Building permits, zoning and septic rules in Clinton County, Indiana

At a glance

Building permit

Required for most construction; limited exemptions apply to small portable structures and low, unattached decks¹

Zoning

Area Plan Commission administers county zoning; Frankfort has its own zoning²⁴

Septic permit

Required before specified residential onsite-system construction, installation, alteration, replacement or repair⁷

Portable structures

Structures of 200 square feet or less need no permit, footings or foundation, but location standards still apply⁸

Decks

Decks under 30 inches high need no permit unless attached to an existing structure⁸

Well permits

Not confirmed for Clinton County specifically; several Indiana local health departments require a well-construction permit, so ask the Health Department directly⁹

Owner-builder

No official Clinton County source confirms an owner-builder exemption from permitting; ask the Area Plan Commission directly¹⁰

Septic soil difficulty

Only 1.4% of soils are rated not limited for conventional drain fields; site evaluation is essential, but septic is not necessarily impossible¹¹

Who to call

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Do you need a building permit in Clinton County, Indiana?

Yes, for most construction in unincorporated Clinton County and in Mulberry, Rossville, Kirklin and Colfax, where the Area Plan Commission issues building permits¹²¹³. A portable structure of 200 square feet or less needs no building permit, footings or foundation, while a deck under 30 inches high needs no building permit unless it attaches to an existing structure¹. Portable structures must still follow setback and other location standards, and roof-framing work requires a building permit even though replacing only shingles or decking does not¹. The county identifies residential, plumbing, electrical, mechanical and other state building and safety codes for its service area¹⁴, including the Indiana residential code applicable to one- and two-family dwellings¹⁵. We could not confirm an owner-builder exemption, so ask the Area Plan Commission before doing your own work¹⁰.

Who issues building permits in Clinton County, Indiana?

The Clinton County Area Plan Commission handles building permits, zoning administration and building inspections at 2 E Washington St, Ste 104, Frankfort, IN 46041; call 765-659-6302¹⁶. The commission serves unincorporated Clinton County, Mulberry, Rossville, Kirklin and Colfax². Inside Frankfort, obtain the city's building permit from the Building Inspector before construction begins; septic permitting remains a Health Department responsibility³¹⁷. Start the commission's digital building-permit process by emailing project details to its staff¹⁸. Before scheduling building inspections, obtain a valid building permit and prepay inspections; give 24-hour notice and complete footer, wall and under-floor plumbing inspections before pouring concrete¹⁹.

Does Clinton County have zoning?

The Area Plan Commission administers zoning in unincorporated Clinton County and serves Mulberry, Rossville, Kirklin and Colfax². Frankfort has its own zoning code, while Rossville and Kirklin adopt the county Unified Development Ordinance into their town codes⁴²⁰²¹. Residential septic permits remain with the Clinton County Health Department; Mulberry also requires a town private sewage disposal permit and inspection¹⁷⁶. Obtain the official county ordinance from the commission rather than relying on its downloadable convenience copy²². We could not confirm current setbacks, minimum lot or dwelling size, height limits or lot coverage; ask the planning authority for the parcel's address. The commission provides primary and secondary approval petitions for minor and major subdivisions²³. Indiana's agricultural design-release exemption does not itself establish an exemption from local zoning approval or building inspections²⁴.

How do septic permits work in Clinton County?

Start residential septic permitting in Clinton County with the Clinton County Health Department; local health officers administer Indiana's residential onsite sewage rule, and the Indiana Department of Health reviews local permit programs⁵²⁵. Inside Mulberry, the town Superintendent also issues a private sewage disposal permit and inspection, with additional County Health Department requirements possible⁶. For a residence without sanitary sewer, obtain a written septic construction permit before covered residential construction or system installation, alteration, replacement or repair; the application includes soil evaluation and system plans⁷. Only 1.4% of Clinton County soils are rated not limited for conventional drain fields; that makes site evaluation essential, not septic impossible¹¹. Notify the health officer when work is ready for final septic inspection; absent published local procedures, give at least 48 hours or two working days before covering subsurface work²⁶. Installation must satisfy the health officer before permit requirements are fulfilled²⁷. A dwelling without sewer needs a septic tank and working soil absorption system; temporary holding tanks require written approval in specified circumstances, and sanitary privies must meet state standards²⁸. Drywells and cesspools are prohibited²⁹.

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

We could not confirm that Clinton County allows long-term RV living, temporary camping or tiny-home occupancy on a private parcel. For land in unincorporated Clinton County, Mulberry, Rossville, Kirklin or Colfax, ask the Area Plan Commission what the zoning district allows; for another incorporated address, ask its local zoning authority¹². Indiana's campground rule does not answer private-lot occupancy because it applies to regulated campgrounds and distinguishes individually deeded lots³⁰. A tiny home used as a dwelling still faces the building-permit process and applicable residential code in the commission's service area¹³¹⁴. Regardless of which office handles zoning approval or a building permit, the Clinton County Health Department handles the septic permit, and a dwelling without sewer service must use an approved onsite sewage system¹⁷³¹.

