Hansen's Annex is a historic house on Main Street in Center Sandwich, New Hampshire, United States.

It is a two-story wood-frame house, three bays wide and a single room deep, with a side-gable roof.

This assemblage was one of the finest such collections in New Hampshire's Lakes Region, but was largely lost in the late 19th and early 20th centuries to fire and demolition.

[3] The house was built sometime before 1839, when its sale from Ezra Gould to John Folsom was recorded, and apparently served as a private residence at that time.

By 1868 it was owned by George Hansen, who used the house and an attached barn (no longer extant) as a tavern and livery stable.