The block's multiple parcels were bought for nearly $70 million in 2007 by DRI Development Services and Jamestown Properties, with the project first dubbed Plaza on K and then Congressional Square. However, given both the overall climate for office space in the city and the neighborhood's clear shift toward being a residential center, it's not surprising that this project never found its way.

The Recorder of Deeds database lists $63.75 million as the purchase price, but sometimes that doesn't tell the entire story. (And since the RoD site uses Java for its viewer and these days I don't have Java installed, that's the most I can give you right now.)

The Post says that Tishman Speyer is the new owner, and quotes a company representative as saying that the "first apartment building will be completed at the end of 2019 and the second in 2021." No architect has been chosen as of yet. Also, the project could have as much as 80,000 square feet of retail, but "we'll balance supply with demand as the project moves forward."

This block was once home to a firewood lot, a towing company, and a cab company garage, but was mostly cleared by 2008. You can see my older photos and lots of renderings of the now-defunct office project on my Not-Congressional-Square-Anymore project page.

(h/t to commenter jdc)