St. Louis County, Minnesota
Hermantown is a city in St. Louis County, Minnesota. Hermantown adopts its own zoning, so inside its limits Hermantown’s rules apply, not the county’s. Septic permits inside Hermantown come from St. Louis County (St. Louis County Onsite Wastewater Division · 218-471-7103). 10 rules below are quoted from official sources and independently re-checked, most recently on November 5, 2026. Rules for unincorporated land are on the St. Louis County page.
Buildings inside Hermantown city limits.
building-area exemption threshold: <= 200 square feet (Building must meet required side, rear, and front yard zoning setbacks.)
“Any building 200 square feet or smaller does not require a building permit.”
Homeowners performing their own construction work on their Hermantown property.
“Yes, however, you still need the appropriate zoning and building permits.”
All land within Hermantown city corporate limits.
“The geographic jurisdiction of this code includes the entire area within the corporate limits of the City.”
Subdivision plats inside Hermantown city limits.
““Plat, Final” means a drawing or map of a subdivision prepared in the manner required by MSA Ch. 505 and this Chapter, approved by the City Council and in such form as required by St. Louis County for the purpose of recording.”
Building permit applications inside Hermantown city limits.
“Permit applications will continue to be submitted and issued through the Cloud Permit Portal”
Hermantown does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Wetland District, unsewered portions inside Hermantown city limits.
minimum lot area: 80000 square feet (Unsewered Wetland District areas.) · minimum lot width at building line: 200 feet (Unsewered Wetland District areas.)
“Unsewered Areas. Aspect | Requirement Lot area | 80,000 Lot width at bldg. line (linear feet) | 200”
Wetland District, unsewered portions inside Hermantown city limits.
maximum total lot area covered by impervious surface: <= 30 percent (Wetland District unsewered areas.)
“Total lot area covered by impervious surface (%) 30”
Wetland District, unsewered portions inside Hermantown city limits.
building height limitation: <= 35 feet (Wetland District unsewered areas.)
“Building height limitation (linear feet) 35”
Construction in unsewered shoreland or wetland portions of Hermantown city limits.
“obtained from the St. Louis County Health Department”
Building construction in unsewered shoreland or wetland portions of Hermantown city limits.
“a sewage disposal permit and a certificate”
We looked and could not find an official answer yet. Silence is not permission; ask Hermantown or St. Louis County directly.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that Hermantown publishes no rule on the point, not that none exists. St. Louis County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Hermantown means bringing your own water and power. The kit we’d start with:
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