Great Portland Estates plc is a British property investment and development company that was founded in 1959. The company focuses on owning and managing high-quality office and retail properties in central London. Their portfolio includes over 50 properties, with a total value of around ÂŁ2.7 billion. Great Portland Estates is committed to sustainable development and has won several awards for their environmentally-friendly building practices. They are also dedicated to improving the communities in which they operate, through initiatives such as supporting local charities and investing in public spaces.