The Lahaina courthouse's two-story, plastered stone walls and basement were constructed in part from materials salvaged from the 1831 fort, which preceded it on this site. The Polynesian newspaper characterized the courthouse as “neat externally” and “without pretension.” A remodeling in 1925, under the direction of Maui architect D'Esmond, elevated the building's appearance. The original interior was gutted, a wooden front lanai removed, the two-story, Doric-columned portico added, and the hipped roof replaced the earlier flat roof and parapet. A 1999 renovation, overseen by Mason Architects, rejuvenated the building to better accommodate a visitor center, museum, community meeting hall, and two art galleries. The coral-block “ruins” standing at the corner of the property were constructed in 1964 as a reminder of the earlier fort which was dismantled in 1854.
The courthouse burned during the devastating wildfires of August 2023. Only the exterior walls remain.