As all New Yorkers know, if you’re not moving forward, you’re behind, and real estate is no exception. Summer saw some of the island’s most influential denizens make real estate moves and news in keeping with the city’s exhilarating pace.

Some noted developments:

Alert to all aspiring Upper East Side trophy property holders and investors: there was a drop in the asking price for the “Versailles in Manhattan” and the listing moved over to Compass. Kenneth D. Laub’s spectacular East 64th Street townhome, dubbed “Versailles in Manhattan” for its rococo Louis XIV layout and interiors can now be yours for a cool $25 million. Over on Fifth Avenue Sotheby’s just listed the most grand and colorful apartment in one of Fifth Avenue’s most prestigious co-ops for $21 million. While Downtown charges forward with sleek designs by Zaha Hadid and her contemporaries, the Upper East Side still owns refined grandeur.

Meanwhile, the car dealerships and warehouses along the West Side Highway will have to get used to a slightly more glamorous neighbor: Jeff Koons is moving in. The artist, whose sculptures routinely fetch millions at auction, snapped up three adjacent properties on West 52nd Street by the river to serve as a studio, and has already perched one of his iconic steel balloon-style sculptures atop the studio in progress – marking his territory, you might say.

Further down on the West Side, Hudson Yards continues to take shape as a unique amalgamation of residential, retail, and cultural space. Befitting New York’s world-class combination of these categories, the 28-acre site will feature a Neiman Marcus, a culture space (appropriately dubbed the Culture Shed) with a retractable roof that renders it good for performances and exhibitions year round, and 15 Hudson Yards – the first residential tower under construction, which is sure to fill even the most discerning of buyers’ desire for location, location, location.

For those whose dreams behold the Brooklyn Bridge, Fortis drew back the curtain on renderings of its 60-story luxury Seaport tower just before the drapes closed on summer. Curbed reported S. Russell Groves, an AD100 architect, is the designer. Elliman has the listing with prices rumored to range from $1-20+ million.