Bolthole Index

Delaware County, Ohio

Zoning, building permits and septic rules in Thompson Township, Ohio

Thompson Township is a township in Delaware County, Ohio. Septic permits inside Thompson Township come from Thompson Township. 3 rules below are quoted from official sources and independently re-checked, most recently on November 7, 2026. Rules for unincorporated land are on the Delaware County page.

Answers from the rulebook for Thompson Township

Rules another office applies inside Thompson Township

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

  • Building permitRequired

    Construction and other listed regulated building work inside Thompson Township, Delaware County, Ohio, administered by Delaware County Building Safety.

    • The permit rule covers construction, enlargement, alteration, repair, moving, occupancy changes, and listed building-service-system work regulated by the Ohio Building Code or Residential Code of Ohio.
    • At application, the county code requires plans/specifications and requires a certified address certificate, driveway permit, zoning certificate, zoning permit, and, where applicable, drainage/erosion-and-sedimentation-control, Soil and Water Drainage, and septic permits.
    • A permit is invalid if work does not begin within 12 months; one 12-month extension is available if timely requested with required fees. It is also invalid after a work delay or suspension over six months, subject to two six-month extensions if timely requested with required fees.

    initial permit validity if work has not commenced: 12 months (One additional 12-month extension is granted if requested at least 10 days before expiration and required fees are paid.) · work-delay threshold causing invalidity: > 6 months (Two six-month extensions are granted if requested at least 10 days before expiration and required fees are paid.)

    “shall first make application to the building official and obtain the required permit.”
  • Local zoningPresent (with conditions)

    Land inside Thompson Township, Delaware County, Ohio; zoning is administered by Delaware County rather than by a Thompson Township zoning authority.

    • The cited Regional Planning Commission page directs users of incorporated areas to contact those areas directly.
    • The county resolution is applicable to Marlboro, Radnor, and Thompson Townships.
    “Zoning Resolution, applicable to Marlboro, Radnor, and Thompson Townships in Delaware County”
  • Who permits septicLocal (with conditions)

    Household sewage treatment systems on land inside Thompson Township, Delaware County, Ohio, where connection to a sanitary sewer system is not feasible.

    • The Delaware Public Health District serves Delaware County except portions annexed to Westerville, Columbus, and Dublin.
    • Household sewage treatment systems serve one-, two-, or three-family dwellings and are used where sanitary-sewer connection is not feasible.
    • A soil evaluation is required for every lot; the system design must be completed and submitted to the Health District.
    • After site/plan review, a signed installation permit and the appropriate fee are required; the installation permit is valid for one year from issuance.

    installation permit validity: 1 year

    “serving Delaware County (except portions annexed to Westerville, Columbus, and Dublin) [...] granting an operational permit for a household sewage treatment system”

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.

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