Alexander McQueen is moving from the Meatpacking District to Madison Avenue.

Sources say the designer’s digs will encompass roughly 3,300 square feet at 747 Madison Ave. in a newly created double-height storefront.

The Escada store was temporarily located in the north corner of the space, formerly occupied by designer Valentino, while its new 717 Fifth Ave. store was being constructed.

To create the double-height ceilings for the Valentino store, the apartment above was purchased and knocked out, but the southern half of the shop was still single height.

Last year, retail deal maestro Jeff Sutton and partners SL Green Realty Corp. purchased the entire Valentino retail co-op for $66.25 million. In June, we wrote they bought the second-floor unit on the southern end of the building for $2.6 million, making a total $68.85 million investment.

The second floor of this duplex apartment will be incorporated into the ground floor to carve out more high ceilings for the Alexander McQueen store, while a third floor space will remain an apartment.

Sources said the designer will pay the princely sum of roughly $1,300 a foot over the life of the 15-year lease, or about $65 million.

The exit of Alexander McQueen from the Meatpacking area follows a similar move by Stella McCartney from 414 W. 14th to what she called “grown-up” SoHo at 112 Greene St.

Retailers in MePa complain that the droves of High Line Park visitors are nothing like the 6-inch, well-heeled fashionistas who used to make the taxi trek to Jeffrey.

Alice + Olivia is now open in the former Stella McCartney store, while retailers like Lululemon and Patagonia have joined the 14th Street lineup that includes Apple and Levi’s.

Susan Kurland of CBRE represented Alexander McQueen, while Sutton’s New York City Prime handled the building on Madison Avenue. Sutton and a rep for McQueen did not return calls for comment.

Kurland declined to confirm or discuss a possible deal but observed that between the nightlife, shops, offices and High Line, the Meatpacking area is attracting an international crowd and “a mixed bag where you have every demographic.”

“Madison Avenue,” Kurland purred, “is luxury.”

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Reinforcing the strong and desirable SoHo retail market, retail dealmaker Jeff Sutton and Joseph Sitt have teamed up to buy out a partner in 560 Broadway on the corner of Prince Street where a Newmark group retains control.

Both Sitt and Sutton will certainly add their retail expertise to the base of the small office building on one of SoHo’s prime corners, where Converse and Dean & DeLuca are the major retailers.

Sources said Sitt was approached by Newmark’s Barry Gosin to take over the stake and Sitt, in turn, brought in Sutton to seal a quick deal.

Sutton already controls 599 Broadway at the corner of Houston Street where American Eagle is located, and 529 Broadway at the corner of Spring Street where he, Sitt, Aurora Capital and the Adjmi family are developing a new retail building. Sitt has also been a stealthy but major SoHo buyer.

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Zero Halliburton Luggage — whose indestructible suitcases are often used in movies and TV shows to hold cash and weaponry — has leased 3,900 square feet for a new store at 300 Madison Ave. at the southwest corner of 42nd Street.

Joanne Podell, Brandon Singer, Ian Lerner, Christian Stanton and Jeff Cushman of Cushman & Wakefield represented the tenant in the 10-year deal.

Ed Hogan of Brookfield Properties represented the CIBC/Brookfield owners, who had an asking rent of $300 a foot. The space was previously occupied by a Loft for a temporary store.

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Forest City Ratner’s Barclays Center is worth almost $800 million, according to new figures released by the Finance Department.

The new home of the Brooklyn Nets, which opened in September, has a tentative estimated market value of $786,002,184. Based on last year’s tax rates, it will pay about $33,856,748 to the city coffers for the tax year that begins July 1.

Last year, lawyers for FCR challenged the Finance Department’s assessed value of the arena.

FCR dropped the effort when the move drew jeers from critics, even though many building owners automatically file similar challenges each year to maintain their legal rights.