In June of 1885, Henry and Susan Adams sold the property as follows: it was divided into 2 lots. On one lot, a home was built, and it was these two lots that sold for $4,200.

After a number of iterations, including 627 Prospect becoming the Prospect Street Congregational Church, the lot eventually was split up into three addresses. It is in the 1913 Sandborn Map that 623 Prospect Boulevard first makes an appearance, however.

Little is known about Otto Koehn, but we do know he was a clerk at the church and some census records exist that confirm his birth in 1861 and passing in 1928. Otto’s father was born in Germany, though he himself was an American. His wife, Bertha, was a German immigrant who passed away in 1938.


623 Prospect is an example of the Gabled–Ell which is common, folk home, affordable to many working class Americans at the turn of the 19th century. The home has a rectangular floor plan, sitting at 2 stories tall with wood clapboard siding and a roof with a prominent front gable with intersecting gables. Significant features include the full-width front porch, the decorative spindle rails and the molded cornice with window hoods and an oriel window on the second floor.



Sources: 1998 Heritage Plaque Application; Audio: TextAloud