Building permits, zoning and septic rules 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 permits¹. 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 area¹, including the Indiana residential code applicable to one- and two-family dwellings¹⁰. We could not confirm an owner-builder exemption, so ask the Area Plan Commission before doing your own work⁸.

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 765-659-6302¹. The commission serves unincorporated Clinton County, Mulberry, Rossville, Kirklin and Colfax¹. Inside Frankfort, obtain the city's building permit from the Building Inspector before construction begins; septic permitting remains a Health Department responsibility^2,4. Start the commission's digital building-permit process by emailing project details to its staff¹. 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 concrete¹.

The Area Plan Commission administers zoning in unincorporated Clinton County and serves Mulberry, Rossville, Kirklin and Colfax¹. Frankfort has its own zoning code, while Rossville and Kirklin adopt the county Unified Development Ordinance into their town codes^3,11,12. Residential septic permits remain with the Clinton County Health Department; Mulberry also requires a town private sewage disposal permit and inspection^4,5. Obtain the official county ordinance from the commission rather than relying on its downloadable convenience copy¹. 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 subdivisions¹. Indiana's agricultural design-release exemption does not itself establish an exemption from local zoning approval or building inspections¹³.

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 programs^4,14. Inside Mulberry, the town Superintendent also issues a private sewage disposal permit and inspection, with additional County Health Department requirements possible⁵. 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 plans⁶. Only 1.4% of Clinton County soils are rated not limited for conventional drain fields; that makes site evaluation essential, not septic impossible⁹. 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 work¹⁵. Installation must satisfy the health officer before permit requirements are fulfilled¹⁴. 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 standards¹⁴. Drywells and cesspools are prohibited¹⁶.

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 authority¹. Indiana's campground rule does not answer private-lot occupancy because it applies to regulated campgrounds and distinguishes individually deeded lots¹⁷. A tiny home used as a dwelling still faces the building-permit process and applicable residential code in the commission's service area¹. 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 system^4,6.

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 zoning^1,2,3.
2. Obtain the official county zoning ordinance from the commission for land under its rules¹.
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 permit^4,5,6.
4. Ask the Health Department whether a well-construction permit is required before drilling^7,18.
5. Email project details to the Area Plan Commission to start its digital building-permit process¹.
6. Prepay building inspections, give 24-hour notice and obtain required inspections before concrete is poured¹.
7. Obtain an INDOT driveway permit before building access onto a state highway¹⁹.

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 impossible⁹. Determine whether sanitary sewer is available within a reasonable distance, because availability would require a sewer connection instead of a new onsite system¹⁶. About 99.3% of the county is at 15% slope or less and 6% is wooded, so many parcels will be open and nearly level⁹. Confirm the parcel's district and obtain the official zoning standards from the Area Plan Commission before buying¹. For a tract split from a larger parcel, verify that any required minor or major subdivision approvals were completed¹. 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 approval²⁰. The effective property-tax rate is about 0.6%, with a median annual bill near $979 and a typical home value near $230,242⁹.