The grand 32,000 square (16,772 living space) foot mega mansion being built at 779 Gulf Shore Boulevard North in Naples, FL is almost completed. Owned by industrialist Neil Whitesell, it will be Collier County’s largest home upon completion. he largest homes in the area once completed. The total square footage includes garages, storage, and outdoor living. It is being built on 2 waterfront lots that span 1.56 acres and will boast 6 bedrooms and 7 full and 3 half baths.