(Update at 6:25 p.m.) A new, mixed-use development is in the works for the western end of Columbia Pike.

Pillars Development Group, which built The Berkeley condominium in Ballston, is planning on constructing 78 condominiums and 8,000-square feet of ground floor retail at 4707 Columbia Pike, next to S. Buchanan Street, in the location of the now-closed El Tutumaso Bolivian restaurant.

That restaurant — previously home to a second location of Bob and Edith’s Diner and Sauca, which closed within a year of opening in 2012 — will be bulldozed for the incoming development. Pillars has applied for its first building permit on the site, and Operations Director Marwan Shahin told ARLnow.com today that the company hopes to start digging in May or June.

“We’re hoping we can start having people living in the building 18 to 24 months after that,” Shahin said.

The retail space does not have a prospective occupant yet, but Shahin said the company is looking to sell, not lease, that space to whoever wants to open a business in the first floor. The retail would front onto Columbia Pike and the residential entrance would be off of S. Buchanan Street.

Shahin said there will be a combination of underground and surface parking. The building will be developed (and has been approved) under the Columbia Pike Form-Based Code for commercial districts, which allows some projects to be approved without a hearing before the Arlington County Board.