Indiana classifies the structure before it routes the permit.

Class II residential work is handled by local units of government where an applicable local permit and inspection program exists. The correct office may be a city, town, or county, and zoning can be handled by a different plan commission or department. In places without a local residential enforcement entity, the path needs to be confirmed directly rather than assumed from the mailing address.

A Class II structure contains one or two dwelling units unless a portion is regularly used as a Class I structure. Local units of government inspect Class II work. A mixed-use condition can move part or all of the project into a different review lane.

A building used by the public, three or more tenants, or employees of another is generally Class I. Site improvements affecting accessibility to Class I buildings can also be included. Most Class I projects must be filed with IDHS for a Construction Design Release unless a specific exemption applies.

It is the state release issued after the required Class I plan filing satisfies the applicable filing and review requirements. It does not automatically replace local zoning, local permits, fire-department coordination, utility work, health approval, or environmental permits.

The state currently lists the 2020 Indiana Residential Code, 675 IAC 14-4.4, as in effect. It adopts the 2018 International Residential Code with Indiana amendments. Local government administers permits and inspections but must enforce the state commission's building and fire-safety rules.

Requirements depend on classification and scope. A complete package can include a dimensioned site plan, foundation details, floor plans, elevations, wall and roof sections, structural information, accessibility and life-safety plans, energy documentation, and electrical, plumbing, mechanical, fire-protection, or equipment drawings.

A design release and a local permit are different approvals. Where a local permit is required, the local authority administers issuance, zoning coordination, inspections, and local fees. Indiana rules also prevent issuance when a required state design release has not been obtained.

If a property uses onsite sewage, the local health department may need to approve a new system, repair, replacement area, or project that changes wastewater load or conflicts with system components and setbacks. Commercial and specialized systems can involve additional Indiana Department of Health review.

Certain structures, fill, excavation, deposits, and obstructions in a regulated floodway require prior DNR approval. Floodways can exist even when they are not delineated on a FEMA map, so a waterway near the project can require a DNR inquiry before local permit issuance.

Yes. IDEM notes that many projects needing Section 401 Water Quality Certification also need a DNR Construction in a Floodway permit. Federal wetland jurisdiction, state-regulated wetlands, DNR water authority, and local floodplain zoning are separate questions.

There is no single statewide total. Local permit, plan-review, trade, zoning, health, and inspection fees vary by authority. Required Class I state filings use the IDHS fee schedule, and DNR, IDEM, septic, utility, or other approvals can add separate charges.

Local timing depends on completeness and workload. A required IDHS filing begins with a 10-business-day response period, but selected review, corrections, local zoning, septic, floodway, wetland, utility, and inspection steps have separate clocks. Uploading documents piecemeal can restart the initial state response clock.

Stop before concealing additional work and identify every authority that should have approved the project. Recovery can require local after-the-fact permits, plans of existing conditions, opened assemblies, state design release, professional evaluation, corrections, missed inspections, or separate zoning, septic, floodway, and wetland resolution.