St. Louis County, MN Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Coverage definition
- structures + all impervious surfaces
- Largest-lot districts (1-3a)
- 10% max coverage
- Mid-size districts (4-11)
- 25% max coverage
- Smallest-lot District 12
- 35% max coverage
- Plat of Soudan (sewer only/both)
- 35% max coverage either way
Summary
St. Louis County's zoning districts cap total lot coverage, meaning every structure plus every constructed impervious surface, at 10 to 35 percent of lot area depending on the district, with the smallest-lot Plat of Soudan parcels fixed at 35 percent regardless of sewer service.
Lot Coverage - Lot coverage shall include all structures and constructed impervious surfaces. ... SPECIAL STANDARDS FOR THE PLAT OF SOUDAN, TOWN OF BREITUNG Dimensional Standards Sewer Only Sewer and Water 0.33 acre 0.16 acre Minimum lot area 100 feet 60 feet Minimum lot width 35% 35% Maximum lot coverage
Full Breakdown
7 to include all structures and constructed impervious surfaces, meaning a homeowner cannot dodge the cap by counting only a building footprint; driveways, patios and parking areas all count. 2's Lot Dimension Tables assign every one of the county's numbered zone districts a Max Lot Coverage percentage tied to that district's minimum lot size: the county's largest-lot districts, Districts 1, 1a, 2, 3 and 3a, which require anywhere from 9 to 35 acres per lot, cap coverage at 10 percent. 5-acre minimum, allow 25 percent coverage.
16 acre minimum) are capped at 35 percent lot coverage. As with the setback standards in the same Article, any proposal that would exceed the coverage percentage assigned to its district, once that district is placed on the Official Zoning Map, requires a variance from the St. Louis County Board of Adjustment rather than an administrative waiver.
Violations & Fines
Exceeding the district's maximum lot coverage percentage without an approved variance is a Section 3.1 dimensional standards violation, enforced the same way as a setback violation: the Director investigates, issues a correction order, and refers noncompliance to the County Attorney under Section 8.2. A person who builds past the coverage cap and refuses to correct it is guilty of a misdemeanor, with fines paid into the county's general revenue fund, and the County Board can pursue injunctive relief to force removal of the excess impervious area.
Frequently Asked Questions
What counts toward the lot coverage limit in St. Louis County, MN?
What is the maximum lot coverage on a typical rural parcel?
Is the Plat of Soudan treated differently for lot coverage?
Sources & Official References
Other rules in St. Louis County
Compare St. Louis County to another location·View the Minnesota building setbacks & zoning overview
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