Construction begins on Castille Urbana, a 40-unit condo building, on 3rd Avenue South
/NJR Construction Group has achieved a significant milestone with the groundbreaking of Castille Urbana, a mid-rise condominium building in Downtown St. Petersburg.
Located at 600 3rd Avenue South, Castille Urbana is positioned just 150 feet to the east of the previously completed and sold-out Domus Urbana, a sister project, which was also developed by NJR Construction Group.
Plans for Castille Urbana were announced by St. Pete Rising in December 2021 with reservations for the residences beginning in 2022.
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Pre-leasing is set to begin Saturday, August 15th, with move-ins scheduled after the new year at the first apartment community in Sky Town, an $800 million mixed-use development underway in St. Petersburg’s Skyway Marina District.
The 401-unit iMMiX Apartments, located at 3201 34th Street South, are part of the first phase of the 34.3-acre development being built on the former Ceridian office campus.
Once complete, Sky Town will include 2,084 apartments, 69,000 square feet of retail anchored by a 23,000-square-foot Sprouts Farmers Market, and 120,000 square feet of self-storage across six phases.
Coral Gables-based Altis Cardinal, led by developer Frank Guerra, broke ground on the iMMiX Apartments in September 2025, with Jacksonville-based Summit Contracting Group serving as general contractor.