Frost Line Depth in Fayette County, Georgia
- Fayette County’s adopted code
- Checked Oct 2026
- Sources
Verified
5in
13 cm · 5 in
Set in the building code Fayette County has adopted.
Footings still go at least 12 in (30 cm) below undisturbed ground (IRC R403.1.4).
Source and how we checked
Document: fayettecountyga.gov
Climate: 65 nights a year at or below 32 °F (NOAA 1991–2020, Atlanta, 5.4 mi).
Checked Oct 2026. Report a correction
How deep is the frost line in Fayette County?
Fayette County's building authority sets the frost line depth at 5 in (13 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 Fayette County?
Georgia leaves the frost line depth to each city or county, and Fayette County fills it in when it adopts the residential code. The value above comes from Fayette County’s own document on fayettecountyga.gov. See how Georgia sets frost line depth.
How deep do footings, decks and water lines need to be in Fayette County?
House or garage footing in Fayette County: 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 | 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 Fayette County?
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Fayette County never averages a low below freezing. 65 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 34.1 °F.
NOAA 1991–2020 climate normals, Atlanta station, 5.4 mi away, elevation 858 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 34.1 | 37.1 | 42.8 | 49.4 | 58.2 | 66.9 | 70.5 | 69.7 | 63.1 | 51.3 | 40.6 | 36.3 |
| High | 55.7 | 60.3 | 67.9 | 75.4 | 82.6 | 88.2 | 91 | 89.9 | 85.1 | 75.9 | 65.8 | 58.1 |
Fayette County has more freezing nights than 58 of the 74 other Georgia places we track. The Georgia median is 51. Coldest: Habersham County; mildest: Glynn County.
What frost line depth do towns near Fayette County use?
3 official codes near Fayette County are verified; each links to its document.
| Place | Verified frost line | Distance |
|---|---|---|
| Stonecrest | 12 in | 27 mi away |
| Brookhaven | 12 in | 32 mi away |
| Dunwoody | 12 in | 38 mi away |
How likely is the soil in Fayette County to heave?
USDA rates the sampled soil around Fayette County as 100% none for frost action (main soils: Cecil, Cartecay, Wehadkee).
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 Fayette County?
Fayette County at a glance
- Frost line depth
- 5 in
- Population (2023 est.)
- 123,351
- Mean annual temperature
- 63.2 °F
- ZIP codes (8)
- 30205 · 30213 · 30214 · 30215 · 30238 · 30269 · 30276 · 30290