Houses at 28 and 28 Guerny Street in Cape May, New Jersey.  Part of the Cape May Historic District.  12-30 (evens) Guerny Street are known as "Stockton Place", were identical houses designed by architect Stephen Decatur Button.  12 and 14 Guerny seem to have disappeared (or perhaps were typos) but the other houses remain.
These two houses have porches on the front, which may have been added soon after they were built, other changes on the houses seem rather random and minor accross houses.
<a href="//commons.wikimedia.org/wiki/User:Smallbones" title="User:Smallbones">Smallbones</a>
<span class="int-own-work" lang="en">Own work</span>