Sullivan County, Indiana
Haddon Township is a township in Sullivan County, Indiana. Septic permits inside Haddon Township come from Sullivan County (Sullivan County Health Department · (812) 268-0224). 4 rules below are quoted from official sources and independently re-checked, most recently on October 30, 2026. Rules for unincorporated land are on the Sullivan County page.
Haddon Township does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Construction of Class 2 structures (one- and two-family dwellings) and their accessory structures inside Haddon township, Sullivan County, Indiana; the state residential code applies there as it does everywhere in Indiana
“there are no jurisdictions or locations in the state in which the code is not in effect.”
Residential onsite sewage (septic) systems on land inside Haddon township, Sullivan County, Indiana, administered by the Sullivan County Health Department
“complete a sullivan county onsite system application and return it to the sullivan county health department.”
Installing, repairing, replacing or altering a residential onsite sewage system on land inside Haddon township, Sullivan County, Indiana
permit fee: 100 USD (county document dated 1/28/2019; confirm current amount)
“when the plans are approved, the septic permit may be issued. a permit fee will be due at this time ($100). the permit must be at the site during all phases of system installation.”
Residential onsite sewage systems installed on land inside Haddon township, Sullivan County, Indiana
inspection scheduling notice: >= 2 days (county document says schedule 2-5 days in advance)
“sullivan county has one inspector, you must schedule your inspection 2-5 days in advance.”
We looked and could not find an official answer yet. Silence is not permission; ask Haddon Township or Sullivan County directly.
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.
Unanswered questions are usually a sign that Haddon Township publishes no rule on the point, not that none exists. Sullivan County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Haddon Township means bringing your own water and power. The kit we’d start with:
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