Beacon Partners’ latest South End project has officially broken ground.

The RailYard will include 300,000 square feet of creative office space and 30,000 square feet of retail space at the former HD Supply site, a 3.5-acre block bounded by Tryon, Bland, Winnifred and Winona streets. The eight-story, two-building project is expected to deliver in January 2019.

As part of the project, developer and architect David Furman will also still develop 100 micro-unit apartments at the rear of the property, a Beacon Partners spokeswoman confirmed Tuesday.

No tenants have yet signed on at The RailYard. A 15,000-square-foot community gathering space — the Yard — will be developed between the two buildings to accommodate functions like outdoor dining, shopping and music after hours. The ground-floor retail will consist of four restaurant spaces, all with outdoor dining. The Yard will also be connected to an indoor area, Central Station, via a 40-foot wide, roll-up door that provides almost a half-acre of furnished gathering space, Beacon said. A coffee shop and cafe will be included in that space as well.