Castille Urbana market snapshot (as of June 25, 2026): the median sale price is about $875K ($543 per sq ft), with homes averaging 190 days on market and 5.1 months of supply, a buyer-leaning market (limited data). Based on 7 recent closings in live Stellar MLS data.
Castille Urbana is a residential condominium at 600 3rd Avenue South in downtown St Petersburg, three blocks south of the Central Avenue dining and bar corridor (St Pete Rising and St Pete Catalyst, 2025). It is a five-story building with 40 condominium residences, a mid-rise rather than a tower, built between 2023 and 2025 and opened to move-ins in early 2025.
The building was developed by NJR Investment and Development Company, led by Neil Rauenhorst, and sits about 150 feet east of the developer sold-out sister project Domus Urbana at 644 3rd Avenue South (St Pete Rising, 2025). Units are two and three bedroom floor plans cited at roughly 1,158 to 1,650 square feet, each with a balcony, nine-foot ceilings (ten feet on the fifth floor), hardwood flooring, and quartz kitchen counters; confirm the exact size, bedroom count, and finishes for any specific unit.
Because this is one building, the money is made or lost on the association and the unit, not on the address. The drivers are the monthly dues, the reserve funding under Florida current condo safety rules, the condo insurance line, and the specific unit floor, exposure, and condition, all of which have to be read from the current association documents for the exact unit.
The pitch is a walkable downtown address: Central Avenue, the St Petersburg waterfront parks, the Pier, the Dali Museum, and the Grand Central District are all close, with Interstate 275 and the Sunshine Skyway a short drive. The work is the diligence: read the budget and the reserve plan, quote the insurance, and confirm the assigned parking and pet rules before you buy the new-build finish.
