Older housing stock in a slow-growing Hamilton County town
With population at just 3,106 as of the 2020 census — far slower growth than Carmel's other neighbors — Sheridan's housing stock skews older, and homes near the historic Main Street corridor that grew up around the Monon Railroad after natural gas was discovered locally in 1888 are more likely to have crawlspace or basement construction that predates modern moisture-control standards.
A documentation gap from Sheridan's 1913 fire
Sheridan lost most of its early municipal records in a 1913 fire that destroyed the town hall, so there's often no clean paper trail for when an older home's crawlspace or basement was last touched — a mold assessment has to read the physical evidence rather than assume a construction date from records.