1 Mayfair is a landmark ultra-prime residential development by Caudwell, located in the heart of Mayfair, London. With an estimated total investment of £2 billion, this project blends historical elegance with contemporary luxury, offering one of the most prestigious addresses in the capital. Designed by world-renowned architect Robert A.M. Stern, the development spans approximately 305,000 sq ft and features a range of residences, including five short-stay apartments and exclusive manor-style entertaining spaces such as a grand reception room and private lounge.