Ocean Sound is the second of Key Colony's four oceanfront towers on Crandon Boulevard in Key Biscayne, a 12-story building from 1979 whose units step from about 1,100 to nearly 3,800 square feet. Key Colony shares a quarter-mile of private Atlantic beach, lush tropical grounds, pools, and tennis inside one of Miami-Dade's most park-wrapped island villages, minutes from Crandon Park and Bill Baggs State Park. Listing sites report 310 units versus 314 in the state registry. Registry lists the city as Miami and street number 101, but the building is marketed as 251 Crandon Blvd, Key Biscayne.
This building is in our statewide file. When you order, we run a fresh scan across 14 risk categories — inspections, assessments, structural condition, litigation, insurance and more. Your report shows what public records revealed, and just as important, what they couldn't — so you know exactly what to verify before you make an offer. Delivered within 24 hours.
Get the full Intelligence Report — $9.99Recent listings at Key Colony II Ocean Sound range around units 1,078-3,780 sqft.
Key Colony II Ocean Sound was built in approximately 1979 and rises 12 floors with 310 units.
Florida condominiums of this age are subject to milestone inspection and structural reserve requirements. Our Intelligence Report covers what official city and county records show for this building, and what remains for a buyer to verify with the association.
When you buy into a condo building that's 15 or more years old — anywhere in the US — you should expect by default that an assessment, or several, is in effect or on the way: roof repairs, elevator replacement, repaving, facade work. Buildings age on a schedule, and the bill lands on the owners: often hundreds of dollars a month on top of your mortgage, HOA fee, taxes, and insurance. The unit listing rarely mentions any of it.
In Florida, the stakes for older buildings are higher still. Since the 2021 Surfside tragedy, state law requires milestone structural inspections at 30 years (25 in some coastal areas), Structural Integrity Reserve Studies, and — critically — bars associations from waiving reserve funding for structural components, ending decades of artificially low fees. Add the state's insurance surge, and many older buildings carry obligations that never appear in a listing. None of this makes an older building a bad purchase — but the difference between a well-run 1970s tower and a struggling one can be tens of thousands of dollars per unit. That's the question our building intelligence answers.
Nearby in Miami: Star Lakes Estates · Point East One · Jockey Club I · Ocean Point Condominium · The Presidential · All Miami condos