Indiana
Solar Permit Plans.
NEC 2020. Net Metering Available.
AES Indiana · Duke Energy IN · NIPSCO.
Indiana solar permit plan sets for licensed solar installers, EPCs, and roofing companies statewide. Indiana has three primary investor-owned utilities — AES Indiana (central/Indianapolis), Duke Energy Indiana (south/west), and NIPSCO (north) — each with its own interconnection and net metering program. Cold climate: ASCE 7 snow loads required statewide. Indiana property tax deduction and sales tax exemption on solar. NEC 2020.
Indiana Has Three Investor-Owned Utilities — AES Indiana, Duke Energy Indiana, and NIPSCO. Each Has Its Own Net Metering and Interconnection. Cold Climate: Snow Loads Required.
Indiana ground snow loads of 20 to 25 psf require ASCE 7 cold climate structural calculations in every plan set. Indiana offers a property tax deduction for solar (IC § 6-1.1-12-26.1) and a sales tax exemption on solar equipment. NEC 2020 applies statewide under the Indiana Fire Prevention and Building Safety Commission.
Permit Design also provides residential solar permit drawings, solar drafting services, pv permit plans, battery permit plans, and ev charger permit packages for Indiana — all formatted for local AHJ and utility submission.
Indiana's permitting landscape is shaped by its three-utility structure. The utility at the address — AES Indiana, Duke Energy Indiana, or NIPSCO — determines which interconnection application is required. Submitting the wrong utility application is the most common Indiana permit delay. AES Indiana territory covers Indianapolis and most of Marion, Hamilton, Hendricks, and Morgan counties. Duke Energy Indiana covers Evansville, Terre Haute, Columbus, and Bloomington. NIPSCO covers northern Indiana from South Bend and Fort Wayne through the Lake Michigan shoreline. Some addresses in suburban Indianapolis fall in Duke Energy Indiana territory despite feeling like "Indianapolis" — Hamilton County (Carmel, Fishers, Noblesville) is Duke Energy Indiana, not AES Indiana.
Indiana building permits are handled at the city and county level with no statewide streamlining. Indianapolis benefits from Unigov — the consolidated city-county government that gives Indianapolis Building and Construction Services jurisdiction over most Marion County addresses. Fort Wayne, South Bend, Evansville, and Carmel each operate separate city building departments. Hamilton County addresses outside incorporated city limits use the Hamilton County Area Plan Commission. Indiana residential solar permits typically take 5 to 15 business days depending on the AHJ. Commercial and ground-mount projects require PE-stamped drawings and may take longer in counties with less frequent solar permit volume.
Three Separate Investor-Owned Utilities Serve Indiana. Each Has Its Own Interconnection Application. Utility Confirmed Per Address Before Building.
Indiana Property Tax Deduction. Sales Tax Exemption on Solar Equipment. Net Metering Under IURC. No State Income Tax Credit.
| Incentive | Status | Details |
|---|---|---|
| Indiana Net Metering | ✅ Available | Available from AES Indiana, Duke Energy Indiana, NIPSCO under IURC — confirm current credit rate per utility |
| Indiana Property Tax Deduction | ✅ Active | IC § 6-1.1-12-26.1 — property tax deduction for solar energy system assessed value |
| Indiana Sales Tax Exemption | ✅ Active | Indiana sales tax exemption on solar energy equipment purchases |
| Indiana State Income Tax Credit | ❌ None | No state solar income tax credit in Indiana in 2026 |
| Federal Residential Tax Credit (25D) | ❌ Expired | Federal 25D residential solar credit expired December 31, 2025 |
NEC 2020. IBC/IRC 2021. Cold Climate: 20–25 psf Snow Loads Statewide.
Also doing commercial rooftop, carport, or ground-mount in Indiana?
Indiana commercial solar permit plan sets reference IBC 2021 with NEC 2020 electrical throughout. Three-utility Indiana commercial landscape — AES Indiana (Indianapolis), Duke Energy Indiana (southern IN), and NIPSCO (northern IN) each have separate commercial interconnection applications under IURC oversight. ASCE 7 cold climate snow load calcs required statewide. Engineering support for commercial rooftop, carport, and ground-mount installations across all three IOU territories.
AES Indiana, Duke Energy Indiana, and NIPSCO Each Serve Different Indiana Cities. The Utility Determines the Interconnection Application. The AHJ Determines the Permit Process.
