Indiana Building Codes, Permits and Contractor Rules
Here’s every rule from our 50-state guides for Indiana on one page: the residential building code, frost depth, retaining wall permits, the 811 dig law, drainage law, contractor licensing, deposit limits, mechanics lien deadlines, workers’ comp, planting zones and frost dates. Each section links the official source and the full 50-state comparison.
Indiana at a glance
- Building code: 2018 IRC (statewide)
- Frost depth: 24, 30, or 36 in. minimum footing depth below finish grade, by county (e.g., 36 in. Lake, Allen, St. Joseph; 30 in. Marion, Hamilton; 24 in. Vanderburgh, Monroe)
- 811 notice: At least 2 full working days but not more than 10 calendar days before work begins (requests after 7 a.m. ET don't count that day)
- Contractors: No statewide requirement (local)
- Deposits: No statewide cap
- Liens: 60 days from last furnishing (residential)
- Workers’ comp: 1+ employees
- Drainage rule: Modified common enemy
- Planting zones: 5b to 7b
| Topic | Indiana | Compare |
|---|---|---|
| Residential building code | 2018 IRC (statewide) | All states |
| Frost line depth | 24, 30, or 36 in. minimum footing depth below finish grade, by county (e.g., 36 in. Lake, Allen, St. Joseph; 30 in. Marion, Hamilton; 24 in. Vanderburgh, Monroe) | All states |
| Retaining wall permit | Set locally. Indiana deletes IRC R105 (incl. the R105.2 exemption list) and replaces it with an additions-and-alterations section. | All states |
| 811 notice before digging | At least 2 full working days but not more than 10 calendar days before work begins (requests after 7 a.m. ET don't count that day) | All states |
| Contractor license | No statewide requirement (local) | All states |
| Deposit limit | No statewide cap | All states |
| Right to cancel | 3 business days, sales made at home | All states |
| Lien filing deadline | 60 days from last furnishing (residential) | All states |
| Workers’ comp required | 1+ employees | All states |
| Drainage between neighbors | Modified common enemy | All states |
| Planting zones (2023 USDA) | 5b to 7b | All states |
| Frost dates (NOAA) | Last frost early Apr (Evansville) to early May (South Bend); first frost mid-Oct (South Bend) to late Oct (Evansville) | All states |
Indiana residential building code
- Code
- 2018 International Residential Code with Indiana amendments (2020 Indiana Residential Code, 675 IAC 14-4.4)
- How it applies
- Statewide, mandatory everywhere
- In effect since
- December 26, 2019
- Code agency
- Indiana Fire Prevention and Building Safety Commission (Indiana Department of Homeland Security)
- Who enforces it
- Enforced by county and city building departments.
- Good to know
- Indiana's residential code is based on the 2018 IRC. Your county or city building department issues permits and inspects.
Compare building codes in all 50 states
Frost line depth in Indiana
- Who sets it
- County table in state code
- Statewide value
- 24, 30, or 36 in. minimum footing depth below finish grade, by county (e.g., 36 in. Lake, Allen, St. Joseph; 30 in. Marion, Hamilton; 24 in. Vanderburgh, Monroe)
- Good to know
- Indiana's code (675 IAC 14-4.4-5) assigns all 92 counties a depth: 27 northern counties at 36 in., 29 central counties at 30 in. and 36 southern counties at 24 in. The depth is measured from finished grade to the bottom of the footing.
Frost line depth in every state
Retaining wall permits in Indiana
- Permit exemption
- Set locally. Indiana deletes IRC R105 (incl. the R105.2 exemption list) and replaces it with an additions-and-alterations section.
- Who decides
- Your city, town or county building department decides whether a wall needs a local permit.
- Good to know
- Indiana's code has no statewide permit exemption list, so your city, town or county decides whether a wall needs a permit.
Retaining wall permit rules in every state
811 dig law in Indiana
- One-call center
- Indiana 811
- Notice before digging
- At least 2 full working days but not more than 10 calendar days before work begins (requests after 7 a.m. ET don't count that day)
- Ticket good for
- Expires 11:59 p.m. (Indianapolis time) 20 days after the notice is submitted; work must start within 10 days
- Hand-dig zone
- Facility width plus 2 ft on either side of the marks
- Homeowners
- Partial exemption: the law does not apply to digging done only with a hand tool, on land the excavator owns or controls, no deeper than 12 in. Agricultural tilling (plowing, planting, combining) is also exempt. Anything deeper or with power equipment requires a call.
- The law
- Ind. Code § 8-1-26 (Damage to Underground Facilities)
- Good to know
- HB 1122 changes took effect Jan 1, 2025: a 10-calendar-day maximum notice, 20-day ticket expiration and the 2-ft zone. A working day runs 7 a.m. to 6 p.m. Indianapolis time.
Drainage law and stormwater permits in Indiana
- Rule
- Modified common enemy
- The rule
- Common enemy with an exception: landowners may block or redirect diffuse surface water as they choose, but may not collect or concentrate it and cast it in a body onto a neighbor.
