Camped on the Fox River Bank
Carpentersville traces back to 1837, when Julius Angelo Carpenter -- traveling by oxcart from Uxbridge, Massachusetts with his father Charles Valentine Carpenter and uncle Daniel -- camped on the east bank of the Fox River to wait out spring floods during a journey meant to end further west at the Rock River. The family settled instead, first calling the spot 'Carpenters' Grove,' and the name became official as Carpentersville in 1851; growth stayed modest until the electric interurban Carpentersville, Elgin and Aurora Railway arrived in 1896, running four miles to the Illinois Iron and Bolt foundry on Main Street.
From a Flood Camp to a Foundry Town
A settlement that began as a flood-season river camp, and only found faster growth once a foundry-serving interurban line arrived in 1896, has two distinct layers of construction to account for: early riverside building on ground the Carpenter family themselves found prone to spring flooding, and a later wave tied to the Illinois Iron and Bolt works. Both layers sit on Kane County's clay-bearing glacial till, so seasonal soil movement is a factor across the town regardless of which era a given foundation dates to.