S+B Gruppe AG is a privately-owned real estate development and investment company headquartered in Vienna, Austria, founded in 1986 under the name Plan&Bau before adopting its current name in 2008. Acting as both investor and general contractor, the firm specializes in architectural design, contracting, financial management, and marketing for construction projects, with a historical focus on office, residential, and retail developments. It maintains a consolidated presence across four core markets, Vienna, Prague, Bucharest, and Warsaw, having opened its Bucharest branch in 2008 following its first office project in the city in the mid-2000s.