- Leading case
- Argyelan v. Haviland (reaffirmed in Haddix v. Klink). Argyelan v. Haviland, 435 N.E.2d 973 (Ind. 1982); Haddix v. Klink, Ind. Ct. App. No. 22A-CT-145 (July 29, 2022)
- What it means for your yard
- You can generally regrade or build to keep water off your land even if more ends up next door, but you can't gather water (for example with pipes, ditches or a downspout aimed at the line) and dump it in a concentrated flow onto a neighbor.
- Construction stormwater permit
- Indiana Department of Environmental Management (IDEM): 1 acre or more of land disturbance (or smaller sites that are part of a larger common plan): Construction Stormwater General Permit (CSGP)
- State rules below 1 acre
- No statewide rule below the 1-acre permit found; check your county and town.
- Local rules
- Indiana counties and cities, including county drainage boards, often have their own drainage, grading and stormwater rules.
- Good to know
- Indiana follows the common enemy rule: you can generally keep water off your land, but you can't collect it and dump it onto a neighbor in a concentrated flow. State construction stormwater permits start at 1 acre.
Contractor licensing in Indiana
- Statewide rule
- No statewide requirement (local)
- Who needs it
- No statewide contractor license; licensing requirements vary by community, so check the city or county building department.
Contractor license requirements in every state
Contractor deposits and your right to cancel in Indiana
- Deposit limit
- No statewide cap.
- Right to cancel
- Home solicitation sales (consumer transactions the consumer did not solicit, from direct contact away from the supplier's place of business): may cancel before midnight of the third business day after final agreement (Ind. Code §§ 24-5-10-4, 24-5-10-9).
- Written contract
- Required for home improvement contracts over $150 (Home Improvement Contracts Act, Ind. Code 24-5-11). Must include the consumer's name and property address, the supplier's name, address and email, a reasonably detailed description of the work, approximate start and completion dates, the contract price, whether subcontractors will be used, and signatures (Ind. Code § 24-5-11-10).
- The law
- Ind. Code 24-5-11 (Home Improvement Contracts Act); Ind. Code 24-5-10 (Home Solicitation Sales)
- Good to know
- Indiana has no legal cap, but the Attorney General advises paying no more than one-third down and tying the rest to completed work. Contracts over $150 must be in writing.
Contractor deposit limits in every state
Mechanics lien deadlines in Indiana
- Lien deadline (prime)
- Record the sworn statement and notice of intention to hold a lien within 60 days after performing labor or furnishing materials for a Class 2 (residential) structure, 90 days otherwise; the recorder mails a copy to the owner within 3 business days (IC 32-28-3-3).
- Lien deadline (sub/supplier)
- Same as prime.
- Preliminary notice (sub/supplier)
- Required on residential work. New single- or two-family home for the owner's occupancy: suppliers and others furnishing on credit must give the owner written notice and file a copy with the county recorder within 60 days after first delivery or labor. Alteration or repair of an owner-occupied single- or two-family home for someone other than the owner: written notice to the occupying owner within 30 days after first delivery or labor. Each is a condition precedent to the lien (IC 32-28-3-1(h)-(i)).
- Notice of intent
- Not required as a separate step; the lien is a sworn statement and notice of intention to hold a lien (IC 32-28-3-3).
- Enforce within
- Foreclosure complaint within 1 year after recording (or after a recorded written credit expires), or the lien is void (IC 32-28-3-6).
- Homeowner rules
- Subs and suppliers who miss the 30- or 60-day residential notice have no lien. A buyer for value without notice of a new home for their own occupancy takes free of construction liens not recorded before the deed (IC 32-28-3-1(h)-(j)).
- The law
- Ind. Code 32-28-3 (Mechanic's Liens)
- Good to know
- Indiana gives only 60 days to record a lien on residential work, and subs and suppliers on a homeowner's remodel must notify the owner within 30 days of starting.
Mechanics lien deadlines in every state
Workers' comp requirements in Indiana
- Who must carry it
- Every employer covered by the Act must insure its employees or prove to the Board it can pay directly, except those exempted by Ind. Code § 22-3-2-5 (mainly government employers); there is no minimum number of employees (Ind. Code § 22-3-5-1; Indiana WCB). No separate construction threshold.
- Owners and officers
- Executive officers are employees but may elect not to be by written notice to the insurer and the Board. Sole proprietors, partners, and LLC members or managers are not employees unless they elect coverage by notice to the insurer and the Board (Ind. Code § 22-3-6-1(b), 2025 text via Justia).
- Subcontractors
- A person who contracts for work over $1,000 without getting a certificate of coverage from the contractor, or a contractor who sublets work without one, is liable to the same extent as the contractor for the contractor's or sub's employees (Ind. Code § 22-3-2-14(b)-(c)). An independent contractor who opts out files for a certificate of exemption (Dept. of Revenue clearance, filed with the WCB); a hiring party holding a copy of the stamped certificate is protected from claims (Ind. Code § 22-3-2-14.5).
- Homeowners
- The contractor-liability rule does not apply to an owner who contracts for work on the owner's own owner-occupied residential property (Ind. Code § 22-3-2-14(a)(1)).
