Oceanside Plaza · #12Y

Oceanside Plaza is an 18-story oceanfront condominium at 5555 Collins Avenue in Mid-Beach, Miami Beach, on the stretch of Collins known as Millionaire's Row. It was designed by Morris Lapidus, the architect of the Fontainebleau, and completed in 1967 as a rental building; Miami-Dade sale records show units first selling as condominiums in 1978 and 1979. The county lists it as Oceanside Plaza Condo with 297 residential units, which makes it one of the larger oceanfront buildings in Mid-Beach. Oceanside Plaza condos are mostly compact one- and two-bedroom homes. MLS records show studios of about 546 square feet, one-bedrooms from about 546 to 1,064 square feet (some are converted studios), two-bedroom, two-bath units from about 912 to 1,361 square feet and a three-bedroom of about 1,580 square feet. East-facing units look over the Atlantic, while west-facing lines take in Indian Creek, Biscayne Bay and the Miami skyline. Many units have balconies, corner units add wraparound terraces, and renovated residences in recent listings feature porcelain tile floors, stainless steel appliances and impact windows. Some units include an assigned parking space. The building is full service, with a 24-hour front desk and security, doorman and concierge service, and valet garage parking. Recreation facilities include a heated pool and spa, a fitness center, a sauna, a rooftop solarium, tennis, indoor basketball and racquetball courts, billiards and a community room, plus an on-site restaurant. Residents have direct beach access with pool and beach service. The address sits at 55th Street on the ocean side of Collins Avenue, with Indian Creek directly across the road. The Fontainebleau and the 44th Street hotel corridor are about a mile south, the shops and restaurants of 41st Street and the Julia Tuttle Causeway to mainland Miami are a short drive away, and North Beach and the 71st Street town center are about two miles north. For buyers comparing Mid-Beach condos and Miami Beach oceanfront condos at entry-level prices, it offers direct beach frontage at well under the per-square-foot pricing of newer towers nearby. Listings in 2025 and 2026 describe the building finishing its 50-year recertification, with lobby, common-area and pool upgrades; the pool was closed for restoration and expected to reopen in 2026, and new pickleball courts were planned. Some listings reference a special assessment tied to the work, so buyers should confirm the current amount and whether the seller has paid it. As of October 2026, MLS shows 12 Oceanside Plaza condos for sale asking about $335,000 to $798,000 and 17 rentals at about $2,700 to $5,475 a month, and closed sales over the prior 12 months had a median of about $428 per square foot. Request current availability and recent sales through the building page.