400 Central is a mixed-use development consisting of a 45-story luxury residential tower and 18-story hotel connected by a seven-level podium, which will also provide retail space, office space, and structured parking. Once complete, the residential tower will be the tallest building in St. Petersburg. Langan initially conducted environmental assessment services at the site prior to the purchase of the property. As the project’s geotechnical engineer of record, we recommended implementing a non-redundant drilled shaft foundation system to support the tall tower, resulting in significant cost savings. We also achieved cost savings by recommending a ground improvement program for the podium. This will require additional analyses because of the varied foundation but will cost less than a deep foundation system.