The Cobb-Marietta Coliseum and Exhibit Hall Authority has selected a team of locally based firms to manage the expansion and renovation of the convention center.

Impact Development Management will serve as the authority’s representative and project manager for the overhaul, Rule Joy Trammell + Rubio will serve as the project architect and Holder Construction will be the construction manager. The development team plans to break ground on the project in fall 2025, with completion slated for early 2027.

The Cobb Galleria Centre was originally built by the authority in 1994. The facility currently totals 320,000 square feet, including 144,000 square feet of exhibit space, a 25,000-square-foot ballroom, 20 meeting rooms and four executive boardrooms. Also on the campus is Galleria Specialty Shops, an enclave of small retail shops that currently houses tenants including HOKA Shoes and a Subway kiosk.

The master plan for the expansion project includes:

• Demolition of Galleria Specialty Shops, as well as the second floor meeting rooms;
• A new junior ballroom
• The addition of 13,000 square feet of meeting space