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

1. Identify the building-permit and zoning authority: the Area Plan Commission serves unincorporated Clinton County, Mulberry, Rossville, Kirklin and Colfax; Frankfort issues its own building permits and sets zoning²³⁴.
2. Obtain the official county zoning ordinance from the commission for land under its rules²².
3. Arrange soil evaluation, septic design and the septic-permit application with the Health Department; in Mulberry, ask the town Superintendent about its additional sewage permit⁷⁵⁶.
4. Ask the Health Department whether a well-construction permit is required before drilling⁹³².
5. Email project details to the Area Plan Commission to start its digital building-permit process¹⁸.
6. Prepay building inspections, give 24-hour notice and obtain required inspections before concrete is poured¹⁹.
7. Obtain an INDOT driveway permit before building access onto a state highway³³.

What to check before you buy land in Clinton County

Only 1.4% of Clinton County soils are rated not limited for a conventional septic drain field; get a site evaluation before buying, because the rating does not mean septic is impossible¹¹. Determine whether sanitary sewer is available within a reasonable distance, because availability would require a sewer connection instead of a new onsite system³⁴. About 99.3% of the county is at 15% slope or less and 6% is wooded, so many parcels will be open and nearly level³⁵³⁶. Confirm the parcel's district and obtain the official zoning standards from the Area Plan Commission before buying²². For a tract split from a larger parcel, verify that any required minor or major subdivision approvals were completed³⁷. Check floodway status too: Indiana's DNR Division of Water has jurisdiction over most floodway development, while work in the floodplain's outer fringe generally is not state-reviewed but may still need local approval³⁸³⁹. The effective property-tax rate is about 0.6%, with a median annual bill near $979 and a typical home value near $230,242⁴⁰⁴¹⁴².

Watch-outs

• Only 1.4% of Clinton County soils are rated not limited for conventional septic drain fields; obtain a site evaluation before buying, since difficult soils do not automatically make septic impossible¹¹.
• No official Clinton County source confirms an owner-builder exemption from building permitting; don't assume one applies without asking the Area Plan Commission directly¹⁰.
• We could not confirm a Clinton County well-construction permit requirement; ask the Health Department before drilling⁹³².

Sources

1. Clinton County Area Plan Commission, quoted and re-checked
2. Clinton County Area Plan Commission, quoted and re-checked
3. Frankfort: § 156.10 Building Permit Required (Clinton County), quoted and re-checked
4. Frankfort: Chapter 155: Zoning Code (Clinton County), quoted and re-checked
5. Clinton County Health Department staff, quoted and re-checked
6. Town of Mulberry: § 51.03 Private Sewage Disposal Systems (Clinton County), quoted and re-checked
7. 410 IAC 6-8.3 Residential Onsite Sewage Systems, quoted and re-checked
8. Clinton County - Area Plan, quoted and re-checked
9. Recommended Standards For Private Water Wells (Indiana statewide rule), quoted and re-checked
10. (2026 county census)
11. 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
12. Clinton County - Area Plan, quoted and re-checked
13. Clinton County - Area Plan, quoted and re-checked
14. Clinton County - Area Plan, quoted and re-checked
15. Rules of the Indiana Fire Prevention and Building Safety Commission, quoted and re-checked
16. Clinton County Area Plan Commission (clintonco.com)
17. Clinton County: Staff, quoted and re-checked
18. Clinton County building permit process and inspection guidance, quoted and re-checked
19. Clinton County Area Plan Commission, quoted and re-checked
20. Town of Rossville: § 151.01 Adoption by Reference (Clinton County), quoted and re-checked
21. Town of Kirklin: official source (Clinton County), quoted and re-checked
22. Clinton County Area Plan Commission, quoted and re-checked
23. Clinton County Area Plan Commission, quoted and re-checked
24. Plan Review FAQs (Indiana statewide rule), quoted and re-checked
25. 410 IAC 6-8.3 Residential On-Site Sewage Systems, quoted and re-checked
26. 410 IAC 6-8.3 Residential Onsite Sewage Systems, quoted and re-checked
27. 410 IAC 6-8.3 Residential On-Site Sewage Systems, quoted and re-checked
28. 410 IAC 6-8.3 Residential On-Site Sewage Systems, quoted and re-checked
29. Indiana Environmental Public Health Onsite Sewage Systems Program, quoted and re-checked
30. Environmental Public Health: 410 IAC 6-71 Campgrounds (Indiana statewide rule), quoted and re-checked
31. 410 IAC 6-8.3 Residential Onsite Sewage Systems, quoted and re-checked
32. Clinton County Health Department (in.gov)
33. INDOT Driveway Permit Guide 2024 (Indiana statewide rule), quoted and re-checked
34. Indiana Environmental Public Health Onsite Sewage Systems Program, quoted and re-checked
35. Share of land at 15% slope or less: Bolthole Index county data
36. Wooded share of land: Bolthole Index county data
37. Clinton County - Area Plan, quoted and re-checked
38. Water: Community Assistance & Information (Indiana statewide rule), quoted and re-checked
39. Water: Community Assistance & Information (Indiana statewide rule), quoted and re-checked
40. Effective property tax rate: Bolthole Index county data
41. Median property tax bill: Bolthole Index county data
42. Typical home value (Zillow): Bolthole Index county data

Written October 12, 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.