New Construction Homes for Sale in Key Marco, Marco Island, FL

Based on information from the Florida Gulf Coast Multiple Listing Service, Inc. through Nov 2, 2026, 2:15 PM. IDX information is provided exclusively for consumers’ personal, non-commercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All information provided is deemed reliable but is not guaranteed and should be independently verified. Some IDX listings have been excluded from this website. © 2026 Florida Gulf Coast Multiple Listing Service - All Rights Reserved.