Zoning, building permits and septic rules in Town of Sullivan, Wisconsin

Town of Sullivan’s own rules

• Building permitRequired

  Inside Sullivan town: all new one and two family and all new multifamily dwellings; residential additions or remodels valued at $20,000 or more; residential accessory structures of 1,000 sq ft or more; all new commercial/industrial projects; all electrical services, new or upgraded

  • Agricultural use buildings are excluded from the accessory-structure permit requirement.
  • Building, electrical and plumbing permits are handled through the building inspectors at Wisconsin Inspection Agency, LLC (town FAQ).
  • Work started without a permit carries double fees.

  residential remodel or addition valuation threshold: >= 20000 USD · residential accessory structure floor area threshold: >= 1000 sq ft (agricultural use buildings excluded)

  “all new one and two family, and all new multifamily dwellings”

• Mandatory utility hookupConditional

  Land inside Sullivan town that lies within the Town of Sullivan Sanitary District No. 1

  • Sanitary District approval must be obtained before permits are issued for property located within the district (subdivision ordinance sec. 16.03).
  • A general mandatory-connection rule for new homes was not found in the sources reviewed; land outside the district is not covered by this claim.
  • Sewer permits are obtained through the sanitary district deputy clerk (town FAQ).

  “approval by the town of sullivan sanitary district #1 shall be obtained before any permits are issued if property is located within a district.”

• Agricultural exemptionConditional

  Agricultural use buildings inside Sullivan town, excluded from the residential accessory-structure building permit requirement

  • This is a building-permit exclusion for agricultural use buildings; the sheet does not define 'ag use' and it is not a farmland or agricultural-zoning exemption.
  • Residential accessory structures under 1,000 sq ft do not appear on the sheet's permit list.

  residential accessory structure floor area threshold: >= 1000 sq ft (agricultural use buildings excluded from permit)

  “all residential accessory structures 1,000 sq.ft. or larger (total floor area) o no permits for ag use buildings”

• Subdividing landRegulated (with conditions)

  Division of land inside Sullivan town into subdivisions (five or more parcels or building sites of 5 acres or less, or successive divisions within 5 years)

  • Division by subdivision plat requires Town Board preliminary and final plat approval under the ordinance procedure (secs. 16.05-16.06).
  • Exempt: transfer of interest by will or court order; sale or exchange between adjoining owners that creates no additional lots and does not reduce lots below required minimums.
  • Any division other than a subdivision must be surveyed as provided in Wis. Stat. sec. 236.34.
  • No building permit is issued for a parcel not on record as of the ordinance effective date until the ordinance requirements are met.

  parcels or building sites created in a single division: >= 5 parcels (each 5 acres or less in area; or created by successive divisions within 5 years)

  “no land within the limits of the town shall, after the adoption of this ordinance, be divided by a subdivision plat”

Still unanswered

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

• Owner-builder exemption — Owner-builder construction inside Sullivan town
• Building code adopted — Construction inside Sullivan town - which building code the town applies
• Certificate of occupancy — New dwellings inside Sullivan town - occupancy approval
• Local zoning — Land inside Sullivan town (Town of Sullivan, Jefferson County, WI) - whether the town adopts and administers its own zoning ordinance
• Zoning districts — Zoning districts inside Sullivan 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.