Zoning, building permits and septic rules in Washington Township, Indiana

Rules another office applies inside Washington Township

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

• Local zoningPresent (with conditions)

  Land inside Washington township, Tippecanoe County, Indiana, that is unincorporated (outside the Cities of Lafayette and West Lafayette and the Towns of Battle Ground, Clarks Hill and Dayton). County Unified Zoning Ordinance applies because no Washington township zoning ordinance was located.

  • The Unified Zoning Ordinance is administered by the Area Plan Commission of Tippecanoe County; the county is the rule-maker here, not the township.
  • The ordinance text reviewed is the Third Edition (January 2, 1998) copy hosted by Purdue Extension, which lists amendments 1-99. The county site lists a current UZO with amendments up to 124 (May 2026); that PDF is too large for the open-page tool and was not read, so later amendments are not verified.
  • Zoning-only rules (dimensional, occupancy) still need the current text before being relied on.

  “an ordinance providing for continuing comprehensive and unified zoning regulations for the unincorporated areas of tippecanoe county”

• Zoning districtsPublished (with conditions)

  Zoning districts applying to land inside Washington township (unincorporated Tippecanoe County)

  • Districts are in the 1998 Third Edition text (including R1, R1a, R1b, R1u); the current UZO with amendments through 124 (May 2026) is the official text to use.

  “unified zoning ordinance (pdf) (with amendments up to 124, (may 2026) please note that this document is over 400 pages)”

• Minimum lot sizeSpecified

  Single-family lot in the R-1 (single-family residential) zone in unincorporated Tippecanoe County, including Washington township land under the county UZO

  • Applies to the 1998 Third Edition text; amendments through 124 (May 2026) are not verified.
  • If the lot is not served by sanitary sewer, the Tippecanoe County Health Department sets the minimum lot-by-lot, but in no case less than 30,000 sq.ft. (the same ordinance text).
  • Lots not served by sanitary sewer are covered by the health department rule.

  minimum lot area, served by sanitary sewer: >= 10000 sq ft (if not served by sanitary sewer, set by county health department lot-by-lot but no less than 30,000 sq ft)

  “minimum lot area: served by sanitary sewer - 10000 sq.ft. not served by sanitary sewer - as determined by the tippecanoe county health department (and the division of sanitary engineering, indiana state department of health except for singleand two-family residences), on a lot-by-lot basis, but in no case less than 30,000 sq.ft.”

  One more reviewed finding on this topic

  • Specified — Single-family lot in the R-1A (low and medium density single-family residential) zone in unincorporated Tippecanoe County, including Washington township land under the county UZO

    “minimum lot area: served by sanitary sewer - 7500 sq.ft. not served by sanitary sewer - as determined by the tippecanoe county health department (and the division of sanitary engineering, indiana state department of health except for singleand two-family residences), on a lot-by-lot basis, but in no case less than 30,000 sq.ft.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Washington Township or Tippecanoe County directly.

• Building permit — Building permit for new home construction inside Washington township
• Owner-builder exemption — Owner-builder exemption for a homeowner building inside Washington township
• Building code adopted — Building code adopted for new construction inside Washington township
• Inspections — Building inspections for new homes inside Washington township
• Certificate of occupancy — Certificate of occupancy for new homes inside Washington township

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.