Zoning, building permits and septic rules in Prosper Township, South Dakota

Rules another office applies inside Prosper Township

Prosper Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

• Building permitRequired

  Permanent structures inside Prosper township, issued by the Davison County Planning & Zoning office (unincorporated area)

  • Permit must be started within 180 days or becomes void
  • Permit expires if not substantially completed within two years
  • Municipal permits are issued by the municipality for Ethan, Mt. Vernon and Mitchell and the Mitchell extraterritorial area
  • Fees vary by construction type

  “any permanent structures will require a building permit application prior to construction.”

• Local zoningPresent (with conditions)

  Land inside Prosper township, an unincorporated area of Davison County; zoning is the Davison County ordinance, since no township zoning ordinance was found

  • Ordinance excludes Ethan, Mt. Vernon and Mitchell; Mitchell exercises zoning in its extraterritorial jurisdiction
  • No Prosper township zoning ordinance was located; the township is not named as excluded
  • County ordinance was last amended June 8, 2021, effective July 3, 2021 per the county page

  “the provisions of this ordinance shall apply within the unincorporated areas of davison county, south dakota, to include loomis but excluding ethan, mt. vernon, and mitchell.”

• Who permits septicMixed (with conditions)

  Septic systems inside Prosper township: county zoning ordinance adds siting rules and state DANR rules (ARSD 74:53:01) apply

  • Individual systems prohibited within 350 feet of a lake, river or stream classified as a drinking water supply; conditional use between 350 and 660 feet
  • Soil percolation documentation may be required
  • No county health department septic permit page was opened

  setback from drinking-water-supply surface water, prohibited: < 350 feet (conditional use 350-660 feet)

  “all individual sewage treatment systems shall be prohibited when any portion of the system is located less than three hundred and fifty (350) feet of a lake, river, or stream classified as a local or downstream public drinking water supply.”

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.