Frost Line Depth in Glenview, Illinois
- Glenview’s adopted code
- Checked Oct 2026
- Sources
Verified
42in
107 cm · 3 ft 6 in
Set in the building code Glenview has adopted.
Source and how we checked
Document: glenview.il.us
Climate: 128 nights a year at or below 32 °F (NOAA 1991–2020, Chicago Botanic Garden, 4.4 mi).
Checked Oct 2026. Report a correction
How deep is the frost line in Glenview?
Glenview's building authority sets the frost line depth at 42 in (107 cm). Footings, piers and other permanent supports must reach at least this depth (IRC R403.1.4.1).
Who sets the frost line depth in Glenview?
Illinois leaves the frost line depth to each city or county, and Glenview fills it in when it adopts the residential code. The value above comes from Glenview’s own document on glenview.il.us. See how Illinois sets frost line depth.
How deep do footings, decks and water lines need to be in Glenview?
House or garage footing in Glenview: dig at least 42 in (107 cm). Below the frost line and at least 12 in deep (IRC R403.1.4).
| Project | Depth | Rule |
|---|---|---|
| House or garage footing | 42 in | Below the frost line and at least 12 in deep (IRC R403.1.4) |
| Deck footing (attached) | 42 in | Below the frost line and at least 12 in deep (IRC R507.3) |
| Water service line | 48 in | 6 in below the frost line and at least 12 in deep (IRC P2603.5) |
| Fence post bottom | 42 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 Glenview?
- J
- F
- M
- A
- M
- J
- J
- A
- S
- O
- N
- D
Average lows are at or below freezing from Dec to Mar. 128 nights a year reach 32 °F or colder; Jan is coldest, with an average low of 16.3 °F.
NOAA 1991–2020 climate normals, Chicago Botanic Garden station, 4.4 mi away, elevation 630 ft.
Monthly temperatures as a table
| °F | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Low | 16.3 | 19.1 | 28.2 | 37.6 | 47.6 | 57.3 | 63.4 | 62.3 | 54.7 | 42.7 | 32.5 | 22.3 |
| High | 32.3 | 36 | 45.8 | 56.8 | 68.2 | 78.4 | 83.5 | 82 | 75.2 | 62.8 | 49 | 37.5 |
Glenview has more freezing nights than 37 of the 71 other Illinois places we track. The Illinois median is 127. Coldest: Hoffman Estates; mildest: Madison County.
What frost line depth do towns near Glenview use?
5 official codes near Glenview are verified; each links to its document.
| Place | Verified frost line | Distance |
|---|---|---|
| Palatine | 42 in | 11 mi away |
| Hoffman Estates | 42 in | 17 mi away |
| Lombard | 42 in | 18 mi away |
| Wheaton | 42 in | 21 mi away |
| Naperville | 42 in | 29 mi away |
How likely is the soil in Glenview to heave?
USDA rates the sampled soil around Glenview as 38% moderate, 62% high for frost action (main soils: Ashkum, Beecher, Swygert).
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 Glenview?
Glenview at a glance
- Frost line depth
- 42 in
- County
- Cook County
- Population (2023 est.)
- 46,904
- Mean annual temperature
- 49.6 °F
- ZIP codes (5)
- 60016 · 60025 · 60026 · 60062 · 60093