Bloomington, IN Accessory Structures: ADU Rules (2026)

030(g)(5), an Accessory Use available in most of the City of Bloomington's residential and mixed-use districts per Table 03-1 (Allowed Use Table). 030(g)(5)(B), sets the baseline: an ADU has to be accessory to a single-family or duplex dwelling that is the principal use on the same lot, only one ADU is allowed per lot, and an ADU cannot contain more than two bedrooms. 030(g)(5)(D), matches the primary dwelling's maximum height, and has to meet the same setback the primary dwelling meets in its zoning district.

030(g), whichever is less, cannot exceed twenty-five feet in height, cannot extend closer to the street than the existing primary dwelling, and must sit back at least five feet from any side or rear property line. 030(g)(5)(C), unless the primary dwelling already uses a septic system permitted under Monroe County Health Department standards. 030(g)(5)(H), a deed or title restriction recorded with the Monroe County Recorder barring the ADU from being sold separately from the primary unit. Any unit used as a rental has to register with the Department of Housing and Neighborhood Development (HAND).