Four Seasons – Big Prices!

Take a good look at the glimmering new condo and hotel skyscraper in this rendering.

This 58-story spire, slated to take shape next to the Christian Science Plaza in the Back Bay, is one of a trio of new towers poised to bring New York condo prices to the Hub.

The new $700 million Christian Science tower, recently approved by Boston City Hall, will feature the Four Seasons brand, with 180 super-luxury condos on the top forty floors. Construction is expected to kick off next year, with a planned 2017 opening.

The new Millennium Tower in Downtown Crossing, now under construction, will hit 56 stories.

And Don Chiofaro’s proposed new harborside tower complex would top out at 55 stories, crowned by 120 multimillion-dollar units.

There’s talk of these new skyline-topping condos fetching $4,000 or even $5,000 a square foot.

That’s double or more what the most expensive condos are selling for right now in Boston, with a penthouse at the Mandarin Oriental holding the record after fetching more than $13 million a few years ago.

Double that number and you get an idea of what the future may hold for Boston’s already crazy condo market – penthouses overlooking vast stretches of Eastern Massachusetts selling for $25 million and up.

OK, let’s not get ahead of ourselves here.

Kevin Ahearn, chief executive of Otis & Ahearn, a top Boston luxury condo marketing and brokerage firm, says we will just have to wait and see how prices shake out.

Still, these super-luxury condos atop Boston’s bejeweled skyline will be in a league of their own.

“These new towers will offer five-star living and drop dead views,” Ahearn says. “It’s alpha luxury and it will create a new category.”

The new skyscrapers biggest draw, besides sheer luxury, will be their height. While 58-story towers are no big deal by New York standards, they are a very big deal in the Hub.

The tallest condo towers in Boston currently max out after 40 or so stories. Not bad, but still shrimps by Big Apple standards.