No, they didn’t spend $2 million renovating a house just for their dog — despite what many may think.

Howard and Suze Rubin are listing their midcentury-modern Pound Ridge retreat for $2.9 million — and pushing back on a viral narrative that they poured a cool $2 million into the property solely for Buster, their 9-year-old bearded collie.

“We didn’t spend $2 million renovating the house for the dog,” Howard Rubin told The Post.

He said the renovation bill covered a sweeping overhaul of the property — from major mechanical systems and appliances to internet infrastructure and an additional garage that cost a few hundred thousand dollars on its own.

Headlines regarding their listing even prompted angry messages from people criticizing the couple for supposedly spending millions on their dog while others were struggling.

But listing agent Sally Slater of Douglas Elliman, who has worked with the Rubins for more than 25 years, said the upgrades have to do with Rubin’s own personal nature.

“He’s so meticulous in his whole thinking,” Slater told The Post.

The property has 16 cameras monitoring the house and grounds, two full-size house generators in case one fails and two separate internet feeds. Rubin even installed a termite protection system despite an inspection finding no termite problem.

Rubin, a professor emeritus of computer science at Hunter College and founder and CEO of technology research and advisory firm Rubin Worldwide, has a simple explanation: “I just like things to work.”

Buster still got plenty of perks when the couple renovated the spread.

The four-bedroom, 3½-bath home, spanning 4,442 square feet on 2.76 acres, is fully fenced to keep Buster safely separated from deer and coyotes, with pet-friendly turf and plenty of shade.

Because Buster likes the water but isn’t much of a swimmer, the couple reworked the pool with a shallow sun shelf where he can splash around.

Indoors, there are nine TVs throughout, and Rubin said Buster likes to plop down in front of one to watch his favorite show, “Paw Patrol,” until he falls asleep.

The home’s floor-to-ceiling windows even let him lie on the floor and keep tabs on the deer outside.

The Rubins bought this residence in 2019 for $1.82 million after finding Florida summers too hot, initially envisioning it as both their own getaway and a pet-friendly rental. COVID shelved the rental plan.

But building a life around animals was nothing new for the couple.

Rubin grew up in The Bronx and Suze in Queens, and over their 56-year marriage they have kept everything from dogs and cats to rabbits, hamsters and horses. Suze worked as a veterinary technician and an EMT.

When their son started riding at age 6, the family bought Peas and Carrots, a small stable in South Salem, NY. Slater helped them buy and later sell the property.

Rubin said members of the 1996 Olympic team trained there and “Superman” actor Christopher Reeve was among its clients.

Now 9, Buster has developed arthritis, one reason the Rubins have decided to sell.

The couple plans to consolidate at their one-story Florida home, where Buster won’t have to contend with hills, stairs, snow or ice.

“He’s part of the family,” Rubin said.

The home, which hit the market last Wednesday, is already drawing interest — including at least one prospective buyer who brought along her own four-legged companion.

“One couple came — she had a dog in her pocketbook,” Slater said.