Frost Line Depth in Sacramento, California

Sacramento’s adopted code
Checked Oct 2026
Sources

Verified

0in

No frost depth required

Set in the building code Sacramento has adopted.

Footings still go at least 12 in (30 cm) below undisturbed ground (IRC R403.1.4).

Source and how we checked

Document: cityofsacramento.gov

Climate: 4 nights a year at or below 32 °F (NOAA 1991–2020, Sacramento 5 Ese, 2.9 mi).

Checked Oct 2026. Report a correction

Footings Deck Water line Fence post

0 of 3nearby verified codes use the same depth
4nights a year at or below 32 °F
100%of nearby soil rated “none” for frost action (USDA)

How deep is the frost line in Sacramento?

Sacramento's building authority sets the frost line depth at 0 in (0 cm). Footings, piers and other permanent supports still go at least 12 in below undisturbed ground (IRC R403.1.4).

Who sets the frost line depth in Sacramento?

California leaves the frost line depth to each city or county, and Sacramento fills it in when it adopts the residential code. The value above comes from Sacramento’s own document on cityofsacramento.gov. See how California sets frost line depth.

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

House or garage footing Deck footing Water service line Fence post

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

Minimum depths in Sacramento with a 0 in frost line
Project	Depth	Rule
House or garage footing	12 in	Below the frost line and at least 12 in deep (IRC R403.1.4)
Deck footing (attached)	12 in	Below the frost line and at least 12 in deep (IRC R507.3)
Water service line	12 in	6 in below the frost line and at least 12 in deep (IRC P2603.5)
Fence post bottom	12 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 Sacramento?

Sacramento never averages a low below freezing. 4 nights a year reach 32 °F or colder; Dec is coldest, with an average low of 40.7 °F.

NOAA 1991–2020 climate normals, Sacramento 5 Ese station, 2.9 mi away, elevation 38 ft.

Monthly temperatures as a table

°F	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Low	41.1	43.7	46.7	49.3	54	58.7	61.4	61	58.8	52.9	45.3	40.7
High	56.5	62.2	67.8	73.5	81.3	89	94.4	93.5	89.3	78.9	65.3	56.4

Sacramento has more freezing nights than 110 of the 208 other California places we track. The California median is 3. Coldest: El Dorado County; mildest: San Diego.

What frost line depth do towns near Sacramento use?

3 official codes near Sacramento are verified; each links to its document.

Official frost line depths near Sacramento
Place	Verified frost line	Distance
Brentwood	30 in	46 mi away
Placer County	18 in	53 mi away
Dublin	12 in	63 mi away

How likely is the soil in Sacramento to heave?

None 100%

USDA rates the sampled soil around Sacramento as 100% none for frost action (main soils: Urban land, San Joaquin, Kimball).

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 Sacramento?

Call 811 at least a few working days before you dig, so buried lines are marked.
Confirm the frost line depth with the Sacramento building department.
Ask whether your project needs a permit (decks, larger sheds and footings usually do).
Dig below 0 in unless the building department tells you otherwise.
Book the footing inspection before you pour concrete.

Sacramento at a glance

Frost line depth: 0 in
County: Sacramento County
Population (2023 est.): 526,384
Mean annual temperature: 63.4 °F
ZIP codes (27): 95660 · 95673 · 95758 · 95811 · 95814 · 95815 · 95816 · 95817 · 95818 · 95819 · 95820 · 95821 · 95822 · 95823 · 95824 · 95825 · 95826 · 95828 · 95829 · 95831 · 95832 · 95833 · 95834 · 95835 · 95838 · 95841 · 95864