Montgomery County, OH Frost Depth & Snow Load: Frost Line Depth (2026)
Key Facts
- Frost depth
- 32 inches, residential and commercial alike
- Ground snow load
- 20 psf
- Who it governs
- All townships in the county, plus villages and cities that contract with the division
- Corroborated by
- City of Dayton, which publishes the same 32 inches
- Currency
- Wind stated as 90 MPH, no code edition named: predates the 2019 RCO
Summary
Montgomery County Building Regulations sets a frost depth of 32 inches, and its jurisdiction reaches every township in the county plus the villages and cities that contract with it.
What are your local climatic design criteria for structural design? Commercial Criteria: Frost Depth = 32"; Ground Snow Load = 20 PSF; Wind Speed = 90 MPH; Seismic Zone = 1. Residential Criteria: Frost Depth = 32"; Ground Snow Load = 20 PSF; Wind Speed = 90 MPH. What areas of Montgomery County are under your jurisdiction? All townships in the county are under the jurisdiction of Montgomery County Building Regulations Division. Also, some villages and cities contract with Montgomery County to do all or some building code enforcement for them.
Full Breakdown
Montgomery County publishes its design criteria in an FAQ rather than on a criteria sheet, and gives the same frost depth for residential and commercial work: 32 inches. What makes this document unusually useful is that it also says who it governs. Every township in the county falls under the Building Regulations Division, and some villages and cities contract with the county for all or part of their building code enforcement, with a jurisdictional chart naming them. So for a large part of Montgomery County this is the operative frost depth even where the address is a municipality rather than a township. The 32-inch figure matches the City of Dayton, the county seat, which publishes the same depth in its own building guidance, useful corroboration across two independent documents. Currency caveat: the wind speed is given as 90 MPH and no code edition is named, both signs the document predates the 2019 Residential Code of Ohio.
Violations & Fines
Footing depth is checked at inspection before concrete is placed. The first question on any Montgomery County project is which department inspects it: the county covers all townships and the jurisdictions that contract with it, while other municipalities run their own departments. Getting that wrong means submitting to the wrong reviewer rather than merely citing the wrong number.
Frequently Asked Questions
How deep do footings have to be in Montgomery County, Ohio?
Does the county rule apply to my address?
Is the snow load different from the frost depth rule?
Sources & Official References
Other rules in Montgomery County
Compare Montgomery County to another location·View the Ohio frost depth & snow load overview
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