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

Rules another office applies inside Hamilton Township

Hamilton 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

  New 1-, 2-, and 3-family residential structures and associated development inside Hamilton Township, Franklin County, Ohio.

  • Hamilton Township states that all its building permits are processed through Franklin County Economic and Planning.
  • The cited county requirement includes building a new house; the county FAQ also lists interior residential alterations, modular houses, detached garages or pole barns, decks, pools, sun rooms or porches, accessory structures greater than 200 square feet, moving structures, and demolition.
  • For property with a private well or cistern, plans must first be examined and approved by Franklin County Public Health before the building permit is issued.
  • Commercial building permits are issued by the State of Ohio, not the Franklin County Building Department.

  “You must obtain a building permit for any of the following activities: [...] Building New House”

• Local zoningPresent (with conditions)

  Unincorporated land inside Hamilton Township, Franklin County, Ohio, where Franklin County administers the applicable county zoning resolution.

  • Hamilton Township states that its planning, zoning, and building permits are processed through Franklin County Economic and Planning.
  • A Certificate of Zoning Compliance is required before changing the use of buildings or land; extending, erecting, or altering an existing or new structure; or disturbing 1 or more acres of land.
  • The Franklin County Zoning Resolution linked by the county zoning page is effective February 20, 2026.

  zoning-resolution-effective-date: 2026-02-20 · land-disturbance threshold: >= 1 acre (A Certificate of Zoning Compliance is required before the disturbance.)

  “All Hamilton Township planning, zoning and building permits are processed through the Franklin County Economic and Planning Department. For more information, visit the appropriate link listed below:”

• Who permits septicLocal (with conditions)

  Household sewage treatment systems and septic approvals for land inside Hamilton Township, Franklin County, Ohio.

  • Franklin County's Economic Development and Planning Department states that septic approvals must be submitted to and approved through Franklin County Public Health.
  • Franklin County Public Health states that it reviews, inspects, and regulates sewage systems.
  • If a septic system discharges to the County’s municipal separate storm sewer system, Franklin County Public Health will work with the owner to connect to an available and accessible sanitary sewer or install an approved septic system.

  “We also review, inspect and regulate sewage systems.”

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.