Frost Line Depth in Lehi, UT: Nearby Codes Require 30 in

No official local value

No official frost line depth is published for Lehi.

Nearby official codes require 30 in (4 verified codes).

Source and how we checked

We searched this place’s own code and website and found no published frost line depth.

Climate: 149 nights a year at or below 32 °F (NOAA 1991–2020, Utah Lake Lehi, 4.2 mi).

Checked Oct 2026. Report a correction

Footings Deck Water line Fence post

30 in4 verified codes within 11 mi
149nights a year at or below 32 °F
66%of nearby soil rated “high” for frost action (USDA)

Does Lehi have an official frost line depth?

No adopted frost line depth found for Lehi in its official documents (checked Oct 2026). The nearest official values, from codes we verified, are 30 in. Use the deepest of them until the building department confirms Lehi’s own number.

What frost line depth does Lehi use for footings under Table R301.2(1)? Is it 30 in, like Riverton?

Call 811 at least a few working days before you dig, so buried lines are marked.
Confirm the frost line depth with the Lehi building department.
Ask whether your project needs a permit (decks, larger sheds and footings usually do).
Dig below 30 in (the deepest nearby value) unless the building department tells you otherwise.
Book the footing inspection before you pour concrete.

How deep do footings, decks and water lines need to be in Lehi?

Drawn with the deepest nearby official value (30 in). Confirm Lehi’s own depth before you dig.

House or garage footing Deck footing Water service line Fence post

House or garage footing in Lehi: dig at least 30 in (76 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).

Using the nearby official value of 30 in until Lehi confirms its own
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 Lehi?

Average lows are at or below freezing from Nov to Mar. 149 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 19 °F.

NOAA 1991–2020 climate normals, Utah Lake Lehi station, 4.2 mi away, elevation 4,505 ft.

Monthly temperatures as a table

°F	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Low	19	24.3	31.7	35.9	44.2	50.9	59	58	46.6	36.2	26.6	20.1
High	38	43.9	52.5	61.8	71	83.4	92.2	89.3	79.4	65.1	49	39.8

Lehi has more freezing nights than 18 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 Lehi use?

4 official codes near Lehi are verified; each links to its document.

Official frost line depths near Lehi
Place	Verified frost line	Distance
Riverton	30 in	8 mi away
Herriman	30 in	9 mi away
Eagle Mountain	30 in	10 mi away
South Jordan	30 in	11 mi away

How likely is the soil in Lehi to heave?

Moderate 34%High 66%

USDA rates the sampled soil around Lehi as 34% moderate, 66% high for frost action (main soils: Bramwell, Dagor, Welby).

USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.

Lehi at a glance

Frost line depth: No official local value
County: Utah County
Population (2023 est.): 90,227
Mean annual temperature: 50.8 °F
ZIP codes (3): 84003 · 84043 · 84045