of the 1870s
Some were built on farms, many in Delaware County. Some were built in towns like Prospect or Ostrander. Most are still in use, although some have been modified with new siding and other modern improvements.
From my limited knowledge of architecture, I'd have to classify the style as a local variant of Italianate Victorian. It's a thrifty, plain version of that style, lacking most of the ornamentation that one finds on Italianate Victorian mansions. I've looked for this version in other regions but have rarely found it, except for a few houses in Denver. It reminds me of home.
Here's a good example, built in 1875 at the corner of Pennsylvania Avenue and North Sandusky Street in the nearby city of Delaware, Ohio.
All these houses have hipped roofs, but this roof is unusually steep and is further augmented by dormer windows. I presume that these features are modern additions, as is the sheltered entry on the left.
However, most of the other typical features are here: red-brick construction, at least one porch, at least one octagonal bay two stories high. The tall windows are all the same size, consisting of two double-hung panes and capped top and bottom with sandstone lintels and sills. The generous vertical dimensions allow for 12-foot ceilings in the rooms inside.
Like the brownstones of New York City, these boxy Italianate Victorians may not be particularly beautiful. However, they are evocative of the part of Ohio where I grew up.