Frost Line Depth in Kosciusko County, Indiana
- Indiana state rule
- Checked Oct 2026
- Sources
State-set value
36in
91 cm · 3 ft
36 in (Indiana rule)
Set by the state: Indiana Residential Code Table R301.2(1), Kosciusko County (state sets the whole design table).
Source and how we checked
Kosciusko County does not publish its own value; the state rule applies.
Document: codes.iccsafe.org
Climate: 131 nights a year at or below 32 °F (NOAA 1991–2020, Warsaw, 1.4 mi).
Checked Oct 2026. Report a correction
How deep is the frost line in Kosciusko County?
Indiana sets the frost footing depth for Kosciusko County at 36 in (91 cm). Footings, piers and other permanent supports must reach at least this depth (IRC R403.1.4.1).
Who sets the frost line depth in Kosciusko County?
Indiana writes this depth into its statewide residential code, so Kosciusko County’s building department enforces the state’s number rather than setting its own. See how Indiana sets frost line depth.
How deep do footings, decks and water lines need to be in Kosciusko County?
House or garage footing in Kosciusko County: dig at least 36 in (91 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| Project | Depth | Rule |
|---|---|---|
| House or garage footing | 36 in | Below the frost line and at least 12 in deep (IRC R403.1.4) |
| Deck footing (attached) | 36 in | Below the frost line and at least 12 in deep (IRC R507.3) |
| Water service line | 42 in | 6 in below the frost line and at least 12 in deep (IRC P2603.5) |
| Fence post bottom | 36 in | No code rule; common practice is below the frost line |
Work out posts, concrete and footing sizes with the fence post depth calculator or the deck footing calculator.
How cold does it get in Kosciusko County?
- J
- F
- M
- A
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- J
- J
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- S
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- N
- D
Average lows are at or below freezing from Nov to Mar. 131 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 16.6 °F.
NOAA 1991–2020 climate normals, Warsaw station, 1.4 mi away, elevation 815 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 16.6 | 18.9 | 27.5 | 37.9 | 48.7 | 58.2 | 61.7 | 59.8 | 52.4 | 41.6 | 31.4 | 22.3 |
| High | 33 | 36.8 | 47.9 | 60.9 | 71.7 | 80.8 | 83.8 | 81.8 | 76.2 | 63.6 | 49.8 | 37.7 |
Kosciusko County has more freezing nights than 47 of the 55 other Indiana places we track. The Indiana median is 120. Coldest: LaGrange County; mildest: Evansville.
What frost line depth do towns near Kosciusko County use?
One official code near Kosciusko County is verified.
| Place | Verified frost line | Distance |
|---|---|---|
| Porter County | 36 in | 65 mi away |
How likely is the soil in Kosciusko County to heave?
USDA rates the sampled soil around Kosciusko County as 61% moderate, 39% high for frost action (main soils: Kosciusko, Crosier, Miami).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
How do you confirm the frost line before you dig in Kosciusko County?
Kosciusko County at a glance
- Frost line depth
- 36 in (Indiana rule)
- Population (2023 est.)
- 80,364
- Mean annual temperature
- 50.1 °F
- ZIP codes (21)
- 46502 · 46504 · 46506 · 46508 · 46510 · 46524 · 46538 · 46539 · 46542 · 46550 · 46555 · 46562 · 46567 · 46580 · 46582 · 46590 · 46732 · 46787 · 46910 · 46962 · 46982