From some locations one can see both Sarasota Bay and the Gulf of Mexico. At other points the island widens and accommodates various homes owned both singly and in condominiums, hotels, and sports clubs. According to the United States Census Bureau, the town has a total area of , of which is land and , or 74.19%, is water. Some Longboat Key residents are "snowbirds", who vacation on or own second homes on Longboat Key, and are present only during the winter months. Others are homesteaders, utilizing the various homestead exemptions provided to Florida citizens who own and occupy their principal residences within the state, as set forth under the Florida Constitution. There are numerous restaurants on Longboat Key, Mar Vista, The Lazy Lobster, The Dry Dock, Pattigeorge's Restaurant, Chart House, the Longboat Key Club Restaurant, Euphemia Haye, Maison Blanche, Bayou Tavern, and Harry's. There are also full-service grocery stores, including Publix, and pharmacies, located centrally. Most of the Gulf side of Longboat Key comprises beaches. The southernmost area of the key is mostly part of the Longboat Key Club. Much of the land area of Longboat Key is occupied by either single-family homes or condominium apartments. Most of the condominium associations co-own common elements which comprise pools, tennis courts, sites with water views and access to beaches. Almost the entire land area of Longboat Key is now occupied. The remaining older, singly owned houses are as much as 45 years old, annexed to comparatively small parcels, again an outgrowth of the ½ acre limitation on homestead property area within municipalities as set forth in the Florida Constitution. In the last few years, these properties have been purchased by new owners who sought to and did demolish them in order build small, ornate homes worth much more, many being valued to amounts on the order of as much as a few million dollars, a peculiar outgrowth of the unlimited-in-value homestead exemption for principal residences from forced sale provided to homesteaders under the Florida Constitution. This diverse mix of homes owned both singly and in condominium line the many cul-de-sacs and boulevards branching off main roads towards both the bay and the gulf, with the length of the island served by Gulf of Mexico Drive. A perennial problem for Longboaters was water quantity and quality. Salinity and sedimentary factors threatened the availability of potable water to island residents, visitors, and businesses.