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

Town of Troy’s own rules

• Building permitRequired

  Construction inside Troy town's limits

  • The town's forms page says building permits are handled directly by the town's building inspector, Brian Wert, through his own site (inspection agency).
  • Sanitary permits from St. Croix County are a separate prerequisite for septic work per the county page.

  “building permits: are required in the town of troy. they are handled directly by the town's building inspector, brian wert.”

• Local zoningPresent (with conditions)

  Land inside Troy town's limits (Troy town, St. Croix County, WI). Troy town administers its own zoning ordinance, Chapter 170.

  • The town's zoning ordinance was updated in 2022 per its PDF file name; the adoption date is not stated in the excerpt reviewed.
  • Town zoning is organized as a set of districts; use requires the district rules in Chapter 170.

  “for the purpose of this chapter, present and future provision is hereby made for the division of the town of troy into the following zoning districts”

• Zoning districtsPublished (with conditions)

  Zoning districts inside Troy town

  • Districts include TR-RES, AG-RES, AG, C, MH, TR-COM, LECR, COM-OP/MC, COM-GR/S, COM-TC, COM-LTD, I, and FP overlay, per Chapter 170 section 170-c.

  “for the purpose of this chapter, present and future provision is hereby made for the division of the town of troy into the following zoning districts”

• Minimum lot sizeSpecified

  Traditional Residential district (TR-RES) lots inside Troy town

  • Future subdivision of previously platted lots must comply with the town subdivision ordinance as if zoned ag-residential.

  minimum lot area: >= 1 acre

  “a) minimum lot area (1) one acre b) minimum setback. (1) front yard: forty (40).”

  One more reviewed finding on this topic

  • Specified — Exclusive Agricultural district (AG) lots inside Troy town

    “a) minimum lot area 35 acres b) minimum setback (1) front yard: one hundred (100) feet from right-of-way to building line.”

• SetbacksSpecified

  Principal residential structures in the Traditional Residential district (TR-RES) inside Troy town

  • The source writes the front and side values as 'forty (40)' and 'fifteen (15) feet'; the front-yard unit is inferred from the sentence pattern.
  • Rear yard is 25 feet from the principal structure and 5 feet from accessory buildings.

  front yard setback: 40 feet (unit written only as 'forty (40)' in the source sentence) · side yard setback: 15 feet · rear yard setback (principal): 25 feet · rear yard setback (accessory): 5 feet

  “b) minimum setback. (1) front yard: forty (40). (2) side yard: fifteen (15) feet from property boundary to the building line.”

  One more reviewed finding on this topic

  • Specified — Exclusive Agricultural district (AG) inside Troy town

    “(3) rear yard: fifty (50) feet from property boundary to building line. (4) livestock facilities, structures and other buildings for the housing of livestock or poultry are separately and additionally subject to the setback requirements of subsection 2 of this section”

• Lot coverageDistrict specific (with conditions)

  One commercial district inside Troy town; the excerpt appears in the section immediately before section 170-j (the traditional commercial district, section 170-i, by page sequence). The district name is inferred from page order, not stated in the excerpt.

  • Impervious hard surface may not exceed 20% of the lot in that district.
  • Residential districts' lot coverage was not located in the excerpts reviewed.

  maximum impervious hard surface coverage: <= 20 percent of lot

  “d) maximum hard surface lot coverage: impervious hard surface shall not exceed 20% of the lot.”

• Building heightSpecified

  Principal residential structures in the Traditional Residential district (TR-RES) inside Troy town

  • TR-RES covers the platted residential area zoned residential by St. Croix County before Chapter 170 took effect.

  maximum building height: <= 35 feet

  “rear yard: twenty-five (25) feet from property boundary to the building line of the principal residential structure and five (5) feet from any accessory building. d) maximum height (1) 35 feet”

  2 more reviewed findings on this topic

  • Specified — Principal residence and accessory buildings in the Exclusive Agricultural district (AG) inside Troy town (silos excepted)

    “principal residence and accessory buildings except silos – forty- five (45) feet.”

  • Specified — One commercial district inside Troy town (the district whose standards appear before section 170-j; inferred name traditional commercial, section 170-i)

    “area setback and height requirements. a) minimum lot area. lots shall have a minimum of two acres. b) minimum setback, new construction: (1) front yard: 150 feet (2) side yard: 50 feet (3) rear yard: 50 feet c) maximum height (1) 45 feet”

• Subdividing landRegulated (with conditions)

  Subdivisions and land divisions inside Troy town

  • Planned unit developments are subject to the Town of Troy subdivision ordinance (chapter 135).

  “a pud shall be subject to all applicable requirements of the town of troy subdivision ordinance (chapter 135)”

• Permit feesPublished (with conditions)

  Land use and other town permit fees inside Troy town

  • The fee schedule is a linked form that was not opened; amounts are not stated here.

  “please reference the following form for our current fee schedule.”

• Permit processPartial

  Land use and land division applications inside Troy town

  • Application forms and plat checklists are linked; step-by-step review timing is not stated on the page reviewed.

  “land division forms: zoning – town of troy land use applications, plat checklists, etc. are available through the above links.”

Rules another office applies inside Town of Troy

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

• Who permits septicMixed (with conditions)

  Private on-site wastewater systems (septic/POWTS) and non-plumbing sanitation inside Troy town: St. Croix County administers county sanitary permits countywide, which apply inside Troy town; the state sanitary permit is also required for new installations.

  • State sanitary permits govern new POWTS installations; county sanitary permits govern repair, reconnection, rejuvenation and non-plumbing sanitation.
  • The county page describes county-wide administration; it does not name Troy town as a separate septic authority. No Troy town septic rule was located.

  “a state sanitary permit is required for the installation of a private on-site wastewater treatment system (powts). a county sanitary permit is required for the repair, reconnection, or rejuvenation of a powts, or the installation of a non-plumbing sanitation (i.e. privy, composting toilet, etc.)”

• Septic permitRequired

  New private septic installation inside Troy town (state sanitary permit); repair or non-plumbing sanitation (county sanitary permit) inside Troy town, under St. Croix County's countywide program

  • A sanitary permit may only be submitted by a licensed plumber.
  • A sanitary permit is required before obtaining a building permit from your local municipality.

  “a sanitary permit is required before obtaining a building permit from your local municipality. a sanitary permit may only be submitted by a licensed plumber.”

• Septic inspectionRequired

  Private onsite wastewater treatment systems inside Troy town, under the state code as administered by St. Croix County maintenance records

  • Service or inspection at least once every three years unless a management plan says otherwise.
  • Inspections may be conducted by a master plumber, POWTS inspector, septage servicing operator, or POWTS maintainer.

  maintenance interval: <= 3 years (unless otherwise specified in a management plan)

  “this notice complies with wi administrative code sps 383, which mandates that private onsite wastewater treatment systems be serviced or inspected at least once every three years unless otherwise specified in a management plan.”

• Off-grid sanitationLimited

  Privies, composting toilets and other non-plumbing sanitation inside Troy town, administered by St. Croix County countywide

  • A county sanitary permit is required for installation of non-plumbing sanitation.

  “a county sanitary permit is required for the repair, reconnection, or rejuvenation of a powts, or the installation of a non-plumbing sanitation (i.e. privy, composting toilet, etc.)”

Still unanswered

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

• Owner-builder exemption — Owner-builder permit exemption inside Troy town
• Building code adopted — Building code adoption inside Troy town
• Inspections — Building inspection inside Troy town
• Certificate of occupancy — Certificate of occupancy inside Troy town
• Minimum dwelling size — Minimum dwelling size inside Troy 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.