Calaveras County, CA Environmental Rules: Flood Elevation Requirements (2026)
Key Facts
- Freeboard required
- 2 feet above base flood elevation, AE/AH/A1-30 zones
- AO zone standard
- 2 ft above FIRM depth number, or 4 ft if none listed
- Unnumbered A zone
- Administrator sets BFE using best available data
- Certification required
- Registered engineer or surveyor, verified by inspector
- Nonresidential alternative
- Watertight floodproofing in place of elevation
Summary
New residential construction and substantial improvements in Calaveras County's mapped AE, AH and A1-30 flood zones must have the lowest floor, including any basement, elevated at least two feet above the base flood elevation under County Code § 15.06.051.C.1, two feet of freeboard above FEMA's baseline.
C.Elevation and Floodproofing. (See Section 15.06.020 definitions for "new construction," "substantial damage" and "substantial improvement.")1.Residential construction. All new construction or substantial improvements of residential structures shall have the lowest floor, including basement:a.In AE, AH, A1-30 zones, elevated two feet above the base flood elevation.b.In an AO zone, elevated above the highest adjacent grade to a height two feet above the depth number specified in feet on the FIRM, or elevated at least four feet above the highest adjacent grade if no depth number is specified.c.In an A zone, without BFE's specified on the FIRM [unnumbered A zone], elevated two feet above the base flood elevation; as determined under subsection 15.06.042C..
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 23 Update 2).
Full Breakdown
C sets separate elevation rules by zone. In AO zones, a structure must be elevated above the highest adjacent grade to a height two feet above the depth number shown on the Flood Insurance Rate Map, or at least four feet above the highest adjacent grade if the FIRM lists no depth number. C using the best available federal, state or other data. Once a structure is finished, a registered civil engineer or licensed land surveyor must certify the lowest floor elevation, and the county building inspector must verify it, with that certification filed with the floodplain administrator.
2: instead of elevating, they may be floodproofed watertight with walls substantially impermeable to water and components able to resist hydrostatic and hydrodynamic loads, certified by a registered civil engineer or architect. 055.
Violations & Fines
Building below the required elevation without qualifying floodproofing violates Chapter 15.06 and triggers the same enforcement as any other violation of the chapter: a misdemeanor under § 15.06.033, or, under § 15.06.045's graduated schedule, escalating infraction fines from $100 to $500 for repeat violations within a year, becoming a misdemeanor with up to $500 in fines and up to six months in county jail for a fourth or later violation, with each day counted separately.
Frequently Asked Questions
How much freeboard does Calaveras County require above the base flood elevation?
What if my parcel is in an AO zone with no marked depth number?
Who certifies that a building meets the elevation requirement?
Can a nonresidential building skip elevation entirely?
Sources & Official References
Other rules in Calaveras County
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