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

At a glance

Building permit

Required before construction subject to county building regulations¹

Zoning

Yes, countywide Zoning Ordinance³

Septic authority

Dearborn County Health Department, Environmental Health Division⁵

Sewer connection

Required when sanitary sewer is available within a reasonable distance⁷

Driveway permit fee

$25, from the Highway Department⁸

Owner-builder exemption

Not confirmed on county pages; ask the Building Department⁹

Well permit

Depends on the local health department; not published for Dearborn County specifically¹⁰

Septic soils

Only about 0.5% rated free of severe limits for a standard drain field¹¹

Who to call

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

Do you need a building permit 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 inspections¹²¹³. For one- and two-family dwellings, the 2020 Indiana Residential Code has been in effect since December 26, 2019¹⁴. 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 requirements¹⁵.

Who is the Dearborn County building department, and how do you reach them?

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) 537-8821¹⁶³. 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) 537-8841⁵¹⁷.

Does Dearborn County have zoning?

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 apply¹⁸¹⁹. 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 standards¹⁶. 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 process²⁰.

How do septic permits work in Dearborn County?

Start an onsite sewage proposal with the Environmental Health Division of the Dearborn County Health Department, which provides septic-system information and schedules inspections⁵¹⁷. 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 Panel²¹²². 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 County²³. 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 contingency¹¹. If sanitary sewer is available within a reasonable distance, onsite sewage disposal is prohibited and the facility must connect to sewer⁷. 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 system²⁴.

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

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 parcel²⁵. 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 onsite³¹⁶. 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 distance²³⁶. For land without available sewer, ask the Health Department's Environmental Health Division what onsite sewage approval and inspections the proposed dwelling requires⁵¹⁷.

How do you build a home in Dearborn County, Indiana, step by step?

1. Confirm the parcel's jurisdiction and zoning district with the Department of Planning & Zoning, including whether current solar standards affect the plan⁴¹⁶.
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 system⁶¹⁷.
3. If sewer is unavailable, ask Environmental Health what onsite sewage approval, site evaluation and inspections are required before site work⁵¹⁷.
4. For a new well, ask the Health Department whether Dearborn County requires a local well-construction or pump-installation permit¹⁰.
5. Apply for a Highway Department driveway permit before installing a new driveway or changing an existing driveway's use; the application fee is $25⁸.
6. Submit the building permit application to the Building Department, in person or through its online portal, before construction begins¹².
7. Ask the Building Department which inspections apply and when to schedule them; the available sources do not establish the inspection stages².

What should you check before buying land in Dearborn County, Indiana?

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 apply¹⁶³. 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 close¹¹¹⁷. 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 list¹⁰. 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 road⁸. 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 apply²⁶. We could not confirm a separate Dearborn County floodplain administrator, so ask Planning & Zoning who handles local floodplain review²⁷¹⁶. Taxes: Dearborn County's effective property tax rate runs about 0.8%, with a median annual bill near $1,726²⁸²⁹.

Watch-outs

• Dearborn County published proposed Article 19 solar-energy amendments with a possible vote scheduled for September 28, 2026, but the verified office page does not state the outcome; confirm the current rule with Planning & Zoning before planning a solar project¹⁶.
• This guide could not confirm which Dearborn County office serves as the local floodplain administrator; Indiana requires a local floodplain permit in addition to the state DNR permit, so ask Planning & Zoning who handles it before you build in a mapped floodplain²⁷¹⁶.
• No owner-builder permit exemption was found on Dearborn County's official pages; do not assume you can skip a licensed contractor requirement without checking with the Building Department first⁹.
• No Dearborn County page addresses RV or tiny-home occupancy on private land directly; confirm with Planning & Zoning before relying on either for a permanent residence¹⁶.

Sources

1. § 150.08 Building Permit Required, quoted and re-checked
2. Dearborn County Building Department (dearborncounty.org)
3. Layer: County Zoning (2026 county census)
4. Planning/ZoningMap, quoted and re-checked
5. Dearborn County Health Department Environmental Health, quoted and re-checked
6. Environmental Public Health: Onsite Sewage Systems Program, quoted and re-checked
7. Onsite Sewage Systems Program, quoted and re-checked
8. Dearborn County Highway Department (dearborncounty.org)
9. (2026 county census)
10. Recommended Standards For Private Water Wells (Indiana statewide rule), quoted and re-checked
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. DHS: Rules of the Indiana Fire Prevention and Building Safety Commission, quoted and re-checked
13. in.gov (Indiana statewide rule), quoted and re-checked
14. DHS: Rules of the Indiana Fire Prevention and Building Safety Commission, quoted and re-checked
15. Plan Review FAQs (Indiana statewide rule), quoted and re-checked
16. Dearborn County Department of Planning & Zoning (dearborncounty.org)
17. Dearborn County Health Department, Environmental Health Division (dearborncounty.org)
18. Layer: County Zoning, quoted and re-checked
19. Layer: County Zoning, quoted and re-checked
20. 2023 County Recorders Resource Library (Indiana statewide rule), quoted and re-checked
21. 410 IAC 6-8.3 Residential On-Site Sewage Systems (Indiana statewide rule), quoted and re-checked
22. Onsite Sewage Systems Program, quoted and re-checked
23. Environmental Public Health: Onsite Sewage Systems Program, quoted and re-checked
24. Water Quality in Indiana: Regional Water and Sewer Districts, quoted and re-checked
25. Environmental Public Health: 410 IAC 6-71 Campgrounds (Indiana statewide rule), quoted and re-checked
26. Water: Community Assistance & Information, quoted and re-checked
27. Water: Community Assistance & Information (Indiana statewide rule), quoted and re-checked
28. Effective property tax rate: Bolthole Index county data
29. Median property tax bill: Bolthole Index county data

Written October 10, 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.