Lowndes Square, a prestigious garden square in Knightsbridge, is home to a grand property that was once three separate apartments and a mews house. The property, known as the "key house," is situated on the most desirable east side of the square and boasts direct views of Sloane Street. After obtaining planning permission from Westminster Council, the property is being redeveloped into a luxurious single residence with 10 bedroom suites, impressive entertaining spaces, and state-of-the-art amenities including a swimming pool, spa complex, and internal parking for two cars. The property will also feature three outdoor terraces and a large passenger lift with step-free access throughout, making it an ideal home for those seeking a unique and luxurious living experience in one of London's most sought-after neighborhoods.