Premium office space around the world is being redefined due to the strong demand for sustainable and healthy buildings. According to JLL’s Premium Office Rent Tracker research report covering 127 office markets and submarkets in 112 cities, 84 percent of premium office buildings surveyed boast an environmental-sustainability certification such as LEED or BREEAM, widely used benchmarks for green buildings. In high-end markets, that number climbs to 100 percent, underscoring the shift toward environmental consciousness by both landlords who sought the certifications and tenants who chose to occupy green buildings.