Third time’s the charm?

Mayor Bill de Blasio launched his third major effort in four years to stem the city’s homelessness crisis Tuesday, announcing plans to spend $100 million a year on friendlier shelters to bring New York’s most desperate in the streets and subways.

“This is all about reaching people and connecting with them deeply,” de Blasio said in announcing the plan at a church near Washington Square Park. “It has not happened on the scale it needs to.”

De Blasio promised his latest plan will end homelessness on the streets and in the subways underneath within five years, but officials acknowledged that key details are still being hammered out.

New York City estimates 3,600 people currently sleep outdoors at night across the five boroughs — half of whom are chronically homeless, while the rest are transient.

Hizzoner’s latest plan calls for getting those 1,800 New Yorkers off the streets by enticing them with new beds in ‘safe haven’ shelters, which offer more privacy and fewer rules than the usual dormitory set-up in the city’s much-maligned shelter system.

People in the ‘safe haven’ buildings get individual units to sleep, unlike the typical dormitory setup found in larger city shelters. And they ditch usual requirements like curfew in a bid to keep the hardened homeless in the system and receiving services — all in an effort to help them transition back to a more stable style of living.

De Blasio said Tuesday the city plans to add another 1,000 beds for ‘safe haven’ beds for the chronically homeless to its current total of 1,800. However, officials said Tuesday morning they only had 350 of those new units in the works.

Hizzoner and Cardinal Timothy Dolan announced later that Catholic Charities would commit five buildings towards the effort, but City Hall could not provide a total for the number of beds that would yield.

Additionally, City Hall says it will find 1,000 apartments to provide permanent housing for street homeless, though officials admitted they have yet to locate the units for the initiative.

The city’s struggles to find housing for homeless New Yorkers led it to establish an initiative that helps those with steady incomes relocate to more affordable neighborhoods, or even leave the city for cheaper rents. Newark, Jersey City and other towns across the Hudson River have sued New York City in federal court to shut the program down.

It’s the third major housing initiative de Blasio’s administration has announced in the last four years as it’s struggled to get a handle New York’s decade-old homelessness crisis.

All told, almost 60,000 New Yorkers — 59,997 — are calling the city’s traditional shelters home during the December holiday season, though that’s down slightly from the 60,924 during the same time period in 2018 and 60,593 in 2017.

City Hall announced in 2015 it would use its massive program to keep apartments in rent regulation to set aside 15,000 units for homeless New Yorkers over the next fifteen years.

In 2017, de Blasio announced plans to build 90 new shelters in neighborhoods around the city to keep homeless New Yorkers closer to jobs and families.

Just 30 of those shelters have been opened, while 30 are still in the planning or construction stages — and face potential legal challenges and neighborhood protests. The remaining one-third still haven’t left the drawing board.

But de Blasio responded peevishly when pressed about why this new proposal would finally turn the tide.

“I think that fact that we have as many Safe Haven beds as we have now affirms this can be done. The fact that 2,450 people are off the streets affirms it,” de Blasio tartly responded. “You either want to believe that we can solve the problem or you don’t.”

He added: “So this is what I say to all the Doubting Thomases, you could keep doing what we we’ve done for years and years and years and if somehow that satisfies you, God bless you.”