Off-Grid Living in Dearborn County, Indiana

I researched Dearborn County's off-grid rules by contacting and reviewing documents from the Planning Department, Health Department, and Building Department, plus town-level codes. Here's what I found - and crucially, what remains unconfirmed. The county is transparent about zoning, building codes, and septic systems. Everything else requires a phone call.

Zoning and Land Use: The Two-Layer System

Dearborn County maintains a countywide zoning ordinance that applies everywhere in unincorporated areas. This is your first filter. You cannot simply buy raw land and build; the county's zoning rules govern what uses are allowed, how dense development can be, and what setbacks apply.

The problem: individual towns layer additional requirements on top. Moores Hill, for example, requires you to obtain a Location Improvement Permit from the town *before* you submit your county building permit application. This two-step process means you must contact both jurisdictions, and the town's standards may be stricter than the county's.

I did not find published minimum lot sizes, density thresholds, or explicit off-grid-specific zoning rules in the available Dearborn County materials. This is a gap. Before you invest in land, contact the Dearborn County Planning Department and identify which town (if any) your property falls within, then call that town's building or planning office to learn the specific lot size, setback, and use requirements for your property. If you plan to build in unincorporated county land, the county ordinance applies directly; if your land is within a town boundary, confirm whether the town permit comes first.

Dwellings: Size Matters, Alternative Types Do Not

Manufactured homes in Dearborn County must be at least 950 square feet. This is a confirmed county standard. If you plan a factory-built structure, meet that threshold, and it will pass the baseline dwelling requirement.

Tiny homes on wheels (often called THOW structures) are not documented in county materials. Recreational vehicles (RVs) used as permanent dwellings are also absent from published rules. Indiana state law classifies tiny homes on wheels as RVs, and statewide they cannot legally be permanent residences outside campgrounds or mobile home parks - but Dearborn County's specific position on a tiny home on a foundation, or on alternative permanent structures, is not confirmed.

If you are considering a non-traditional structure - a small cottage on a permanent foundation that does not meet the manufactured-home definition, a geodesic dome, a cabin-style home, or any other custom design - call the town first (if your land is in one), then the Dearborn County Building Department. Ask whether your specific structure type qualifies as a "dwelling" under the county code and whether it must meet any minimum square footage or construction standards beyond the state residential code. Get written confirmation before breaking ground.

Building Permits and Codes: Indiana State Standard with Town Overlays

Dearborn County enforces Indiana's statewide residential code. The county accepts online building permit applications, which streamlines the process. I found no special local standards for tiny homes, off-grid construction methods, or alternative building techniques - meaning the Indiana state code is the baseline.

Your sequence: 1. Confirm zoning and town-level requirements with the Planning Department and town. 2. If your town requires a pre-county permit (like Moores Hill's Location Improvement Permit), obtain it. 3. Submit your building plans and permit application to the Dearborn County Building Department online or in person. 4. The county will review against the state code and local zoning.

Indiana's 2020 update to the state residential code recognized tiny home construction standards, which means the state framework is moving toward accommodating smaller structures - but county-level interpretation and enforcement vary. If you plan a tiny home or off-grid-specific feature (e.g., solar-integrated design, passive heating), describe it clearly on your permit application and ask the Building Department whether the state code's tiny home provisions apply to your design.

Septic Systems: Clear Rules, but Two-Site Testing for Subdivisions

This is the most transparent area. Dearborn County's septic rules are well-defined.

For subdivisions: If you are creating a new subdivision with a new Individual Sewage Disposal System (ISDS), you must show two test sites - primary and secondary locations - on the recorded plat before the county will approve the system. This is a site-planning requirement and ensures you have a backup disposal location if the primary site fails soil testing.

For single-family systems on existing property: You still need a permit from the Dearborn County Health Department, but the two-site plat requirement applies primarily to subdivisions. The Health Department will issue a septic permit once you provide soil test results and a system design approved by a licensed engineer. Indiana state law requires that septic systems be approved by either the state health department or the local county health department - in Dearborn County, this is the county Health Department.

One critical constraint: if your property is within 300 feet of a municipal sewer line (either Dearborn County's own lines or a town's system), the municipality can require you to connect to municipal sewer, even if your septic system is already legal. This is an Indiana statewide rule. Before you finalize septic design, confirm with the county whether your property is within any municipal sewer service area.

