Qatari Diar Qatari Diar Main Office Building Energy City, Lusail, Qatar In 2016, our team had the privilege of leading the sustainability design for Qatari Diar’s Main Office Building, a landmark project in Energy City, Lusail, Qatar. Commercial 4-Star certification. Developed in collaboration with INSIGHTS Built-up Area: 89,190 m2 Floors: B + G + 4F Scope: Sustainabile Design and GSAS Certification Sustainability Design GSAS Commercial 4 Stars