Building permits, zoning and land rules in Dearborn County, Indiana

Yes. Construction subject to Dearborn County building regulations cannot begin until the Building Commissioner has issued a valid building permit¹. The Dearborn County Building Department helps applicants with codes and the permitting process and provides an online application portal². Indiana's statewide rules include the Indiana Building Code and the Indiana Residential Code, while local jurisdictions retain authority to require building permits, plan review and inspections^11,12. For one- and two-family dwellings, the 2020 Indiana Residential Code has been in effect since December 26, 2019¹¹. A building used only for an agricultural purpose on the land where it sits, and not used for retail, is exempt from Indiana's state Class 1 design-release classification, but the available sources do not confirm a Dearborn County exemption from local building-permit or zoning requirements¹³.

The Dearborn County Building Department handles the county's building-code and building-permit process². Reach the office at 165 Mary St in Lawrenceburg, Indiana, or by phone at (812) 537-8822². The county also provides an online Citizen Portal for building permit applications². Zoning questions go separately to the Department of Planning & Zoning at the same 165 Mary St address, reachable at (812) 537-8821^3,14. Onsite sewage questions and septic inspection scheduling go to the Environmental Health Division of the Dearborn County Health Department, also at 165 Mary St, at (812) 537-8841^5,15.

Yes: Dearborn County has an adopted Zoning Ordinance administered by the Department of Planning & Zoning and the Plan Commission³. The county's planning map publishes a county zoning layer separately from municipal zoning layers for Aurora, Dillsboro, St. Leon, and West Harrison, so use the layer for the jurisdiction where the parcel actually lies⁴. The county's official zoning layer shows agricultural, residential, restricted business, general business, highway interchange and three manufacturing districts, so the parcel's district decides which uses and standards apply³. The county published proposed Article 19 amendments for solar energy systems that would apply throughout unincorporated Dearborn County, with a possible vote scheduled for September 28, 2026; we could not confirm the outcome, so contact Planning & Zoning for the current solar standards¹⁴. For other projects, ask Planning & Zoning to identify the parcel's district and the uses and development standards that apply before designing the site³. Subdividing land outside a municipality requires a plat recorded with the county recorder and the approval required under Indiana's subdivision process¹⁶.

Start an onsite sewage proposal with the Environmental Health Division of the Dearborn County Health Department, which provides septic-system information and schedules inspections^5,15. Indiana's onsite sewage rules are administered by local boards of health subject to state review, and Dearborn County has a local onsite sewage ordinance approved by the state Technical Review Panel^17,18. The available material does not state the Dearborn-specific septic permit trigger, so ask Environmental Health what approval, site evaluation and inspections the parcel requires⁵. Drywells and cesspools cannot be used for onsite sewage treatment in Dearborn County⁶. USDA soil data rates only about 0.5% of Dearborn County soils as free of severe limits for a conventional drain field, so make septic feasibility a purchase contingency¹⁰. If sanitary sewer is available within a reasonable distance, onsite sewage disposal is prohibited and the facility must connect to sewer⁶. The Dearborn County Regional Sewer District covers unincorporated areas not served by municipal providers or the South Dearborn Regional Sewer District, so verify the parcel's provider and sewer availability before designing an onsite system¹⁹.

Indiana's campground rule governs recreational vehicles at regulated campgrounds; it does not answer whether an owner may live in an RV on a private Dearborn County parcel²⁰. We could not confirm Dearborn County's rules for long-term RV occupancy, temporary camping, tiny homes or minimum dwelling size, so ask Planning & Zoning about the parcel's district and proposed use before buying or moving a unit onsite^3,14. Wastewater is a separate constraint: drywells and cesspools are prohibited, and a facility must connect to sanitary sewer instead of installing an onsite system when sewer is available within a reasonable distance⁶. For land without available sewer, ask the Health Department's Environmental Health Division what onsite sewage approval and inspections the proposed dwelling requires^5,15.

1. Confirm the parcel's jurisdiction and zoning district with the Department of Planning & Zoning, including whether current solar standards affect the plan^4,14.
2. Ask the Health Department's Environmental Health Division whether sanitary sewer is available; if it is available within a reasonable distance, the facility must connect rather than install an onsite system^6,15.
3. If sewer is unavailable, ask Environmental Health what onsite sewage approval, site evaluation and inspections are required before site work^5,15.
4. For a new well, ask the Health Department whether Dearborn County requires a local well-construction or pump-installation permit⁹.
5. Apply for a Highway Department driveway permit before installing a new driveway or changing an existing driveway's use; the application fee is $25⁷.
6. Submit the building permit application to the Building Department, in person or through its online portal, before construction begins^1,2.
7. Ask the Building Department which inspections apply and when to schedule them; the available sources do not establish the inspection stages².

Zoning: confirm the parcel's zoning district with Planning & Zoning, and if solar is part of your plan, ask whether the Article 19 solar amendments were adopted before you assume today's rules will still apply^3,14. Septic: with only about 0.5% of the county's soils rated free of severe limits for a conventional drain field, treat a passing septic site evaluation as a must-have contingency before you close^10,15. Water: ask the Health Department directly whether Dearborn County requires a local well permit, since Indiana law leaves that decision to individual counties rather than publishing a statewide list⁹. Access: a new or changed-use driveway needs a $25 Highway Department permit and must meet 185-foot spacing from other driveways on major roads, 280 feet of sight distance, and a 24-foot maximum width, and it cannot drain toward the road⁷. Flood: the DNR Division of Water has jurisdiction over most floodway development, such as fills, excavations, utilities and non-residential structures, while fringe areas get no state permit but community and federal flood-insurance rules may apply²¹. We could not confirm a separate Dearborn County floodplain administrator, so ask Planning & Zoning who handles local floodplain review^14,21. Taxes: Dearborn County's effective property tax rate runs about 0.8%, with a median annual bill near $1,726¹⁰.