A California buyer purchased a waterfront mansion and lot on North Bay Road for a combined $35.4 million, marking a record sale in Miami Beach this year, The Real Deal has learned.

Ami Shashoua sold the spec mansion at 6360 North Bay Road for $23.85 million. The lot next door at 6342 North Bay Road, owned by spec home developer Peter Fine, sold for $11.55 million, according to Redfin.

The buyer of both bayfront properties is from California, according to a source familiar with the deal. The buyer’s plans for the lot are unclear, but he didn’t want anyone else buying it and building there, the source said.

The properties were on the market for a combined $44.5 million, and sold at 20 percent below ask. Nelson Gonzalez of Berkshire Hathaway HomeServices EWM Realty was the listing agent for both properties. Jill Hertzberg of the Jills Zeder Group at Coldwell Bank brought the buyer, according to Redfin.

Gonzalez confirmed that the properties sold, but declined to disclose the prices or identify the buyer. The 13,381-square-foot mansion, with a guest house, has a total of 13 bedrooms, 14 bathrooms and three half-baths. It sits on a 27,600-square-foot lot and has 112 feet of water frontage. Todd Michael Glaser built the home. Choeff Levy Fischman designed it.

The property also features 3,000 square feet of rooftop decks, a three-car garage, cabana house with kitchenette, summer kitchen, mosaic glass pool with spa, new seawall and pier dock. It was on the market for $32 million, according to the listing.

Next door, the 24,407-square-foot lot has another 100 feet of water frontage. It was priced at $12.5 million. Fine’s 6342 NBR LLC purchased the property for $9.5 million in 2015, records show.

Among other recent waterfront sales on North Bay Road, Yext founder and CEO Howard Lerman paid $17 million in February for a 10,665-square-foot spec mansion at 6010 North Bay Road. That same month, spec home developer Philippe Harari of the Aquablue Group sold the waterfront Palm Island at 73 Palm Avenue for $24.5 million.

And last month, architect Kobi Karp and his wife Nancy paid $8.5 million for 4750 North Bay Road.

Other high-profile homeowners on upper North Bay Road include JDS Development’s Michael Stern, singer-songwriter Phil Collins, and basketball stars Chris Bosh and Dwyane Wade.