A fence was recently installed at the site, but construction permits for the new buildings have not yet been applied for.
From their website:
600 Alton Road is the first residential and commercial project seen when entering Miami Beach. Its intimate residences and beautiful interior spaces make it the perfect place to both live and play. The entire ground floor is 60,000 SF of beautifully landscaped indoor and outdoor retail spaces. 600 Alton will be loved by retailers, residents and visitors alike.