Ocean Four is an oceanfront condominium at 17201 Collins Avenue in Sunny Isles Beach, the newest and largest of the Related Group's four Ocean towers. Completed in 2006, it holds 281 residences, according to Miami-Dade property records, two- and three-bedroom homes of about 1,300 to 3,000 square feet. Residences look over the ocean, the city and the Intracoastal. Amenities include a three-story lobby, an oversized heated pool and spa overlooking the ocean, a fitness center and beachside cabanas.