Frost Line Depth in Benton County, AR: Rogers Requires 18 in

No official local value

No official frost line depth is published for Benton County.

Nearby official codes require 18 in (1 verified code).

Source and how we checked

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

Climate: 101 nights a year at or below 32 °F (NOAA 1991–2020, Bentonville 4 S, 2.5 mi).

Checked Oct 2026. Report a correction

Footings Deck Water line Fence post

18 in1 verified code within 6 mi
101nights a year at or below 32 °F
35%of nearby soil rated “high” for frost action (USDA)

Does Benton County have an official frost line depth?

No adopted frost line depth found for Benton County in its official documents (checked Oct 2026). The nearest official values, from codes we verified, are 18 in. Use the deepest of them until the building department confirms Benton County’s own number.

What frost line depth does Benton County use for footings under Table R301.2(1)? Is it 18 in, like Rogers?

Call 811 at least a few working days before you dig, so buried lines are marked.
Confirm the frost line depth with the Benton County building department.
Ask whether your project needs a permit (decks, larger sheds and footings usually do).
Dig below 18 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 Benton County?

Drawn with the deepest nearby official value (18 in). Confirm Benton County’s own depth before you dig.

House or garage footing Deck footing Water service line Fence post

House or garage footing in Benton County: dig at least 18 in (46 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).

Using the nearby official value of 18 in until Benton County confirms its own
Project	Depth	Rule
House or garage footing	18 in	Below the frost line and at least 12 in deep (IRC R403.1.4)
Deck footing (attached)	18 in	Below the frost line and at least 12 in deep (IRC R507.3)
Water service line	24 in	6 in below the frost line and at least 12 in deep (IRC P2603.5)
Fence post bottom	18 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 Benton County?

Average lows are at or below freezing from Dec to Feb. 101 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 24.2 °F.

NOAA 1991–2020 climate normals, Bentonville 4 S station, 2.5 mi away, elevation 1,220 ft.

Monthly temperatures as a table

°F	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Low	24.2	27.2	35.5	44	53.9	62.9	66.5	65.2	57.2	45.9	35.9	26.9
High	46.2	51.4	60	69.4	76.6	84.8	89.4	89.5	82.2	71.4	59	49.2

Benton County has more freezing nights than 23 of the 25 other Arkansas places we track. The Arkansas median is 66. Coldest: Benton County; mildest: Miller County.

What frost line depth do towns near Benton County use?

One official code near Benton County is verified.

Official frost line depths near Benton County
Place	Verified frost line	Distance
Rogers	18 in	6 mi away

How likely is the soil in Benton County to heave?

None 32%Moderate 33%High 35%

USDA rates the sampled soil around Benton County as 32% none, 33% moderate, 35% high for frost action (main soils: Tonti, Captina, Linker).

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

Benton County at a glance

Frost line depth: No official local value
Population (2023 est.): 311,013
Mean annual temperature: 57.3 °F
ZIP codes (22): 72704 · 72712 · 72713 · 72714 · 72715 · 72718 · 72719 · 72722 · 72732 · 72734 · 72736 · 72738 · 72739 · 72745 · 72747 · 72751 · 72756 · 72758 · 72761 · 72762 · 72764 · 72768