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§ 02
When a permit is required
Permit triggers and exempt work for Miami County
General maintenance and repair
Roof repair or replacement on a structure under 200 square feet
Telephone communication utility installation
County roof policy says non-structural tear-off and re-roof work does not require a permit, but structural repairs do
- Exempt General maintenance and repair
- Exempt Roof repair or replacement on a structure under 200 square feet
- Exempt Telephone communication utility installation
- Exempt County roof policy says non-structural tear-off and re-roof work does not require a permit, but structural repairs do
Required documents
- County residential or commercial application, plans, and code compliance material. Residential submittals must be one multipage PDF and one contact for the project.
- Building code
- County page links current building codes and says Miami County enforces the commercial and residential building codes. County page also references 2024 Ohio code changes effective March 1, 2024.
- Contractor requirements
- County page does not show a separate county general contractor license, but state OCILB trade licensing still applies for electrical, plumbing, and HVAC work.
§ 03
Application process
Application → plan check → issuance → inspection → final
- 01 Confirm permit need using the county PDF and current code pages.
- 02 Prepare plans and required documentation as one multipage PDF for residential submittals.
- 03 Submit through the iWorQ portal.
- 04 County staff review the application and plans.
- 05 Pay fees and obtain permit pickup or issuance notification.
- 06 Schedule inspections by phone because the online inspection request link is temporarily disabled on the county page.
§ 04
Fee schedule
Miami County building permit fees
Fee type
Amount
01
Minimum permit fee
Residential fees start at 100 dollars class by class, with many base permits at 150 to 300 dollars depending on scope. Commercial fees start with a 302.50 dollar processing fee for several categories.
02
Plan check fee
Commercial plan review is 140 dollars per hour. Residential plan review is included in the fee schedule categories shown on the county fee PDF.
03
Permit fee formula
Residential fees are square-foot and permit-type based. Commercial fees use processing fees plus square-foot rates, plus special category flat fees.
Fees change periodically. Confirm at the official fee schedule ↗ before budgeting.
§ 05
Required inspections
Scheduling and sequence
How to schedule
- Phone the office at 937-440-8121. The county inspection request webpage says the online request link is disabled. (online)
Typical sequence: County provides a required inspection list for each project after permit review
Residential re-inspection fee is 150 dollars. Commercial re-inspection fee is 165 dollars plus the state assessment fee
§ 06
Frequently asked
Common questions about unincorporated Miami County permits
01 How much does a building permit cost in unincorporated Miami County, OH? ▸
Building permit fees in unincorporated Miami County, OH are set by the local building department and vary by project type and valuation. The minimum permit fee is Residential fees start at 100 dollars class by class, with many base permits at 150 to 300 dollars depending on scope. Commercial fees start with a 302.50 dollar processing fee for several categories.. Fees are calculated as: Residential fees are square-foot and permit-type based. Commercial fees use processing fees plus square-foot rates, plus special category flat fees.. Plan check fee: Commercial plan review is 140 dollars per hour. Residential plan review is included in the fee schedule categories shown on the county fee PDF..
02 How do I apply for a building permit in unincorporated Miami County, OH? ▸
To apply for a building permit in unincorporated Miami County, OH, follow these steps: 1. Confirm permit need using the county PDF and current code pages. 2. Prepare plans and required documentation as one multipage PDF for residential submittals. 3. Submit through the iWorQ portal. 4. County staff review the application and plans. 5. Pay fees and obtain permit pickup or issuance notification. 6. Schedule inspections by phone because the online inspection request link is temporarily disabled on the county page.
03 What work is exempt from building permits in unincorporated Miami County, OH? ▸
Not all construction work requires a permit in unincorporated Miami County, OH. The following work is generally exempt: General maintenance and repair; Roof repair or replacement on a structure under 200 square feet; Telephone communication utility installation; County roof policy says non-structural tear-off and re-roof work does not require a permit, but structural repairs do. When in doubt, confirm with the local building department before starting work.
04 How do I schedule a building inspection in unincorporated Miami County, OH? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated Miami County, OH via: Phone the office at 937-440-8121. The county inspection request webpage says the online request link is disabled..
last verified April 2026
entry id permits/ohio/miami/unincorporated
Educational reference. Permit rules and fees change — confirm current requirements directly with Miami County Department of Development, Building Regulations before applying. Jaspector is not legal advice.