A waterfront mansion on Miami Beach’s gated Sunset Islands will be listed for $22 million, or $2,288 per square foot, The Real Deal has learned. Kobi Karp designed the 20,000-square-foot property at 1435 West 27th Street. Luxury Miami Beach homebuilder Bart Reines completed the 10,500-square-foot mansion in 2013, listing agent Melissa Rubin told TRD. That includes 9,613 square feet of interior space. It will hit the market on Nov. 1.