It appears that the 1960s-era Arlington Executive Building in Courthouse (2009 N. 14th Street), home to the Arlington Chamber of Commerce and other tenants, is finally set to be demolished.

While there’s no word on exactly when demolition is expected to begin, we’re told a crane has been sitting in the building’s parking lot for the past couple of weeks, while the Chamber just announced that it is in the process of moving to a temporary office in Ballston.

Replacing the office building will be a new 16-story, 254-unit apartment building called the Tellus. The mixed-use building will also include more than 15,000 square feet of office and retail space. Construction had been set to begin in 2010, but financial difficulties forced it to be delayed.

Over the next couple of days, the Chamber will be moving to a new, temporary office at 4600 Fairfax Drive, Suite 804. The Chamber says it will be closed to the public through Monday, July 16, during the move.

The Chamber plans to move back into the first-floor office space of the Tellus, once it’s completed. That could happen as soon as 2014, the Chamber says.