By the early 21st century, the market for office accommodation in the city was characterised by fluctuating demand and a lack of supply of high-quality buildings. As an example, the Trafalgar Place development ( 1990), "now considered a prime office location", stood partly empty for a decade. Exion 27 (built in 2001), a high-tech, energy-efficient office development at Hollingbury, remained empty for several years and is still not in commercial use: it houses some administrative departments of the University of Brighton. It was Brighton's first ultramodern commercial property and was intended for mixed commercial and industrial use, but its completion coincided with a slump in demand for high-tech premises.