Built in 1764 and designed by one of Britain’s most celebrated Neoclassical-style architects—Robert Adam—this exquisite Grade I listed Central London building was once home to the late Queen Mother, who lived here as a young girl during the early 20th century. The property was acquired off-market by PTP in 2021 on behalf of an international investor. It has retained its regal charm and ornate interior, and now offers Category A commercial office space which will soon benefit from an array of onsite end-of-journey facilities for staff alongside two car parks and a wellness room. In fact, 20 St James’s Square is one of the very few Grade I listed buildings in the UK to have earned an EPC B rating. PTP is both the asset and development manager. This unique property, which will be completed in the summer of 2024, is being marketed for letting via Jones Lang LaSalle.