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

At a glance

Building permit

No general county building code; Ohio code approval depends on the building and jurisdiction, and county floodplain approval is required in flood hazard areas²⁶⁷

County zoning

No county zoning; local rules include a mapped district in The Plains and separate municipal zoning⁸⁹⁵

Septic permits

Installation and operation permits are required; the Athens City-County Health Department administers the local program¹⁰¹¹¹²

RV or temporary camping

No county zoning restriction in unincorporated areas; township, sewage, health and floodplain rules can still apply¹³¹⁴

Tiny home

No county zoning restriction in unincorporated areas; Ohio residential-code, sewage and floodplain rules may still apply¹⁵⁶

Owner-builder

Residential-code submissions, inspections and occupancy certificates are waived only where no certified residential building department has jurisdiction¹⁶

Subdivision

County Planner approval is required for qualifying parcel splits before recording¹⁷

Private well

A board-of-health permit is generally required before construction, alteration or sealing¹⁸

Who to call

Contact details are copied from each office’s official page and were checked against it on October 9, 2026.

Do you need a building permit in Athens County, Ohio?

Athens County does not administer a general county building code, except for requirements on new or substantially improved buildings in floodplains². Any development in an Athens County floodplain needs a county permit⁷; covered work includes houses, manufactured homes, substantial alterations, accessory buildings, grading and fill¹⁹. Ohio's statewide codes still govern covered construction, including detached one-, two- and three-family homes under the Residential Code²⁰. Required plans go to the certified municipal, township or county department with jurisdiction; nonresidential plans go to the state when no certified local department covers them²¹. If no certified residential department has jurisdiction, the owner does not need the residential-code submissions, inspections or occupancy certificate, but floodplain, septic and subdivision requirements remain¹⁶. Confirm the serving department for the parcel and building type before work begins.

Who issues building permits in Athens County, and how do you reach them?

Athens County does not publish one building department for every project; certified departments may cover residential work, nonresidential work or both²². For an unincorporated parcel, start with the Athens County Regional Planner, which handles county floodplain permits and subdivision review²³. Inside the City of Athens and other municipalities, the city issues zoning permits, while septic permits for any Athens County address still go through the Athens City-County Health Department⁵⁴²⁴. Ask which certified building department serves the address and building type before submitting plans. Where a residential building official has jurisdiction, a new home cannot be occupied until a certificate of occupancy is issued²⁵. The exception for areas without a certified residential department is jurisdictional, not a blanket owner-builder exemption, and we could not confirm the department serving every Athens County parcel¹⁶. A qualifying agricultural building may receive a state building-law exemption, but floodplain, subdivision, septic, fire or utility requirements may remain²⁶.

Does Athens County have zoning?

Athens County has no adopted county zoning, but that does not mean every parcel is unzoned⁸. The City of Athens administers zoning and publishes a zoning map, while other municipalities require their own review²⁷⁵. Athens Township zones the bounded The Plains area rather than the whole township⁹. On existing unincorporated parcels outside local zoning, Athens County sets no zoning-based minimum dwelling size, lot-coverage limit or building-height limit²⁸²⁹³⁰. New subdivision lots are different: county tables set minimum lot dimensions and setbacks according to development, roads, utilities and terrain³¹³². Before treating an RV, tiny home or manufactured home as allowed, identify the municipality or township and determine whether the parcel is an existing lot or a proposed split.

How do septic permits work in Athens County, Ohio?

The Athens City-County Health Department administers sewage-system permits in Athens County¹⁰. A new or replacement system needs a soil and site evaluation, qualified design, application, floor plan, plat map, operation-permit form and fee; installation must be performed by a registered installer³³. Ohio requires installation or alteration approval and a valid operation permit, while Athens County issues five-year operation permits for systems installed or altered since 2015¹¹³⁴. The department inspects enrolled systems at renewal but may accept a service provider's formal inspection¹². Sewage from a dwelling must go to an approved treatment system or sanitary sewer³⁵. Only 3% of county soils are rated free of severe limits for a conventional drain field, so establish septic feasibility before buying³⁶.

Can you live in an RV or tiny home on your land in Athens County?

Unincorporated Athens County has no county zoning restriction on RV occupancy or temporary camping on a specific parcel¹³¹⁴. That answers only the county-zoning question: township, municipal, sewage, health, floodplain and state rules may still control the setup¹⁴. Tiny homes, accessory dwellings and manufactured homes likewise face no county zoning restriction on unincorporated land, but building-code, installation, sewage and floodplain requirements can still apply¹⁵³⁷³⁸. A manufactured home regulated by Ohio's installation rules generally cannot be occupied until it receives an inspection seal³⁹. Before placing any unit, ask the Regional Planner whether floodplain or subdivision rules apply, identify any municipal or township zoning, and ask the Health Department how sewage will be handled.

Building a home in Athens County: the steps, in order

1. Locate the parcel in its municipality or township because zoning and building jurisdiction vary locally⁴⁰.

1. Ask the Athens County Regional Planner whether the site is in a flood hazard area and whether a proposed split needs subdivision approval²³⁴¹⁴².

1. Confirm which certified building department covers the building type; required plans must be approved before covered work begins unless the residential no-certified-department exception applies²¹¹⁶.

1. Complete the soil evaluation, sewage design and permit process with the Athens City-County Health Department before installation³³.

