Fraser Bond are the leading lettings and property management agents for One Sloane Gardens - London SW1W. One Sloane Gardens is a new development in Chelsea, London SW1. Redevelopment of the former Mansions apartment building into a 30-bedroom hotel and rooftop restaurant. Across the road from Sloane Square tube station. 2019 February - Topping-out ceremony. Neighbouring Buildings - 7 Holbein Place W