Frost Line Depth in South Fulton, Georgia
- 4 verified codes nearby
- Checked Oct 2026
No official local value
No official frost line depth is published for South Fulton.
Nearby official codes require 5–12 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: 36 nights a year at or below 32 °F (NOAA 1991–2020, Atlanta Hartsfield International Airport, 8.2 mi).
Checked Oct 2026. Report a correction
Does South Fulton have an official frost line depth?
No adopted frost line depth found for South Fulton in its official documents (checked Oct 2026). The nearest official values, from codes we verified, are 5 to 12 in. Use the deepest of them until the building department confirms South Fulton’s own number.
What frost line depth does South Fulton use for footings under Table R301.2(1)? Is it 5 in, like Fayette County?
How deep do footings, decks and water lines need to be in South Fulton?
Drawn with the deepest nearby official value (12 in). Confirm South Fulton’s own depth before you dig.
House or garage footing in South Fulton: 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 South Fulton?
- J
- F
- M
- A
- M
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- J
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- D
South Fulton never averages a low below freezing. 36 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 35.6 °F.
NOAA 1991–2020 climate normals, Atlanta Hartsfield International Airport station, 8.2 mi away, elevation 1,010 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 35.6 | 38.9 | 45.3 | 52.5 | 61.3 | 68.6 | 71.8 | 71.3 | 65.9 | 54.9 | 44.2 | 38.4 |
| High | 54 | 58.2 | 65.9 | 73.8 | 81.1 | 87.1 | 90.1 | 89 | 83.9 | 74.4 | 64.1 | 56.2 |
South Fulton has fewer 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 South Fulton use?
4 official codes near South Fulton are verified; each links to its document.
| Place | Verified frost line | Distance |
|---|---|---|
| Fayette County | 5 in | 16 mi away |
| Brookhaven | 12 in | 21 mi away |
| Stonecrest | 12 in | 25 mi away |
| Dunwoody | 12 in | 26 mi away |
How likely is the soil in South Fulton to heave?
USDA rates the sampled soil around South Fulton as 100% none for frost action (main soils: Rion, Cecil, Cartecay).
USDA NRCS soil survey, 9 sample points within 2 mi. Higher frost action means more risk of heave; see frost heave.
South Fulton at a glance
- Frost line depth
- No official local value
- County
- Fulton County
- Population (2023 est.)
- 110,920
- Mean annual temperature
- 63.6 °F
- ZIP codes (12)
- 30213 · 30214 · 30268 · 30272 · 30291 · 30296 · 30311 · 30331 · 30336 · 30337 · 30344 · 30349