Zoning, building permits and septic rules in Town of Clay Banks, Wisconsin

Town of Clay Banks’s own rules

• Building permitRequired

  Building work inside Clay Banks town.

  • The town directs applicants to contact both Door County Planning Department and Inspection Specialists to obtain proper permits.

  “You must contact both parties to obtain proper permits.”

• Building code adoptedAdopted (with conditions)

  Residential and commercial construction inside Clay Banks town.

  • The county plan identifies the Uniform Dwelling Code as chapters 320-325, Wis. Admin. Code.

  “All municipalities in Door County have adopted the state’s Uniform Dwelling code (UDC)”

Rules another office applies inside Town of Clay Banks

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

• Zoning districtsPublished (with conditions)

  Clay Banks town, where the Door County Comprehensive Zoning Ordinance is in effect.

  • District boundaries are defined by Door County zoning maps prepared for each town.

  “This ordinance is in effect in nine of the fourteen towns: Baileys Harbor, Clay Banks, Forestville, Gibraltar, Jacksonport, Liberty Grove, Sevastopol, Sturgeon Bay, and Washington.”

• Minimum lot sizeDistrict specific (with conditions)

  New lots in the Exclusive Agricultural (EA) district in Clay Banks town, if mapped EA.

  • The specific parcel must be mapped EA; the county zoning maps define district boundaries.

  minimum new-lot size: >= 35 acres (Exclusive Agricultural district)

  “Lot sizes of at least 35 acres are required for new lots.”

  One more reviewed finding on this topic

  • District specific (with conditions) — New lots in the Single Family Residential-20,000 (SF20) district in Clay Banks town, if mapped SF20 and not served by public sewer.

    “Lot sizes of at least 20,000 square feet are required for new lots not served by public sewer.”

• Who permits septicCounty (with conditions)

  Private onsite wastewater treatment systems in unsewered areas inside Clay Banks town.

  • County POWTS regulations are derived from state administrative code.

  “The Sanitarian office administers the county’s Private Onsite Wastewater Treatment System (POWTS) regulations”

• Septic permitRequired

  New projects in Clay Banks town requiring a private onsite wastewater treatment system.

  • The sanitary permit must issue before the county zoning permit may issue.

  “A sanitary permit shall be issued [...] before a zoning permit may be issued.”

• Subdividing landRegulated (with conditions)

  Land divisions inside Clay Banks town.

  • The county land-division ordinance applies in all 14 towns.
  • Activities may be exempt, but all divisions into new lots under 10 acres are reviewed.

  new-lot review threshold: < 10 acres (Some activities are exempt)

  “This ordinance is administered by the Door County Resources Planning Committee and Door County LUS staff and is in effect in all 14 towns. Although some activities are exempt, all divisions of land into new lots of less than 10 acres in size are reviewed under this ordinance.”

• Building in a floodplainRequired

  Development in regulated flood-hazard areas inside Clay Banks town.

  • The ordinance regulates mapped special flood hazard zones and certain DNR-approved mapped areas.
  • The cited ordinance is effective September 25, 2025.

  “Failure to obtain a floodplain development permit shall be a violation of these regulations”

• Short-term rentalsLimited

  Detached accessory residence dwelling units in Clay Banks town where county comprehensive zoning applies.

  • This restriction is limited to accessory residences; this research does not establish a general townwide short-term-rental rule.

  “No accessory residence shall be converted [...] to a short-term, transient rental.”

• Permit processPublished (with conditions)

  County zoning permits for projects in Clay Banks town subject to county comprehensive zoning.

  • Additional requirements will most likely apply in shoreland or floodplain jurisdiction.
  • A zoning permit is valid for one year; after expiration, a new application is required unless substantial work is completed and renewal is sought before expiration.

  zoning permit validity: 1 year (Renewal application may be sought before expiration if substantial work has been completed)

  “A zoning permit is only valid for one year”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Town of Clay Banks or Door County directly.

• Owner-builder exemption — Owner-built residential construction inside Clay Banks town.
• Inspections — Building inspections inside Clay Banks town.
• Certificate of occupancy — New or altered structures inside Clay Banks town.
• Local zoning — Whether Clay Banks town itself has adopted and administers a zoning ordinance.
• Minimum dwelling size — Principal single-family dwellings in Clay Banks town.

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.