3rd & 3rd is being built at the corner of 3rd Avenue South and 3rd Street South in downtown St. pete | Aerial Innovations

A new residential tower in downtown St. Petersburg has reached a major milestone.

KAST Construction has topped out 3rd & 3rd, a 33-story, 262-unit luxury apartment tower rising at 235 3rd Street South.

The project, located on the northwest corner of 3rd Avenue South and 3rd Street South, sits directly across from the Publix-anchored University Village shopping center.

Developed by St. Pete-based Echelon in partnership with Third Lake Capital, the tower was first announced by St. Pete Rising in 2022.

The project received City Council approval later that year, with construction beginning in early 2024.

3rd & 3rd has topped out at 33 stories in downtown St. Pete. The tower is expected to open by the end of the year | Aerial Innovations

The topping out comes roughly a year after vertical construction began, following one of the largest foundation pours ever completed in the city.

“We’re proud to reach this milestone on 3rd & 3rd. Delivering a 33-story tower in the heart of downtown St. Petersburg takes an incredible amount of coordination, and it’s been exciting to see this project rise over the past few years,” said Kristine Retetagos, Senior Vice President and Division Manager at KAST Construction. “We’re looking forward to bringing it to completion and adding another high-quality residential community to the City of St. Pete.”

Once complete, 3rd & 3rd will feature 262 apartments ranging from studios to large two-story penthouse units on the top floor.

The building will also include a 330-space parking garage and approximately 15,000 square feet of ground-floor retail space, which is currently available for lease through Axxos Commercial.

3rd & 3rd under construction next to EVO, a 23-story residential tower completed in 2023 | Aerial Innovations

Residents will have access to an expansive eighth-floor amenity deck with an outdoor pool, cabanas, fire pits, and a large TV wall.

Additional amenities include a fitness center, community kitchen, coworking spaces, and conference rooms.

The tower features large angular balconies, floor-to-ceiling windows, and a modern exterior with dark accents along the parking garage and base.

The project is expected to receive its temporary certificate of occupancy in October or November, with move-ins to follow shortly after.

3rd & 3rd’s 8th floor residential amenity deck | Echelon

3rd & 3rd marks the fourth collaboration between KAST Construction and Echelon.

In 2024, the team completed Park & Main, a 17-story apartment tower at Echelon City Center in north St. Pete. KAST is currently working with Echelon on the 14-story, 363-unit ClearView apartment tower, also at Echelon City Center.

Echelon is also planning a 31-story twin-tower apartment development on the west side of downtown St. Pete at 800 2nd Avenue South.

The project will feature 824 market-rate apartments, more than 35,000 square feet of ground-floor retail, and over 1.5 million square feet of total development.

The project has been approved and a groundbreaking is expected later this year.