Building permits, zoning and land rules in Marion County, Indiana

A new structure on unincorporated Marion County land requires improvement-location, drainage and structural permits through the city-county residential development process¹. The improvement-location permit covers a proposed new structure, added square footage or height, and other site improvements unless Indy Rezone provides an exemption¹. The 2020 Indiana Residential Code applies statewide to Class 2 structures and their accessory structures, using the 2018 International Residential Code as modified by Indiana⁸. After permits are issued, inspections are required throughout construction; the site must remain open and accessible¹. Business and Neighborhood Services should confirm the exact permit set before final plans because requirements depend on the structure and site¹.

For unincorporated Marion County, the Department of Business and Neighborhood Services handles residential building and zoning review at 1200 S Madison Ave, Indianapolis, Suite 100; call (317) 327-8700 or email permitquestions@indy.gov¹. Inside Beech Grove, Speedway and Southport, the municipality issues its own building permits^2,3,4. Septic permits remain with the Marion County Public Health Department throughout the county⁵. BNS residential development permits each carry a $32 application fee in addition to the permit fee; structural permits other than structural renovation permits also carry a plan-review fee¹. An owner applying for a structural permit must sign a Statement of Intent and Understanding, while trade permits have added restrictions¹.

Unincorporated Marion County uses the consolidated Indy Rezone ordinance, and applicants must identify the parcel’s zoning district before applying¹. Speedway and Southport have their own zoning; septic systems in those municipalities remain under the Marion County Public Health Department^5,9,10. Minimum setbacks and maximum lot coverage apply by zoning district, and site plans must show distances from the front, rear and side property lines¹. The official GIS service publishes zoning and related layers, but its map is informational rather than the legal ordinance; confirm the district and standards against the current official map and ordinance¹¹. We could not confirm current numeric minimum-home-size, minimum-lot-size or building-height rules, so ask Business and Neighborhood Services about the parcel and proposed house, accessory building, RV or manufactured dwelling¹. Indiana’s agricultural design-release classification does not remove local zoning, permit or inspection requirements¹².

The Marion County Public Health Department administers onsite wastewater systems in Marion County under state standards and the county health code⁵. The department requires a permit for new septic construction and repair of an existing system; the work must meet 410 IAC and Chapter 14 standards, and installers must hold IOWPA certification⁵. Call the onsite-sewage program at 317.221.2266 before fixing a house location or closing on an unsewered lot⁵. Countywide soil data rates 0% of mapped soils as free of severe limitations for a conventional drain field, but that screening statistic does not replace a parcel evaluation⁷. Where new construction will connect to sewer, a Citizens Energy Group sewer-connection permit is required before the structural permit can issue¹. Indiana requires a compliant septic tank and soil-absorption system where a dwelling cannot connect to sanitary sewer and does not allow drywells or cesspools for onsite treatment¹³.

We could not confirm a Marion County rule that gives a general right to live long-term in an RV on a private lot, so ask Business and Neighborhood Services about the parcel’s zoning and the exact proposed use before buying¹. Indiana’s campground rule does not answer the private-lot question because it governs regulated campgrounds and excludes tracts divided into individually deeded lots¹⁴. We could not confirm a separate countywide tiny-home category or minimum home size, so ask Business and Neighborhood Services how a proposed site-built tiny home fits the zoning and residential building-permit requirements¹. Any occupied dwelling without sewer service still needs a compliant sanitation solution; Indiana’s residential rule does not permit a drywell or cesspool as a substitute¹³.

1. For unincorporated Marion County, identify the parcel’s zoning district, setbacks and lot-coverage limit before fixing the site plan¹.
2. Choose sewer or onsite sewage; a planned sewer connection needs a Citizens Energy Group permit before the structural permit, while new septic construction needs a county health permit and an IOWPA-certified installer^1,5.
3. If the property will use a private well not serving a municipality or public utility, have a licensed driller obtain the health permit before construction and budget the $50 fee⁶.
4. Confirm improvement-location, structural, drainage, driveway and any flood permits with Business and Neighborhood Services¹.
5. Submit plans and budget for published permit, application and plan-review fees¹.
6. Use a licensed contractor or meet the added owner-builder conditions for each permit type¹.
7. Keep the site accessible for required inspections throughout construction¹.

Check zoning, wastewater, water, flood exposure and legal road access before treating a parcel as buildable^1,5,6,15. Marion County requires a flood permit for structural work or land alteration in a flood zone, and a floodway or floodplain site plan must be certified by a professional engineer, land surveyor or architect¹. Indiana DNR also regulates most floodway development, while flood-fringe work may avoid state review but still requires the local review^1,16. A state-highway driveway requires permission through INDOT’s electronic permit system¹⁵. For an unsewered parcel, discuss suitability with the county health department because countywide soil data rates 0% as free of severe conventional drain-field limitations^5,7. A private well not serving a municipality or public utility needs a $50 permit obtained by a licensed driller before construction; emergency drilling may begin before the permit only if the driller first notifies the Health Officer by telephone⁶. Within 30 days after drilling, the driller must give the Health Officer and owner a copy of the well record submitted to Indiana DNR⁶. The effective property-tax rate is about 0.9%, with a median annual bill near $1,923⁷.