- Penalties
- The Board may assess a civil penalty of $100 per day if an employer doesn't provide proof of coverage by the 10th day after the Board's request (waived if proof is provided by day 20) (Ind. Code § 22-3-5-2.5; Indiana WCB).
- The law
- Ind. Code Title 22, Art. 3; §§ 22-3-2-5, 22-3-2-14, 22-3-6-1
- State agency
- Indiana Worker's Compensation Board
- Good to know
- Indiana has no minimum employee count. Homeowners hiring work on their own home aren't liable for an uninsured contractor's crew, but contractors who don't collect a sub's certificate of insurance can be.
Workers' comp requirements in every state
Planting zones in Indiana
- 2023 USDA zones
- 5b to 7b
- Coldest-night range
- −15°F to 10°F
- Example cities
- Indianapolis: 6b, Fort Wayne: 6a, South Bend: 6a, Evansville: 7a
- Good to know
- Most of Indiana is zone 6, and the Evansville area is 7a. The 2023 map shows only a tiny patch of 7b, too small to plan around.
Frost dates in Indiana
| Station | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Indianapolis Central Indiana | April 15 | October 26 | 193 |
| South Bend Northern Indiana | May 1 | October 19 | 170 |
| Fort Wayne Northeast Indiana | April 24 | October 21 | 178 |
| Evansville Southwest Indiana | April 4 | October 29 | 206 |
- Typical range
- Last frost early Apr (Evansville) to early May (South Bend); first frost mid-Oct (South Bend) to late Oct (Evansville)
- Good to know
- These are typical (50%) dates from NOAA's 1991–2020 climate normals, so about half of years still bring a 32°F night after the listed spring date. In Indiana, the last spring frost at the stations listed ranges from early April around Evansville to early May around South Bend.
- Local frost or planting guide
- Purdue Extension
Frequently Asked Questions
What building code does Indiana use?
2018 International Residential Code with Indiana amendments (2020 Indiana Residential Code, 675 IAC 14-4.4). It applies as follows: statewide, mandatory everywhere. Your local building department can confirm the edition and amendments for your address.
How deep is the frost line in Indiana?
The state sets 24, 30, or 36 in. minimum footing depth below finish grade, by county (e.g., 36 in. Lake, Allen, St. Joseph; 30 in. Marion, Hamilton; 24 in. Vanderburgh, Monroe). Footings for houses, additions and attached decks go below it.
How much can a contractor ask for up front in Indiana?
No statewide cap. Cancel rights: Home solicitation sales (consumer transactions the consumer did not solicit, from direct contact away from the supplier’s place of business): may cancel before midnight of the third business day after final agreement (Ind. Code §§ 24-5-10-4, 24-5-10-9).
How long does a contractor have to file a mechanics lien in Indiana?
Record the sworn statement and notice of intention to hold a lien within 60 days after performing labor or furnishing materials for a Class 2 (residential) structure, 90 days otherwise; the recorder mails a copy to the owner within 3 business days (IC 32-28-3-3). Subcontractors and suppliers may have different notice rules; see the section above.
What planting zone is Indiana?
On the 2023 USDA map, Indiana runs from zone 5b to 7b. Examples: Indianapolis 6b, Fort Wayne 6a, South Bend 6a. Enter your ZIP on the USDA map for your exact zone.
Do contractors need workers' comp in Indiana?
Every employer covered by the Act must insure its employees or prove to the Board it can pay directly, except those exempted by Ind. Code § 22-3-2-5 (mainly government employers); there is no minimum number of employees (Ind. Code § 22-3-5-1; Indiana WCB). No separate construction threshold. Owner exemptions and subcontractor rules are in the workers’ comp section above.
When is the last frost in Indiana?
At the NOAA stations we list: Last frost early Apr (Evansville) to early May (South Bend); first frost mid-Oct (South Bend) to late Oct (Evansville). These are typical (50%) dates from the 1991–2020 climate normals, so about half of years still bring a 32°F night after the spring date.
This page is general information, not legal or tax advice. Rules change; the agencies and statutes linked above have the final word.
Indiana in each 50-state guide: Frost line depth · 811 dig laws · Retaining wall permits · Contractor licensing · Contractor deposit limits · Building codes · Planting zones · Mechanics lien deadlines · Workers' comp · Frost dates · Drainage laws · Noxious weed laws · Rainfall and snowfall · Landscaper pay · Pesticide applicator licensing · Landscaping sales tax · All state guides
Soil: Indiana’s most common soils, state soil, and how much ground is wet, clayey or shallow to bedrock by county. Indiana soil types
Last checked October 31 and November 1, 2026 against official state and local sources for this state. Rules change; your state agency or local building department has the final word. Spot something out of date? Email info@muthlerlandscaping.com and we’ll fix it.
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Cite as: Muthler Landscaping & Construction, “Indiana Building Codes, Permits and Contractor Rules,” https://muthlerlandscaping.com/state-guides/indiana/ (last checked November 12, 2026).
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