1. Identify who controls the road. New or replacement access onto a county road requires an access or culvert permit and final inspection; other roads have different authorities⁴³.

1. Complete required inspections and obtain the applicable occupancy approval before using the home⁴⁴²⁵.

What should you check before buying land in Athens County?

Check sewage feasibility first because only 3% of Athens County soils are rated free of severe limitations for a conventional drain field³⁶. The Athens County Water and Sewer District serves The Plains and the US 50 Sanitary Sewer Project area, but service depends on the parcel⁴⁵. Within the sewer district, accessible existing buildings must connect after official notice; a county-water connection requires capacity and meter fees⁴⁶⁴⁷. Review flood mapping because floodplain development needs county approval, with separate residential and commercial permit fees⁴¹⁴⁸. For a proposed split, verify subdivision approval, setbacks and final-plat access before closing¹⁷³²⁴⁹. Terrain can add cost because 30.7% of county land has a slope of 15% or less and 78.2% is wooded⁵⁰⁵¹.

Watch-outs

• Athens County's lack of county zoning does not settle building-code jurisdiction; the owner-builder exception applies only where no certified residential department has jurisdiction¹⁶.
• Athens Township zoning covers only the bounded The Plains area, while municipal zoning must be checked separately⁹⁵.
• A floodplain permit becomes void if work does not begin within 180 days and remains valid for one year from issuance⁵².
• A short-term rental operating as lodging must register with the Athens County Auditor within 30 days of starting business, but registration does not establish that local land-use rules allow the rental⁵³.

Sources

1. Regional Planner, quoted and re-checked
2. Athens County Comprehensive Land Use Plan, quoted and re-checked
3. Chapter 3781 - Ohio Revised Code, quoted and re-checked
4. Rule 3701-29-09 | Site review and permits for STS installation and operation, quoted and re-checked
5. Regional Planner, quoted and re-checked
6. Ohio Administrative Code Rule 4101:1-1-01, Administration, quoted and re-checked
7. Regional Planner | Athens County, OH, quoted and re-checked
8. co.athensoh.org, quoted and re-checked
9. A Zoning Code for a Portion of Athens Township in The Plains, Ohio, quoted and re-checked
10. Sewage Treatment System Operation and Maintenance Program, quoted and re-checked
11. codes.ohio.gov, quoted and re-checked
12. Sewage Treatment System Operation and Maintenance Program, quoted and re-checked
13. Athens County, OH — Regional Planner, quoted and re-checked
14. Athens County, OH — Regional Planner, quoted and re-checked
15. Athens County, OH — Regional Planner, quoted and re-checked
16. Rule 4101:8-1-01 | Administration, quoted and re-checked
17. Athens County Regional Planner, quoted and re-checked
18. Chapter 3701-28 | Private water systems (Ohio statewide rule), quoted and re-checked
19. Regional Planner — Athens County, OH, quoted and re-checked
20. Ohio Administrative Code 4101:8-1-01, Administration, quoted and re-checked
21. Chapter 3791 | Ohio Revised Code, quoted and re-checked
22. Section 3781.10 | Board of building standards - powers and duties, quoted and re-checked
23. Athens County Regional Planner (Athens County Planning Commission) (co.athensoh.org)
24. Athens City-County Health Department, Environmental Health Division (athenspublichealth.org)
25. Residential Code of Ohio, Certificate of Occupancy and Certificate of Completion, quoted and re-checked
26. Section 3781.061 | Exemption for building or structure used in agriculture, quoted and re-checked
27. City Maps & GIS, quoted and re-checked
28. co.athensoh.org, quoted and re-checked
29. co.athensoh.org, quoted and re-checked
30. co.athensoh.org, quoted and re-checked
31. Subdivision Regulations of Athens County, quoted and re-checked
32. Subdivision Regulations of Athens County, quoted and re-checked
33. Steps for Obtaining a New or Replacement Home Sewage Treatment System Permit, quoted and re-checked
34. Sewage Treatment System Operation and Maintenance Program, quoted and re-checked
35. Rule 3701-29-06 — General provisions and prohibitions, quoted and re-checked
36. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
37. Athens County, OH — Regional Planner, quoted and re-checked
38. Athens County, OH — County Planner Regulations, quoted and re-checked
39. Chapter 4781-7 | Manufactured home inspections (Ohio statewide rule), quoted and re-checked
40. athenstwp.com, quoted and re-checked
41. co.athensoh.org, quoted and re-checked
42. Subdivision Regulations of Athens County, Ohio, quoted and re-checked
43. Athens County Engineer Driveway Culvert / Access Permit for County Roads, quoted and re-checked
44. Residential Code of Ohio, Rule 4101:8-1-01, Section 108 Inspection Process, quoted and re-checked
45. Water & Sewer Districts, quoted and re-checked
46. Athens County Water and Sewer District Policy and Procedure Manual, quoted and re-checked
47. Athens County Water and Sewer District Policy and Procedure Manual, quoted and re-checked
48. Athens County Floodplain Permit: Special Flood Hazard Development Permit, quoted and re-checked
49. Subdivision Regulations of Athens County, Ohio, quoted and re-checked
50. Share of land at 15% slope or less: Bolthole Index county data
51. Wooded share of land: Bolthole Index county data
52. Athens County Floodplain Permit: Special Flood Hazard Development Permit, quoted and re-checked
53. Athens County Lodging Excise Tax Code of Regulations, quoted and re-checked

Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.