Lehoullier Building

The Lehoullier Building is a historic mill tenement house at 161-169 Main Street in Somersworth, New Hampshire. The two story brick building was built by Thomas Parks and Job Harris c. 1843 under a grant from the Great Falls Manufacturing Company, which operated the major textile mills in Somersworth. It is one of two surviving tenement houses that once lined Main Street, and is well preserved despite significant alterations to its exterior when it was converted into an apartment house in the 1950s.

The building was listed on the National Register of Historic Places in 1979.