Bolthole Index

Ozaukee County, Wisconsin

Zoning, building permits and septic rules in Town of Port Washington, Wisconsin

Town of Port Washington is a town in Ozaukee County, Wisconsin. Town of Port Washington adopts its own zoning, so inside its limits Town of Port Washington’s rules apply, not the county’s. Septic permits inside Town of Port Washington come from Ozaukee County (Ozaukee County Land & Water Management Department · 262-284-8313). 3 rules below are quoted from official sources and independently re-checked, most recently on November 9, 2026. Rules for unincorporated land are on the Ozaukee County page.

Answers from the rulebook for Town of Port Washington

Town of Port Washington’s own rules

  • Building permitRequired

    Buildings inside Port Washington town in all zoning districts.

    • The requirement excludes work excepted by § 340-10.
    • Before a Town building permit is issued, a county shoreland/floodplain zoning permit is required where applicable.
    • Before issuance, a county permit is required for installation of an on-site soil absorption sanitary sewage disposal system or other appropriate waste disposal.
    • Before issuance, a Town conditional-use permit is required where applicable.
    • Before issuance, a Town site plan must be approved for any nonresidential use.
    • The Building Inspector grants or denies the permit in writing within 60 days; the permit is good for one year and may be extended upon application and personal appearance before the Town Plan Commission.

    decision timeframe: <= 60 days (Building Inspector grants or denies the building permit in writing.) · permit validity: 1 year (May be extended upon application and personal appearance before the Town Plan Commission.)

    “In all zoning districts no building shall be erected or structurally altered, relocated, or used [...] until a building permit has been issued”
  • Local zoningPresent (with conditions)

    Land inside the Town of Port Washington, Ozaukee County, Wisconsin, governed by the Town's Chapter 340 Zoning and Subdivision Code.

    • The cited Town ordinance amends Chapter 340 regulations for signs and street-yard setbacks.
    “An Ordinance Amending Chapter 340 of the Municipal Code, Known as the Zoning and Subdivision Code, to Modify Regulations for Signs and Street Yard Setbacks”
  • Who permits septicCounty (with conditions)

    Private onsite wastewater treatment systems and unsewered development inside Port Washington town, Ozaukee County, Wisconsin.

    • County sanitary regulations apply to all unsewered development within Ozaukee County.
    • The Town code requires a county permit for installation of an on-site soil absorption sanitary sewage disposal system, or other appropriate waste disposal, before a Town building permit is issued.
    • A sanitary permit application must be submitted to the County for every new POWTS.
    “The Land & Water Management Department administers the Sanitation and Health Ordinance (Chapter 9) [...] Sanitary regulations apply to all unsewered development within the county.”

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.

Off-grid gear

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

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