Waterfront Estates for Sale on Casey Key, Sarasota County, Florida

Casey Key is among Florida’s most genuinely private barrier islands — and the distinction matters. Unlike Siesta Key or Longboat Key, which have evolved into mixed-use destinations, Casey Key remains a narrow, single-road island with no traffic signals, no commercial development, and approximately 350 private residences stretched along five miles of Gulf beach. Prices range from $5M to $25M+, and the inventory is exactly as limited as you would expect for an island where almost nothing gets built that wasn’t already there. Giant Mansions provides representation for buyers and sellers on Casey Key with the private market access that this secluded community requires.

Giant Mansions on Casey Key

Casey Key transactions are almost entirely relationship-driven. The island’s exclusivity and the privacy priorities of its ownership mean that the most significant properties change hands through private introductions rather than public listings.

• Private market access to Casey Key estates through long-standing seller relationships
• Knowledge of the island’s distinct Gulf-front vs. bay-front lot characteristics
• Experience navigating barrier island-specific considerations: CAMA regulations, flood zones, coastal construction
• Discreet representation for both acquisition and confidential estate sales

Casey Key Waterfront Real Estate

Casey Key runs north-south between Osprey and Nokomis in Sarasota County, separated from the mainland by Little Sarasota Bay. The island’s single road — Casey Key Road — threads through the middle, giving properties on one side Gulf-front access and those on the other side bay frontage on Little Sarasota Bay. This dual-waterfront character is one of the island’s defining features: buyers can choose between an estate on the Gulf with direct beach access, or a bay-front property with boating access to the Intracoastal, or — most coveted — a wider lot with both.

Gulf-Front vs. Bay-Front

Casey Key’s Gulf-front estates are rare even by barrier island standards. The island’s narrow width means Gulf-front lots have limited depth, but what they provide in exchange — private beach, Gulf views, and the sound and light of open water — is irreplaceable. Bay-front properties offer deepwater dock access, typically with no fixed-bridge access to the Intracoastal Waterway, and are the stronger choice for buyers with larger vessels. The handful of through-lots with both Gulf beach and bay dockage are the most sought-after and expensive properties on the island.

Casey Key Property Profile

• Gulf-front estates with private beach access and open Gulf views — $8M to $25M+
• Bay-front properties with private deepwater dockage — $5M to $15M+
• Through-lots spanning Gulf to bay — rare and commanding strong premiums
• Historic Florida vernacular homes and classic mid-century estates with renovation potential

The Casey Key Lifestyle

Life on Casey Key is defined by what is absent as much as what is present. There are no traffic lights, no chain stores, and no vacation rental complexes. The island has been home to some of Florida’s most notable long-term residents — writers, artists, and executives who have chosen seclusion over convenience. Sarasota’s full amenity package is fifteen minutes away by the north bridge, providing access to world-class dining, culture, and healthcare without requiring the island to host any of it.

Acquire a Casey Key Waterfront Estate

Casey Key’s combination of Gulf-front privacy, natural beauty, and proximity to Sarasota makes it one of Florida’s most sought-after and genuinely scarce luxury addresses. Giant Mansions is positioned to connect serious buyers with the island’s available inventory through both public and private channels.

Call (888) 699-2407 for a confidential Casey Key consultation.