Building permits, zoning and septic rules in Greene County, Ohio

Yes. Construction under Greene County Building Regulation jurisdiction requires a permit, and zoning approval must come first when the project needs it¹. Residential work served by the county uses the Residential Code of Ohio for one-, two-, and three-family dwellings and their accessory structures¹⁰. Greene County serves most of the county, but Fairborn, Xenia, Bowersville, Clifton, Cedarville, Yellow Springs, and state or federal properties are outside the county office's stated service area¹. An owner may prepare residential plans and supervise construction for the owner's own use, but the owner must still submit plans, obtain applicable approval, and comply with permits and codes⁶. Agricultural buildings may qualify for a conditional state-code exemption, with an additional exemption available through an agricultural-use certificate from the township zoning inspector¹¹.

The Greene County Department of Building Regulation is at 667 Dayton-Xenia Rd., Xenia, OH 45385, phone (937) 562-7420¹. Applications and plans are electronic only through iWorQ; applicable fees must be paid before review, and required local zoning approval must precede building-permit issuance¹. Building fees vary by permit type, area, valuation and inspection circumstances; the published schedule lists $500 for starting work without a permit and $150 for a residential floodplain permit¹². Fees become nonrefundable once processing starts, and an application unpaid for more than 60 calendar days is abandoned¹. Inspections may be scheduled through iWorQ or by telephone by 3 p.m. on the workday before the requested date¹. The existing-commercial-building certificate-of-occupancy process requires an established occupancy, no pending violations or orders, and zoning approval; changes of use, alterations or additions need a different approval process¹³.

Greene County Public Health’s Environmental Health Division handles private sewage-system design review, permits, inspections and operational permits countywide⁴. New or replacement systems and alterations require an installation or alteration permit, an approved site review and a registered installer⁵. The approved permit lasts 1 year from issuance, with a possible extension by the health board⁵. Abandonments also require a permit, and fees include the base permit fee plus known required reinspections; correcting an incomplete or disapproved gravity-flow installation carries a $150 reinspection fee⁴. Greene County inspects all installations and existing systems when requested or required; mound systems need a scratch test, uncovered mound and pump test, and final grade inspection⁴. With 0% of Greene County soils rated free of severe limitations for conventional drain fields, make the site evaluation an early purchase contingency⁸.

The absence of countywide zoning does not establish permission to live in an RV or tiny home in unincorporated Greene County: all townships have their own zoning^2,3. Ask the parcel’s township zoning inspector whether full-time occupancy or temporary occupancy during construction is allowed and which local approvals apply⁷. Building approval and septic requirements remain separate from zoning approval^1,5. A manufactured home generally cannot be occupied until the inspector issues its inspection seal, unless a temporary-occupancy exception applies¹⁴.

1. Identify the parcel's township, city, or village, confirm the zoning district, and obtain required local zoning approval^3,7.
2. Ask Greene County Public Health whether sanitary sewer is available; private septic systems serve qualifying homes where sewer connection is not possible¹⁵.
3. If septic is needed, complete the site review, obtain the installation permit and arrange a registered installer before work begins⁵.
4. If a private well is planned, ask Greene County Public Health which installation, alteration, or abandonment permit applies; the county page does not say that every well-related activity requires one¹⁶.
5. Apply electronically to the building department with jurisdiction, pay applicable fees, and wait for plan approval before construction^1,17.
6. Obtain a county floodplain development permit if the site is in an identified flood-hazard area¹⁸.
7. Schedule the required building and septic inspections through the responsible offices^1,4.

Confirm the parcel's township or municipality, zoning district, and mapped standards before treating the land as buildable³. Budget for septic due diligence because 0% of Greene County soils are rated free of severe limits for a conventional drain field⁸. Check the flood map early because development in an identified flood-hazard area requires a county permit¹⁸. For land outside a municipality, a major subdivision involving new lots, utility extensions, streets, or drainage improvements goes through the Regional Planning and Coordinating Commission⁹. A division creating a parcel under 5 acres generally falls within Ohio's subdivision definition, subject to statutory exceptions¹⁹. Verify road ownership because a new or modified driveway along a county road needs a County Engineer permit before construction²⁰.