Composting toilets and alternative waste systems are not documented in county materials. If you plan to use a composting toilet, waterless urinal, or other non-traditional waste system - especially as an alternative to septic - contact the Health Department to ask whether it qualifies as a legal sewage disposal method and what design approval is needed.

Greywater Reuse: No County Rule Found

I found no Dearborn County ordinance explicitly allowing or prohibiting greywater reuse. Indiana state law also does not include a dedicated statute legalizing residential greywater reuse, though the state's adoption of the Indiana Residential Code (which incorporates appendices from the International Plumbing Code) may imply some allowance for certain greywater applications.

Reality check: the absence of a published rule does not mean greywater is legal. It means the county has not publicly stated its position.

To move forward: contact the Dearborn County Health Department and ask whether they permit greywater reuse for irrigation or toilet flushing, what design standards apply, whether you need a separate permit, and whether any piping or treatment requirements exist. Request a written response so you have documentation. If the Health Department defers to state law, ask them which state agency or code section governs greywater in Indiana, and follow that guidance.

Rainwater Harvesting: Permitted by State Law, but Confirm Locally

Indiana places no state-level restriction on rainwater harvesting. The 2020 Indiana Residential Code includes guidance for residential rainwater collection systems, which suggests the state permits it.

However, Dearborn County has not published any local rainwater ordinance or guidance that I found. This is another gap.

If you plan to collect rainwater for non-potable uses (irrigation, toilet flushing, or livestock water), call the Dearborn County Planning Department or Commissioners' office and confirm that rainwater harvesting is accepted and whether any system design or tank registration is required. Rainwater cannot legally be used for public potable water supplies in Indiana, but private collection for household or agricultural use is not restricted at the state level - the local confirmation is about whether the county will permit it in your specific zoning district and whether it affects your building or utility approvals.

Private Wells: State Doctrine Applies, Local Confirmation Required

Indiana operates under a "reasonable use" groundwater doctrine, meaning private wells are permitted. However, wells require a permit, and rules on casing depth, setbacks (typically 50 feet from septic systems and 100 feet from other contamination sources), and water quality testing are administered by the state and county health departments.

I found no specific Dearborn County rule on private well permitting in available materials. This is unconfirmed locally.

Before you drill: contact the Dearborn County Health Department and ask whether private wells are permitted in your zoning district, what permitting steps are required, what setback distances apply, what water quality testing is mandatory, and whether you need a licensed well contractor. Properties near municipal water service areas may face additional restrictions (similar to the 300-foot sewer rule), so ask whether your property is in a protected service area that requires connection to public water.

Utility Disconnection: Unclear at County Level

I found no Dearborn County documentation on whether you can legally disconnect from electrical service, natural gas, municipal water, or other utilities. Indiana state law does not require connection to the electrical grid, and solar installations do not increase a home's assessed property value for tax purposes - which is favorable. However, some counties and towns impose occupancy permit conditions that require utility hookups.

What to confirm: Contact the Dearborn County Planning Department and your town (if applicable) and ask: - Can you build a primary residence without connecting to public electrical service (e.g., solar-only)? - Are utility hookups a condition of your occupancy permit or certificate of occupancy? - If you disconnect from utilities after occupancy, does that trigger code violations or permit revocation? - If your property is near municipal sewer, does the 300-foot rule apply to your address?

The town-level answer may differ from the county's. Get written confirmation for your specific property before finalizing your off-grid system design.

Your Practical Next Steps

1. Identify the exact location: Confirm whether your land is in unincorporated Dearborn County or within a town boundary, and get the zoning classification.

2. Call the town first (if applicable): Obtain the town's specific zoning, density, and permit requirements. Ask whether a town permit is required before county submission.

3. Contact the Dearborn County Planning Department: Confirm zoning compliance, lot size, setbacks, and any off-grid-specific rules or gaps.

4. Contact the Dearborn County Health Department: Discuss septic design, soil testing, greywater, wells, and water quality standards.

5. Contact the Dearborn County Building Department: Confirm building code requirements, online permit procedures, and any special requirements for non-traditional structures.

6. Get written responses: Do not rely on phone conversations alone. Ask each office to email or mail a written summary of what is permitted and what is not, so you have documentation before you invest in land or engineering.

The county's transparency on zoning, building codes, and septic systems is a strength. The ambiguity around water systems and utility disconnection is a weakness - but it is not a barrier. It simply means you must ask before you commit.