McCarthy Building Cos. is converting a 1960s-era Clarion Hotel property adjacent to the San Francisco International Airport into a “next generation” business/boutique property.

Aloft, Starwood Hotels & Resorts’ newest brand that launched in 2008, now has 87 locations worldwide, including three in California: This current under-construction property in Millbrae, in Ontario-Rancho Cucamonga and, opening next year, in Cupertino.

Aloft SFO, designed by Jonathan Nehmer + Associates, Rockville, Md., will have 253 rooms, a 5,102-sq-ft lobby with the brand’s signature hang-outs (the w xyz bar and re:fuel by Aloft eatery), 672 sq ft of meeting space and a detached pool. The whole property also features free Wi-Fi.

According to Starwood, the existing six-story hotel was in need of significant capital to update the public space, guest rooms and mechanical systems and infrastructure, and the chain saw an opportunity to reposition the space with its newest, and most popular, brand.

Aloft SFO is scheduled to open in the fall.