Williams County, North Dakota
Twelve Mile Township is a township in Williams County, North Dakota. Septic permits inside Twelve Mile Township come from Twelve Mile Township. 3 rules below are quoted from official sources and independently re-checked, most recently on November 9, 2026. Rules for unincorporated land are on the Williams County page.
Twelve Mile Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Construction, enlargement, alteration, repair, moving, demolition, or occupancy change of a building or structure inside Twelve Mile Township under Williams County's permitting administration.
“A building permit is required before an individual intends to construct, enlarge, alter, repair, move, demolish, or change the occupancy of a building or structure.”
Land inside Twelve Mile Township, Williams County, where Williams County administers the zoning ordinance.
“Moved by Ramberg, seconded by Anderson approval with staff comments located in the N2N2SWSW Section 15 T154 R99 Twelve Mile Township with two conditions to adhere to 2015 Zoning Ordinance and Subdivision Regulations and provide a site plan for the proposed dwelling.”
Onsite septic systems inside Twelve Mile Township, which is within Williams County.
“The Upper Missouri District Health Unit is the agency with authority to permit septic systems and license installers in the four counties of Divide, McKenzie, Mountrail and Williams.”
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.
Off-grid gear
Going off-grid in Twelve Mile Township means bringing your own water and power. The kit we’d start with:
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