Building permits, zoning and land rules in Adams County, Ohio

Adams County does not appear to administer residential building permits, but we could not confirm that no certified municipal, township or contracted department covers a particular parcel¹. Ohio has separate residential and nonresidential building codes, and a department may enforce only the code types for which it is certified³. Covered residential work needs approval before it begins when a certified residential department has jurisdiction². If no certified residential department has jurisdiction, the owner need not submit residential construction documents, request inspections or obtain the residential-code certificate of occupancy². Required residential and nonresidential work is inspected after the owner or representative tells the enforcing department it is ready^13,14. A nonresidential building may not be used until the building official issues a certificate of occupancy or completion¹⁴.

We could not confirm a county building department or identify the certified residential and nonresidential departments for every Adams County parcel. Start with the Adams County Commissioners at 215 North Cross Street Suite 102 in West Union and ask which certified department has jurisdiction⁴. Ohio's statewide codes do not establish that Adams County itself enforces them; enforcement by a county inspector depends on a county department certified for the relevant code^3,15. Ask the identified department for its application, fee schedule, project-specific inspection list and occupancy requirements before work begins. Ohio lets a non-architect prepare and file plans for a qualifying residential building, but that is not an exemption from applicable approvals or inspections¹⁰. A qualifying agricultural structure may receive a building-law exemption when a county or township zoning inspector certifies its agricultural use; that does not turn a residence into an exempt farm building¹⁶.

Adams County appears not to administer countywide zoning, but we could not confirm the current rule for every township¹. The Village of West Union has Agricultural/Institutional, Residence, Multi-Family and Mixed-Use, Central Business, Highway Business and Industrial districts; those districts apply only inside the village⁶. Ask the township or municipality governing the parcel about its district, allowed uses, setbacks, lot size, lot coverage and height before relying on land for an RV, tiny home or accessory dwelling. Permanently sited manufactured homes receive state protection in a county zone where single-family homes are allowed, subject to the same generally applicable residential zoning standards and private deed restrictions¹⁷. Agricultural zoning limits are conditional, so obtain the applicable zoning determination instead of assuming every barn is exempt¹⁶.

The Adams County Health Department's Environmental Health Division handles household sewage treatment systems and private water systems¹⁸. A site review comes before the application, and no new or replacement system or alteration may proceed without the board of health's permit⁸. Forms for new installations, repairs or alterations may be submitted by fax, mail or office drop-off⁷. Plan early because only 2.8% of county soils are rated without severe limitations for a conventional drain field¹². Published charges include a $60 operation-and-maintenance permit, a $100 septic reinspection and a $300 permit to abandon an onsite system¹⁹. The board must inspect the completed system again within twelve months after installation approval⁸.

We could not confirm a countywide rule for living in a single RV or tiny home on private land. Ask the parcel's township or municipality whether the unit is treated as an RV, dwelling or manufactured home and what occupancy and setback rules apply¹. Ohio's licensed-park law permits human habitation on an RV or camping space for the term of the park's license, but it does not answer the single-RV private-land question⁹. Ohio's temporary park-camp limits apply to gatherings of five or more camping units, not automatically to one RV on private land²⁰. A manufactured home generally needs a state inspection seal before occupancy, while local siting rules may still apply²¹. Any occupied unit without sanitary sewer still needs an approved sewage system²².

1. Identify the township or municipality and ask about allowed dwelling types, setbacks and parcel standards; West Union has local zoning districts, while rules elsewhere remain parcel-specific^1,6.

1. Ask the Adams County Commissioners which certified residential building department, if any, covers the site⁴.

1. Contact the Adams County Health Department for a septic site review before fixing the house location; most county soils carry severe conventional-drain-field limitations^12,18.

1. Obtain the sewage-system permit and a private-water-system permit if constructing or altering a well^8,11.

1. If a certified residential department has jurisdiction, secure approval, request the listed inspections and obtain the applicable occupancy approval before moving in^2,13.

Make septic feasibility the first contingency: only 2.8% of county soils are rated without severe limits for a conventional drain field¹². Terrain can compound siting costs because 51.6% of the county is at a slope of 15% or less and 62.6% is wooded¹². Confirm legal road access and ask the county about driveway approval because we could not confirm a countywide driveway rule. Floodplain administration and permitting apply in unincorporated Adams County, but we could not confirm the operative thresholds or application steps²³. Ohio generally treats a land division as a subdivision when it creates multiple parcels and any parcel is under 5 acres, subject to statutory exemptions and the applicable planning authority²⁴. The Health Department lists subdivision review at $200 plus $100 per lot¹⁹. The median property-tax bill is about $1,303 per year¹².