Bolthole Index

Codington County, South Dakota

Zoning, building permits and septic rules in Watertown, South Dakota

Watertown is a city in Codington County, South Dakota. Watertown adopts its own zoning, so inside its limits Watertown’s rules apply, not the county’s. 3 rules below are quoted from official sources and independently re-checked, most recently on November 12, 2026. Rules for unincorporated land are on the Codington County page.

Answers from the rulebook for Watertown

Watertown’s own rules

  • Building code adoptedAdopted (with conditions)

    Residential construction inside Watertown city limits

    • Adopted with local modifications (Ord 26-18, rev 8-14-26)
    • Chapters 1-23 and 43 and appendices H and J only
    • IRC section R103 department of building safety deleted; R110 certificate of occupancy deleted; appeals go to the Board of Adjustment

    code edition: International Residential Code 2024 (local amendments)

    “that certain building code known as the international residential code 2024 edition, chapters 1-23 and 43, and appendices h and j, subject to the following modifications (ord 26-18; rev 8-14-26)”
  • Local zoningPresent (with conditions)

    Land inside Watertown city limits (Codington County, SD)

    • Title 21 of the city's Revised Ordinances is the zoning title; Board of Adjustment has jurisdiction within the corporate limits
    • A separate joint city/county zoning ordinance covers the area outside city limits (not verified here)
    “the city board of adjustment shall have jurisdiction in all the territory within the corporate limits of the city of watertown, south dakota.”
  • Minimum lot sizeSpecified

    R-1 Single Family Residential District, Watertown city

    • Table text is garbled in extraction; R-1 single-family row reads 9,000 sf lot area, 75' lot width, 4.84 dwelling units per acre
    • Other districts (R-1C, R-2, A-1 etc.) have different values

    minimum lot area, single-family: >= 9000 sq ft · minimum lot width: >= 75 ft

    “r-1 single family residential district minimum density (sf/d.u.) dwellin g unit / acre single-family 9,000 4.84 9,000 75' na na 9,000 75' other allowable uses cu”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Watertown or Codington County directly.

  • Owner-builder exemption — Owner-built homes inside Watertown city limits
  • Inspections — Residential construction inside Watertown city limits
  • Zoning districts — Inside Watertown city limits
  • Minimum dwelling size — Inside Watertown city limits
  • Setbacks — R-1 district, Watertown city
20 more unanswered
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Manufactured homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Building in a floodplain
  • Short-term rentals
  • Permit fees
  • Permit process

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 Watertown publishes no rule on the point, not that none exists. Codington County’s page lists the county offices to call.

Off-grid gear

Going off-grid in Watertown means bringing your own water and power. The kit we’d start with:

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

← All of Codington County: county rules, score and offices