Dunn Law will double its space in its new downtown Miami office as the six-attorney law firm prepares for growth.

Dunn Law, led by the mother-son team of partner Marcia Dunn and managing partner Michael Dunn, is moving to a more than 6,000-square-foot office on the fourth floor at 66 W. Flagler St., across the street from the Miami-Dade County civil courthouse. It’s leaving its current space, about 3,000-square-feet at 555 NE 15th St. overlooking Biscayne Bay.