Frost Line Depth in Las Vegas, Nevada
- Las Vegas’s adopted code
- Checked Oct 2026
- Sources
Verified
12in
30 cm · 1 ft
12 in Below 5,000 ft
Set in the building code Las Vegas has adopted.
Source and how we checked
Document: up.codes
Climate: 11 nights a year at or below 32 °F (NOAA 1991–2020, Las Vegas Air Terminal, 4.1 mi).
Checked Oct 2026. Report a correction
How deep is the frost line in Las Vegas?
Las Vegas' building authority sets the frost line depth at 12 in (30 cm) below 5,000 ft elevation (Southern Nevada code; higher ground differs). Footings, piers and other permanent supports must reach at least this depth (IRC R403.1.4.1).
Who sets the frost line depth in Las Vegas?
Nevada leaves the frost line depth to each city or county, and Las Vegas fills it in when it adopts the residential code. The value above comes from Las Vegas’s own document on up.codes. Clark County uses the same 12 in, so the depth does not change at the city limits. See how Nevada sets frost line depth.
How deep do footings, decks and water lines need to be in Las Vegas?
House or garage footing in Las Vegas: dig at least 12 in (30 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| 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 | 18 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 Las Vegas?
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Las Vegas never averages a low below freezing. 11 nights a year reach 32 °F or colder; Dec is coldest, with an average low of 38 °F.
NOAA 1991–2020 climate normals, Las Vegas Air Terminal station, 4.1 mi away, elevation 2,203 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 39.4 | 42.7 | 48.5 | 55 | 64.2 | 73.7 | 79.8 | 77.5 | 70.2 | 57.5 | 45.5 | 38 |
| High | 58 | 62.4 | 70.5 | 77.9 | 87.8 | 98.6 | 103.8 | 102.1 | 94.2 | 80.5 | 66.8 | 56.3 |
Las Vegas has fewer freezing nights than 5 of the 6 other Nevada places we track. The Nevada median is 136. Coldest: Douglas County; mildest: Henderson.
What frost line depth do towns near Las Vegas use?
One official code near Las Vegas is verified.
| Place | Verified frost line | Distance |
|---|---|---|
| Clark County | 12 in | 14 mi away |
How likely is the soil in Las Vegas to heave?
USDA rates the sampled soil around Las Vegas as 97% none, 3% low for frost action (main soils: Dalian, Las Vegas, Canutio).
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 Las Vegas?
Las Vegas at a glance
- Frost line depth
- 12 in Below 5,000 ft
- County
- Clark County
- Population (2023 est.)
- 660,929
- Mean annual temperature
- 68.8 °F
- ZIP codes (24)
- 89030 · 89101 · 89102 · 89104 · 89106 · 89107 · 89108 · 89109 · 89110 · 89117 · 89124 · 89128 · 89129 · 89130 · 89131 · 89134 · 89135 · 89138 · 89143 · 89144 · 89145 · 89146 · 89149 · 89166