It’s tough to expand in a recovering market, but sometimes it makes sense. John Combs talks about what went into his decisionmaking in expanding RiverRock Real Estate Group Inc.

He will share responsibility for overseeing RFR’s six million-square-foot commercial leasing portfolio with fellow executive vice president and co-director of leasing Richard Farley.

The center is managed by Tishman Speyer, which said the lease renewal will retain the company’s headquarters at the office campus through year-end 2015.

Cassidy Turley’s latest expansion move did more than give the company a full-service presence in Denver. The fast-growing company, formed on March 1 with the partnership of a number of former Colliers firms and an assortment of others, found in Denver heavyweight Fuller Real Estate a “perfect fit.”

No one’s predicting a V-shaped recovery anymore–unless they’re saying the right half of the V has been run over by a truck.

When completed three years from now, the skyscraper will be New York’s tallest at 1,776 feet. Should the Conde Nast deal come to pass, the company will likely move from its 800,000 square feet at 4 Times Square in 2014.

The lease is part of the expansion of Microsoft’s New England Research & Development Center in Kendall Square. Cambridge Center’s owner and developer is Boston Properties, Inc.

The largest leases include the 487,370-square-foot Commons at Quartz Hill in Lancaster, California, the 218,503-square-foot Crossroads at 395 in Victorville, California and the 224,783-square-foot Granada Village in Granada Hills, California.

Under a 20-year lease agreement, Healthfirst will maintain its headquarters on four floors at the 21-story building at 100 Church Street, downtown. The property has been in SL Green’s portfolio since January of this year when the REIT became sole owner on the heels of a foreclosure of the senior mezzanine loan on the building.

David Pergola and Jason Levendusky of CB Richard Ellis represented Divco West and Taurus, while Brooks Murphy and Sean Lynch of Jones Lang LaSalle represented Kiva.