Downtown St. Petersburg has a new high-rise heavyweight. Construction has officially topped out on 3rd & 3rd, a 33-story, 375-foot apartment tower that is reshaping the city’s skyline where 3rd Avenue South meets 3rd Street South. When it opens, the project is set to bring about 262 apartments plus street-level retail to a rapidly filling corner of the urban core.
KAST Construction, the builder on the job, is treating the milestone as a serious team win. In comments to St. Pete Rising, KAST senior vice president Kristine Retetagos called the topping out a major coordination feat and said, "We're proud to reach this milestone," adding that the crew is now focused on pushing the project toward completion. The new tower rises right next to EVO, a 23-story residential building wrapped up in 2023, tightening the cluster of high-rises in the neighborhood.
What the project includes
Once finished, 3rd & 3rd is slated to deliver roughly 262 apartments ranging from studios to two-story penthouses stacked above about 15,000 square feet of ground-floor retail and a parking garage with roughly 330 spaces. Topping out at 375 feet across 33 stories, the building lands among the tallest in St. Petersburg and is expected to noticeably change the feel of the surrounding blocks, according to Florida YIMBY.
Design, amenities and the view
The design leans hard into a contemporary look, with sharp, angular balconies and floor-to-ceiling windows stacked over a darker podium that visually grounds the tower. Residents are expected to get an eighth-floor amenity deck with an outdoor pool, cabanas, fire pits and a sizable TV wall, along with indoor features that include a TrackMan golf simulator, coworking areas and conference rooms, as detailed by St. Pete Rising. From many angles around downtown, the structure now lines up against Tampa Bay on the horizon, making its presence hard to miss.
Construction timeline and milestones
The vertical rise followed a massive foundation pour estimated at about 4,000 cubic yards of concrete, a job that demanded between 380 and 420 truck deliveries over a continuous 12- to 14-hour window. The topping-out moment came roughly one year after that foundation work wrapped, and developers are targeting a temporary certificate of occupancy in October or November, according to Florida YIMBY.
Developers, permits and retail leasing
Property records list an Echelon-linked entity as the parcel owner, per the Pinellas County Property Appraiser. The project is being developed by St. Pete-based Echelon in partnership with Third Lake Capital. On the ground floor, retail space is already in play, with Axxos Commercial marketing storefronts and LoopNet listings flagging available bays and tentative late-2026 delivery windows. City planning files and earlier St. Petersburg City Council review documents trace the proposal back to 2022, when approvals set the development in motion.
With the structural frame now in place, crews are shifting into glazing, interior fit-out and podium work as the site moves toward occupancy, retail leasing and, ultimately, move-in dates. For anyone watching the cranes downtown, the topping out at 3rd & 3rd is another clear signal that St. Pete’s skyline is in flux, bringing new housing options along with familiar questions about how infrastructure will keep pace.
