Frost Line Depth in South Jordan, Utah
- South Jordan’s adopted code
- Checked Oct 2026
- Sources
Verified
30in
76 cm · 2 ft 6 in
Set in the building code South Jordan has adopted.
Source and how we checked
Document: sjc.utah.gov
Climate: 116 nights a year at or below 32 °F (NOAA 1991–2020, Draper-Point Of Mtn, 6.3 mi).
Checked Oct 2026. Report a correction
How deep is the frost line in South Jordan?
"{confirmed quote}". Footings, piers and other permanent supports must reach at least this depth (IRC R403.1.4.1).
Who sets the frost line depth in South Jordan?
Utah leaves the frost line depth to each city or county, and South Jordan fills it in when it adopts the residential code. The value above comes from South Jordan’s own document on sjc.utah.gov. Salt Lake County uses the same 30 in, so the depth does not change at the city limits. See how Utah sets frost line depth.
How deep do footings, decks and water lines need to be in South Jordan?
House or garage footing in South Jordan: 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 South Jordan?
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Average lows are at or below freezing from Dec to Feb. 116 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 25.3 °F.
NOAA 1991–2020 climate normals, Draper-Point Of Mtn station, 6.3 mi away, elevation 4,506 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 25.3 | 28.5 | 35.5 | 40.4 | 49 | 57.8 | 65.5 | 64.5 | 53.9 | 42.1 | 32.5 | 25.6 |
| High | 40 | 44.9 | 55.5 | 62.1 | 74.1 | 85.1 | 93.5 | 91.5 | 81.4 | 66.5 | 51.2 | 40.5 |
South Jordan has fewer freezing nights than 13 of the 25 other Utah places we track. The Utah median is 118. Coldest: Summit County; mildest: St. George.
What frost line depth do towns near South Jordan use?
4 official codes near South Jordan are verified; each links to its document.
| Place | Verified frost line | Distance |
|---|---|---|
| West Jordan | 30 in | 3 mi away |
| Riverton | 30 in | 3 mi away |
| Herriman | 30 in | 5 mi away |
| Millcreek | 30 in | 12 mi away |
How likely is the soil in South Jordan to heave?
USDA rates the sampled soil around South Jordan as 56% moderate, 44% high for frost action (main soils: Bluffdale, Kidman, Parleys).
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 South Jordan?
South Jordan at a glance
- Frost line depth
- 30 in
- County
- Salt Lake County
- Population (2023 est.)
- 84,528
- Mean annual temperature
- 54.5 °F
- ZIP codes (3)
- 84009 · 84095 · 84096