Dubuque, IA Building Setbacks & Zoning: Setback Rules (2026)

Section 16-5-2-7's Bulk Regulations table lists, for a single-family detached dwelling in R-1, a front setback of 20 feet minimum and 50 feet maximum, a 6-foot minimum side setback, and a 20-foot minimum rear setback, alongside a 5,000 square foot minimum lot area and 40 percent maximum lot coverage. The table flags the front setback minimum with a footnote pointing to section 16-3-17, which lets the city planner adjust the required front setback on interior lots where abutting dwellings already sit closer to the street than the district minimum, averaging the required setback with the two neighboring setbacks, and applies a similar averaging rule for corner lots as long as the required visibility triangle is maintained.

In no event, under that same section, can a structure extend beyond the front property line. Section 16-3-7-2 separately ties accessory structure setbacks to these same district figures: accessory buildings use the same side setback required for the principal use, with a flat 6-foot rear setback citywide unless the smaller-shed exception applies.