Regulatory framework
The code baseline for Darke County.
Darke County Building Regulations administers Ohio residential and commercial construction, electrical, and heating/HVAC permits and inspections under the applicable Ohio building codes; the official county page does not identify a specific 2026 edition.
Inspection lane
Apply for residential permits at the Darke County Building Regulations office. Commercial building, electrical, and heating/HVAC plans are submitted through the Miami County online permits portal; contact 937-547-7379 for local instructions. Zoning and Darke County Health Department approvals may also be required.