feet, is sweeping the country (see sidebar) and HGTV reality show “Tiny House Hunters” follows people looking to downsize.

We’ve rounded up several homes for sale in Nassau and Suffolk counties that are about 1,000 square feet or less — tiny by Long Island standards — and asked the sellers about the advantages that come with living small.

FREEPORT

Price: $319,999

Size: 1,000 square feet

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Property taxes: $9,212 ($7,839 with STAR exemption)

Seller Mike Bruscino, 60, and his wife, real estate agent Frances Bruscino, 58, raised their now-33-year-old son in the house, and he says the smaller space created more opportunities for family time. “We’d sit together on the couch in the evening to watch a show,” Mike Bruscino says. “The family that lives close stays close.”

Other: The three-bedroom, one-bathroom ranch is on a 50-by-100-foot lot. There are hardwood floors throughout, a kitchen with granite countertops and a whole-house water filter. The property has a detached 1 1⁄2-car garage.

Listing agent: Frances Bruscino, Century 21 American Homes, 516-302-8500

This 1,000-square-foot Nesconset home is listed for $305,000 in April 2016. Photo Credit: Daniel Gale Sotheby’s International Realty

PORT WASHINGTON

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Price: $749,000

Size: 984 square feet

Property taxes: $6,310 ($5,344 with STAR exemption)

Matthew Straus, 44, says the small space has meant his kids, ages 5 and 7, haven’t accumulated tons of toys they never play with. “My wife bought angled shelves and we put the toys in that,” he says. “When that fills up, that’s it. No more toys.”

Other: The two-bedroom, one-bathroom Colonial on a 50-by-50-foot lot has a deep porch with views of Manhasset Bay.

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Listing agents: Andrew Wu and Susan Cacioppo, Daniel Gale Sotheby’s International Realty, 516-883-2900

BALDWIN

Price: $289,000

Size: 868 square feet

Property taxes: $6,462 ($5,908 with STAR exemption)

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Seller Kenneth Petrocca, 43, says he appreciates the fact that any maintenance is easier to tackle in a smaller home. “It’s one can of paint, a smaller amount of materials,” he says.

Other: This bungalow-style, two-bedroom home on a 40-by-100-foot lot comes with a mudroom. The kitchen has stainless steel appliances, and the bathroom has a Jacuzzi tub. The property has a detached garage with an attic.

Listing agent: Davorka Bender and Eva Boci, Sailing Home Realty Corp., 516-377-4760

NORTH BELLMORE

Price: $315,000

Size: 925 square feet

Property taxes: $10,285 ($8,885 with STAR exemption)

Audrey Carroll, 66, grew up in the home at a time when small houses were the rule rather than the exception. “You were always outside, no matter what the temperature was,” she recalls. “You still had one television per household.”

Other: This two-bedroom, one-bathroom ranch has a living room with a wood-burning fireplace, plus a full basement and garage. It sits on a 40-by-100-foot lot.

Listing agent: Laura Fais, Douglas Elliman Real Estate, 516-795-3456

AQUEBOGUE

Price: $359,000

Size: 1,000 square feet

Property taxes: $5,841

Cecily Jaffe bought the house 17 years ago when her daughter was in high school. She now lives alone. “It’s plenty of space for me,” says Jaffe, 69. “I didn’t think I needed a really big house.”

Other: This two-bedroom, 1 1⁄2-bathroom cottage is down the street from Peconic Bay. The living room comes with a fireplace, and the master bedroom has a sitting area.

Listing agent: Rose McKillop, Andrew Stype Realty, 631-298-8760

CENTER MORICHES

Price: $599,900

Size: 1,070 square feet

Property taxes: $12,470

Janet White, 77, and her husband, Peter, 74, use the house as an escape from the small apartment they rent in Manhattan’s West Village. They end up enjoying the outdoors much more, Janet White says.

Other: This cape has two bedrooms and two full bathrooms. It sits on Senix Creek off Moriches Bay, and the property with a bulkhead comes with a boat ramp and floating dock. The living and dining rooms have vaulted ceilings, and there’s a gas fireplace. The 50-by-308-foot lot comes with a two-car garage.

Listing agents: John W. Liberti and John Liberti, Douglas Elliman Real Estate, 631-758-2552

NESCONSET

Price: $305,000

Size: 1,000 square feet

Property taxes: $6,571 ($5,610 with STAR exemption)

Andrew Luberto, 38, who has lived in the home with his wife, Katherine, for more than five years, says he has prioritized his possessions, getting rid of items such as old college textbooks. “It’s amazing how much you can downsize,” Luberto says. “You think, ‘Am I really going to read about the Russian Revolution again?’ ”

Other: This ranch home with a long front porch fits three bedrooms and two full bathrooms in 1,000 square feet. It has wide-plank pine floors, and the updated kitchen has butcher block countertops.

Listing agent: Kevin Guthrie, Daniel Gale Sotheby’s International Realty, 631-427-6600

OAKDALE

Price: $249,900

Size: 700 square feet

Property taxes: $7,255 ($6,161 with STAR exemption)

Rhoda and James McManus, both 80, bought the home, part of an artists’ colony on the former Vanderbilt estate, in 1965 and have rented it out. The home has a loft-like upstairs bedroom that’s the size of the entire house.

Other: The home was built circa 1895 and sits on a 25-by-75-foot lot. The property has a large deck.

Listing agents: Joanne Sturchio and Norm Marcioch, Douglas Elliman Real Estate, 631-589-8500