One Day You’ve Been Gentrified . . .

. . . then they move in the homeless shelter. Buried lede — at $2700 a month, developers everywhere should be volunteering to convert their bad investments into shelters:

City officials said the condos — which couldn’t attract buyers in the fizzled housing market — are part of an effort to help an “unprecedented” number of homeless families who have ended up on the street because of the tough economy.

Units priced at $350,000

It appears to be the first time a faltering upscale building has found a new purpose as a shelter, said Steven Spinola, president of the Real Estate Board of New York.

Neighbors were furious the 67-unit building on East New York Ave., where apartments were supposed to sell for $250,000 to $350,000, has been turned into a shelter.

“I’m a hardworking taxpayer, and I don’t think homeless people should be living better than me,” fumed Desmond John, 35, a window salesman who wanted to rent one of the fancy apartments. “They said it’s not for rent. It’s a shelter. I was shocked.”

Luxury brokerage firm HQ Marketing Partners started promoting the condos last summer — with the hook that buyers could custom design the units.

When the market started to tank in the fall — and his gamble on a fringe neighborhood didn’t pay off — developer Avi Shriki said he had to come up with a Plan B.

“When the market went south, we knew we had to do something different,” said Shriki, 44. “With the market being the way it is you have to be creative.”

This spring, Shriki signed a 10-year contract with the Bushwick Economic Development Group to turn the building into a homeless shelter.

Shriki wouldn’t say how much he gets paid — but he said he jumped at the chance to get people in his building.

“At least we still own the building and we are paying our mortgage, so that’s good,” said Shriki. “The outcome is not as bad as some people I know who had to surrender the whole building to the bank.”

City pays $90 a night

The city is paying Bushwick Economic Development Corp. $90 a night for each of the apartments, about $2,700 a month — a figure that also covers social services, housing help and job counseling designed to get families back on their feet.

The developers in similiarly overbuilt Long Island City should take notice — some of these rentals are way under $2700 . . .