Frost Line Depth in Bingham County, Idaho
- Bingham County’s adopted code
- Checked Oct 2026
- Sources
Verified
30in
76 cm · 2 ft 6 in
Set in the building code Bingham County has adopted.
Source and how we checked
Document: binghamid.gov
Climate: 162 nights a year at or below 32 °F (NOAA 1991–2020, Blackfoot Fire Dept, 3.2 mi).
Checked Oct 2026. Report a correction
How deep is the frost line in Bingham County?
Bingham County's building authority sets the frost line depth at 30 in (76 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 Bingham County?
Idaho leaves the frost line depth to each city or county, and Bingham County fills it in when it adopts the residential code. The value above comes from Bingham County’s own document on binghamid.gov. See how Idaho sets frost line depth.
How deep do footings, decks and water lines need to be in Bingham County?
House or garage footing in Bingham County: dig at least 30 in (76 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| Project | Depth | Rule |
|---|---|---|
| House or garage footing | 30 in | Below the frost line and at least 12 in deep (IRC R403.1.4) |
| Deck footing (attached) | 30 in | Below the frost line and at least 12 in deep (IRC R507.3) |
| Water service line | 36 in | 6 in below the frost line and at least 12 in deep (IRC P2603.5) |
| Fence post bottom | 30 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 Bingham County?
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Average lows are at or below freezing from Nov to Mar. 162 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 16.8 °F.
NOAA 1991–2020 climate normals, Blackfoot Fire Dept station, 3.2 mi away, elevation 4,499 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 16.8 | 20.5 | 29.1 | 34.7 | 42.8 | 49.8 | 56 | 54.2 | 46 | 35 | 25.5 | 17.5 |
| High | 31.2 | 37 | 48.8 | 57.4 | 67.6 | 76.7 | 86.9 | 85.9 | 75.1 | 60.5 | 44.8 | 32.1 |
Bingham County has more freezing nights than 10 of the 13 other Idaho places we track. The Idaho median is 132. Coldest: Madison County; mildest: Canyon County.
How likely is the soil in Bingham County to heave?
USDA rates the sampled soil around Bingham County as 100% moderate for frost action (main soils: Packham, Hayeston, Bock).
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 Bingham County?
Bingham County at a glance
- Frost line depth
- 30 in
- Population (2023 est.)
- 50,395
- Mean annual temperature
- 47.2 °F
- ZIP codes (12)
- 83202 · 83203 · 83210 · 83211 · 83215 · 83218 · 83221 · 83236 · 83262 · 83274 · 83277 · 83402