The former customhouse in Wiscasset stands adjacent to its historic waterfront area, at the northwest corner of Water and Fore Streets.

A porch shelters the center entrance, with square paneled posts rising by an entablature and flat roof with balcony rail.

[3] Wiscasset's first customs office was opened in 1791, and was then located in a small building adjacent to the home of the collector, Francis Cook.

The present building was designed Alfred B. Mullett, the Supervising Architect of the United States Treasury Department, and was completed in 1870 by William Hogan, a local contractor.

Hogan at first raided Fort Edgecomb for bricks, until the War Department put a halt to that activity, and also took stones from a family cemetery's enclosing wall.