St. Louis County, MN Building Setbacks & Zoning: Setback Rules (2026)

Ordinance 62's Section 3.2 Structural Setback Standards table sets the county's default property line setback at 10 feet for a principal structure and 5 feet for an accessory structure, figures that apply outside the more restrictive shoreland and river-corridor tables found later in Article III. The same table adds a shoreline setback of 75 feet for both principal and accessory structures where a lakeshore or riverfront setback applies by default, with a Shore Impact Zone, the strip closest to the water where development is most tightly limited, set at 37.5 feet for both structure classes.

Road setbacks are measured from the road centerline rather than the right-of-way edge: 110 feet on an Arterial road, 85 feet on a Collector, and 48 feet on a Local road, with no separate right-of-way-based figure listed. Section 3.1 makes clear these are minimum standards tied to whichever zone district and dimensional standard applies to a parcel from the Section 3.2 tables and Article V land use districts, and any structure that cannot meet them, short of a narrow 3-foot roofline overhang allowance that cannot interfere with a neighbor's solar access or drainage, needs a variance from the St.

Louis County Board of Adjustment before it can be built. Lakeshore and river setbacks in specific water body classifications, covering Natural Environment Lakes, Trout Streams, and the county's own Primitive, Remote and Urban River classes, are set separately in Section 3.4 and can run from 75 feet up to 300 feet depending on the water body, superseding the generic 75-foot figure where they apply.