Typical Indiana Residential Solar Permit: 3 to 6 Weeks From Plan Set to Permission to Operate. Utility Territory Determines Interconnection Application.
Every Indiana Plan Set: 7 Sheets. NEC 2020. Utility-Formatted Per Address. Cold Climate Snow Load Calcs. Property Tax Deduction Note.
The Permit Design Commitment — Every Indiana Project
What every solar installer, EPC, and roofing company can expect on every Indiana plan set we deliver.
Indiana Solar Permit Design — Installer FAQ
Indiana has three main investor-owned electric utilities: AES Indiana (formerly Indianapolis Power & Light) serving Indianapolis and central Indiana; Duke Energy Indiana serving southern and western Indiana; and NIPSCO (Northern Indiana Public Service Company) serving northern Indiana including South Bend, Fort Wayne, Hammond, and Gary. Net metering is available from all three under Indiana Utility Regulatory Commission oversight.
Indiana has net metering available from its three primary investor-owned utilities — AES Indiana, Duke Energy Indiana, and NIPSCO — under Indiana Utility Regulatory Commission (IURC) jurisdiction. Net metering is available for qualifying residential and small commercial solar systems, crediting excess solar exports against the customer's electricity bill. Indiana's net metering program and credit terms have been subject to IURC regulatory proceedings in recent years, with utilities seeking modifications to credit rates. As a result, current net metering credit terms vary by utility and may differ from historical full retail rate programs. Before finalizing system size and financial projections for any Indiana solar project, confirm the current net metering credit terms directly with the applicable utility — AES Indiana, Duke Energy Indiana, or NIPSCO — per address. Battery storage that maximizes self-consumption reduces reliance on export credit rates and improves system economics regardless of the prevailing net metering terms.
Indiana offers two direct state-level financial incentives for solar. First, Indiana Code § 6-1.1-12-26.1 provides a property tax deduction for the assessed value of qualifying solar energy systems — reducing the property tax liability on solar-equipped homes and businesses. At Indiana's effective property tax rate of approximately 0.85%, a solar system adding $20,000 to assessed value saves approximately $170 per year in property taxes, or $4,250 over a 25-year system life. Second, Indiana exempts solar energy equipment from the 7% state sales tax under Indiana Code § 6-2.5-5-5.1 — saving approximately $1,400 on a $20,000 system at purchase. Net metering is available from AES Indiana, Duke Energy Indiana, and NIPSCO under IURC oversight — confirm current credit rate per utility before finalizing projections. No Indiana state solar income tax credit exists in 2026. Federal 25D residential credit expired December 31, 2025. File Form 18865 with the county assessor after installation to claim the property tax deduction.
Indiana Code § 6-1.1-12-26.1 provides a property tax deduction for the assessed value increment that a solar energy system adds to residential or commercial property. This is a deduction — not a full exemption as in Alabama (Act 2013-407) or Arkansas (Ark. Code § 26-26-1104) — but it meaningfully reduces the property tax impact of solar. At Indiana's effective property tax rate of approximately 0.85%, a solar installation adding $20,000 to assessed value saves approximately $170 per year — or $4,250 over a 25-year system life. The deduction is filed on Form 18865 with the applicable Indiana county assessor after installation and must be renewed periodically. Commercial property owners installing solar also qualify under the same statute. Confirm current deduction terms, renewal requirements, and Form 18865 procedures with the specific Indiana county assessor before advising customers — some counties have updated administrative processes.
NEC 2020 under Indiana's State Building Code, adopted by the Indiana Fire Prevention and Building Safety Commission. Indiana adopted NEC 2020 statewide for all electrical installations including solar PV systems. Article 690 governs Indiana solar PV system design — including rapid shutdown (§690.12), wiring methods, string sizing, inverter disconnects, and system labeling. Article 706 governs energy storage systems. Article 625 governs EV charging equipment. Some Indiana municipalities may maintain local amendments — confirm with the specific AHJ before finalizing plan set content. IBC 2021 and IRC 2021 are the current Indiana structural codes. Indiana has not adopted NEC 2023 as of 2026.
