Evansville's Accessory Structures: The Rules That Matter

Every city handles accessory structures a little differently. In Evansville, Indiana, there are 3 distinct rules that residents and property owners should be aware of. Some are stricter than what neighboring cities enforce, and others are more relaxed. Here is what you need to know.

ADU Owner Occupancy

Evansville requires the owner of a lot with an accessory dwelling unit to live in either the principal home or the ADU, backed by a recorded deed restriction.

Key details: Governing section: EMC § 18.130.072(B)(6). Occupancy rule: Owner must occupy principal home or ADU. Proof required: Recorded deed/title restriction, county Recorder. Enforcement: Permit revocation, ADU removal for violation. Administered by: Evansville-Vanderburgh Area Plan Commission.

Violating the owner-occupancy deed restriction leads the City to revoke the ADU's improvement location permit and require removal of the ADU, including its kitchen and related facilities.

Shed & Carport Rules

Evansville requires detached sheds and other residential accessory structures to sit at least two feet from any side or rear lot line and stay smaller than the main house.

Key details: Detached shed setback: 2 feet from lot line. Size rule: subordinate to main house. Timing rule: can't predate the house. Permit needed: improvement location permit.

A shed built closer than two feet to a lot line, or erected before the house exists, is a Title 18 violation the Area Plan Commission can require corrected through an improvement location permit hold.

ADU Rules

Evansville allows one accessory dwelling unit per single-family or duplex lot, sized between 400 and 800 square feet, only on lots of at least 5,000 square feet.

Key details: Floor area: 400–800 sq ft. Minimum lot size: 5,000 sq ft. Rear setback: 10 feet minimum. Lot coverage bonus: up to +10%. Limit: 1 ADU per lot.

Exceeding the 800-square-foot cap, building on an undersized lot, or adding a second ADU is a Title 18 violation that can block issuance of the improvement location permit.

The Bottom Line

Evansville's accessory structures rules are a mixed bag. Some areas are strict, others are relaxed, and the details matter. The best approach is to check the specific rule that applies to your situation rather than assuming Evansville is broadly strict or permissive.

This guide is based on Evansville's current municipal code. Local rules can and do change, so check the individual ordinance pages for the latest details, penalties, and FAQs.