Great Portland Estates plc (branded as GPE) is a British property development and investment company.

The firm switched to Real Estate Investment Trust status when REITs were introduced in the United Kingdom in January 2007.

GPE was founded by Howard and Basil Samuel in 1959 to invest in properties originally developed by the Dukes of Portland.

It mainly owns office buildings, with a smaller amount of retail property.

[10] At 31 March 2024 Great Portland Estate's property portfolio was valued at circa £1.9 billion.