Microsoft Corp. plans to expand with about 45,000 square feet in Reston Town Center, according to a recent earnings call by landlord Boston Properties.

The expansion is an addition to the 400,000-square-foot tech hub that is planned for the development.

Here’s more from the Washington Business Journal on the expansion:

The new space adds to what Redwood, Washington-based Microsoft is already leasing at Two Discovery Square, which stands at 12012 Sunset Hills Road. It’s also separately establishing a tech hub at Two Freedom Square, at 11955 Freedom Drive, bringing its total footprint across those two buildings to above 600,000 square feet, according to earnings data and company officials familiar with the situation.

In late May, Microsoft announced that it would invest $64 million to establish a new tub hub that would bring 2,500 new jobs to the area.

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