Yes — snow loads are required in every Indiana solar plan set structural section. Indiana ground snow loads are generally 20 to 25 psf statewide under ASCE 7 — moderate by Midwest standards (Michigan sees 20 to 40+ psf, Wisconsin 25 to 40+ psf) but significantly higher than Sun Belt markets where snow loading is zero. Lake County, La Porte County, and Porter County in northern Indiana near Lake Michigan can see elevated ground snow loads due to lake-effect snow — confirm ASCE 7 values per address for shoreline-adjacent projects. ASCE 7 combined snow, wind, and structural calculations are required in all Indiana solar plan sets. Indiana AHJs — particularly Indianapolis (IBCS), Fort Wayne, South Bend, and Evansville — actively review the structural section for cold climate compliance. Plan sets submitted to Indiana AHJs without Indiana-specific ASCE 7 snow loading will fail structural plan review and require resubmission. Every Indiana plan set we build includes cold climate structural inputs confirmed per address.
Indiana has no statewide PE stamp requirement for standard residential rooftop solar installations. The major Indiana AHJs — Indianapolis (IBCS), Fort Wayne, South Bend, Evansville, and most county building departments — do not require a PE stamp for standard residential rooftop solar plan sets. Commercial solar installations (typically over 25 kW) require PE-stamped structural drawings. Ground-mount systems of all sizes typically require PE-stamped structural engineering for the foundation and racking design. Some Hamilton County municipalities have requested PE stamps on residential installations — confirm with the specific AHJ before ordering. Permit Design coordinates PE stamp services for Indiana commercial and ground-mount projects upon request.
Most Indiana residential solar permit plan sets are delivered in 24 to 48 hours from project submission. Battery storage plan sets ship same day when ordered with the solar plan set. Commercial solar plan sets: 3 to 5 business days depending on complexity and utility territory. EV charger permit plan sets: 24 to 48 hours. All Indiana residential plan sets include the correct utility interconnection package per address (AES Indiana, Duke Energy Indiana, or NIPSCO), NEC 2020 Article 690 single-line diagram, ASCE 7 cold climate snow load calcs (20–25 psf minimum), structural calculations, and all 7 plan set sheets. Rush delivery available — contact us before ordering to confirm turnaround for your deadline.
Indiana Has Three Major Utilities and a Growing Solar Market. Cold Climate Creates Snow Load Requirements.
New to Permit Design? Your First Indiana Solar Permit Plan Set Is on Us.
Try our Indiana plan sets with zero upfront commitment. Permit Design works exclusively with licensed solar installers, EPC companies, and roofing companies. Here's what you get on your first project:
Mention "free trial" in your order notes. One free residential plan set per new partner account. Available exclusively to licensed solar installers, EPC companies, and roofing companies that perform solar installation.
Residential solar permit drawings, solar drafting services, battery permit plans, ev charger permit packages, and pv permit plans all available for Indiana. Solar drafting services, pv permit plans, battery permit plans, ev charger permit packages, and residential solar permit drawings also available for Indiana from Permit Design. Utility confirmed per address — AES Indiana, Duke Energy Indiana, or NIPSCO — before every plan set build.
Indiana Solar Installers Often Serve Ohio, Illinois, Michigan, and Wisconsin. Permit Design Builds Plan Sets for All Midwest States — With Cold Climate Snow Loads, Each State's Unique Utilities, and NEC 2020.
Top 4 Reasons Indiana Solar Permits Get Rejected. Every One of These Is Avoidable With a Correct Plan Set.
These are the most common reasons Indiana solar permit applications are rejected or delayed at plan review — and the reason Permit Design built Indiana-specific knowledge into every plan set we produce. Every plan set we deliver for Indiana addresses all four of these issues before submission.
Indiana Plan Set Guarantee
Every Indiana plan set is NEC 2020 formatted — correct utility interconnection per address, ASCE 7 cold climate snow load calcs, property tax deduction and sales tax exemption notes. Free revisions for any AHJ correction. 24–48 hr turnaround.
Order Now →Last updated: July 2026. Plan sets reviewed by licensed professional engineer for Indiana structural and electrical compliance.
AES Indiana, Duke Energy Indiana, NIPSCO as three Indiana IOUs confirmed under IURC. Indiana net metering under IURC confirmed. Property tax deduction (IC § 6-1.1-12-26.1) confirmed. Sales tax exemption on solar equipment confirmed. NEC 2020 Indiana adoption confirmed. IBC/IRC 2021 confirmed. ASCE 7 Indiana snow loads (20–25 psf) confirmed. Federal 25D expiration confirmed. Last reviewed July 2026.