This Grade II listed apartment offers a rare chance to create a bespoke home of remarkable scale and character in a prestigious Westminster address. The property features a private porticoed entrance, grand residence with private lift, magnificent ballroom, sauna, and sole use of a beautifully landscaped garden with direct access to St James's Park. The apartment boasts original period features such as sweeping staircases, gilded cornices, bow windows, and soaring ceilings throughout elegant reception rooms, including a showstopping ballroom that spans the full width of the property. The generous bedroom accommodation offers scope for luxurious ensuite living, while the lower level includes a large kitchen with separate street access and flexible space for a gym, home office, or indoor pool (subject to planning). Located directly opposite St James's Park and moments from Buckingham Palace, Westminster Abbey, and the Houses of Parliament, this is an extraordinary opportunity to blend historic grandeur with modern luxury in the heart of London.