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§ 02
When a permit is required
Permit triggers and exempt work for Allen County
Permit required when construction, enlargement, alteration, repair, relocation, or change of occupancy is performed on a building or structure, subject to listed exceptions.
Detached storage shed under 120 square feet
Patio flat on the ground
Residential cabinets
Backyard recreational play equipment
Gutters
Minor electrical repair work limited to listed switch, socket, fixture, portable equipment, low-voltage, and certain HVAC replacement items
- Exempt Detached storage shed under 120 square feet
- Exempt Patio flat on the ground
- Exempt Residential cabinets
- Exempt Backyard recreational play equipment
- Exempt Gutters
- Exempt Minor electrical repair work limited to listed switch, socket, fixture, portable equipment, low-voltage, and certain HVAC replacement items
Required documents
- Plans and specifications for commercial work
- Residential plans for new construction and additions
- Zoning approval for work outside Lima
- Property owner authorization for non-owner applicants
- Building code
- Ohio Building Code for commercial work; Residential Code of Ohio for one-, two-, and three-family dwellings in the City of Lima. The county department guideline page states it enforces OBC in Allen County.
- Owner-builder
- Written permission from the owner is required if the applicant is not the owner.
- Contractor requirements
- Electrical, HVAC, plumbing, and trade work require the applicable permits; plumbing is handled by the Allen County Health Department.
§ 03
Application process
Application → plan check → issuance → inspection → final
- 01 Confirm whether the work is structural, electrical, mechanical, fire protection, or plumbing.
- 02 Obtain zoning approval from the local zoning authority before applying for a building permit outside Lima.
- 03 Prepare plans and specifications for plan review.
- 04 Submit the permit application and payment to the Building Department.
- 05 Receive approved plans and permit, then schedule inspections through the department.
§ 04
Fee schedule
Allen County building permit fees
Fee type
Amount
01
Plan check fee
Charged at submittal, based on square footage of the addition or altered area or a flat fee.
02
Permit fee formula
Plan review fee is based on square footage or flat fee; building and fire protection permit fees are based on construction costs; electrical and HVAC fees are based on flat rate per device, circuit, or component.
§ 05
Required inspections
Scheduling and sequence
How to schedule
- By phone (phone)
- By email (email)
- Inspection hours
- Monday through Friday, 11:00 a.m. to 3:00 p.m.; appointments may be scheduled outside window hours by calling 419-998-5541.
Typical sequence: Typical sequence: site setbacks, excavation, foundation/reinforcing, slab, framing, insulation, above-ceiling, final, then certificate of occupancy after all trade permits are approved.
§ 06
Frequently asked
Common questions about unincorporated Allen County permits
01 Do I need a building permit in unincorporated Allen County, OH? ▸
Permit required when construction, enlargement, alteration, repair, relocation, or change of occupancy is performed on a building or structure, subject to listed exceptions.
02 How much does a building permit cost in unincorporated Allen County, OH? ▸
Building permit fees in unincorporated Allen County, OH are set by the local building department and vary by project type and valuation. Fees are calculated as: Plan review fee is based on square footage or flat fee; building and fire protection permit fees are based on construction costs; electrical and HVAC fees are based on flat rate per device, circuit, or component.. Plan check fee: Charged at submittal, based on square footage of the addition or altered area or a flat fee..
03 How do I apply for a building permit in unincorporated Allen County, OH? ▸
To apply for a building permit in unincorporated Allen County, OH, follow these steps: 1. Confirm whether the work is structural, electrical, mechanical, fire protection, or plumbing. 2. Obtain zoning approval from the local zoning authority before applying for a building permit outside Lima. 3. Prepare plans and specifications for plan review. 4. Submit the permit application and payment to the Building Department. 5. Receive approved plans and permit, then schedule inspections through the department.
04 What work is exempt from building permits in unincorporated Allen County, OH? ▸
Not all construction work requires a permit in unincorporated Allen County, OH. The following work is generally exempt: Detached storage shed under 120 square feet; Patio flat on the ground; Residential cabinets; Backyard recreational play equipment; Gutters; Minor electrical repair work limited to listed switch, socket, fixture, portable equipment, low-voltage, and certain HVAC replacement items. When in doubt, confirm with the local building department before starting work.
05 How do I schedule a building inspection in unincorporated Allen County, OH? ▸
Once your permit is issued and work reaches an inspection milestone, you can schedule a building inspection in unincorporated Allen County, OH via: By phone, By email.
last verified April 2026
source Lima / Allen County Building Department ↗
entry id permits/ohio/allen/unincorporated
Educational reference. Permit rules and fees change — confirm current requirements directly with Lima / Allen County Building Department before applying. Jaspector is not legal advice.