The developers of The Harbour, a luxury condominium project in North Miami Beach, closed on a $30 million land deal with seller Blue Palms Development LLC, according to deed recorded Wednesday in Miami-Dade County.

Blue Palms Holdings LP, a Delaware partnership linked to Miami-based developers Key International Inc. and 13th Floor Investments LLC, paid more than $6.9 million per acre for the 4.4-acre lot.