Sacramento, CA Environmental Rules: Flood Elevation Requirements (2026)
Key Facts
- Zones A, AH, AE freeboard
- 1 foot above base flood elevation
- Magpie Creek standard
- 1 ft above 100-yr HGL + 18 in above release point
- Zone AO
- 1 ft above depth number or 2 ft above grade
- Utilities/mechanical equipment
- Elevated/floodproofed 1 ft above BFE
- Certification
- Licensed civil engineer or land surveyor required
Summary
Sacramento requires new construction and substantial improvements in mapped flood zones to elevate the lowest floor at least one foot above the base flood elevation, with a stricter dual standard near Magpie Creek. Section 15.104.050(A)(3) sets zone-specific elevation rules, and a licensed engineer or surveyor must certify the finished elevation before the project is signed off.
Zone A. New construction and substantial improvement of any structure in zone A must have the lowest floor elevated a minimum of one foot above the base flood elevation. The applicant shall include base flood elevation data prepared and sealed by a California-licensed civil engineer in accordance with currently accepted engineering practices... Zones AH and AE. New construction and substantial improvement of any structure in zones AH and AE must have the lowest floor elevated a minimum of one foot above the base flood elevation specified in feet on the FIRM... Magpie Creek. New construction and substantial improvement of any structure in the Magpie Creek floodplain must have the lowest floor elevated a minimum of— (A) One foot above the highest adjacent 100-year flood HGL; and (B) 18 inches above the controlling overland release point in the public right-of-way.
Full Breakdown
050(A)(3)(a)(i) requires new construction and substantial improvements to have the lowest floor elevated at least one foot above the base flood elevation (BFE), with that BFE data prepared and sealed by a California-licensed civil engineer. In Zones AH and AE, the same one-foot freeboard applies but is measured against the BFE printed on the FIRM. Near Magpie Creek, the standard is doubled up: the lowest floor must sit at least one foot above the highest adjacent 100-year flood hydraulic grade line and at least 18 inches above the controlling overland release point in the public right-of-way.
In Zone AO, the lowest floor must be one foot above the FIRM's depth number at the highest adjacent grade, or two feet above the highest adjacent grade if no depth number is shown. Nonresidential structures may instead be dry-floodproofed to that same elevation with watertight walls and hydrostatic-load-resistant components, certified by a California-licensed civil engineer. 050(A)(3)(j). 050(A)(3)(c) requires the lowest-floor elevation to be certified by a California-licensed land surveyor or civil engineer and submitted to the local administrator. 050(A)(3)(f) so they aren't later finished as living space without full compliance.
Violations & Fines
Chapter 15.104 falls within Title 15, so failing to meet the elevation and certification requirements is enforced under § 15.04.060 as a misdemeanor for each day the violation continues, with civil penalties of $250 to $25,000 per day; unauthorized conversion of below-BFE enclosed space also breaches the recorded non-conversion agreement tied to the permit.
Frequently Asked Questions
How much freeboard does Sacramento require above base flood elevation?
Is the elevation rule different near Magpie Creek?
Do HVAC and electrical equipment need to be elevated too?
Who signs off on the finished elevation of my Sacramento home?
Sources & Official References
Other rules in Sacramento
California rules heatmap·Compare Sacramento to another location·View the California environmental rules overview
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Flood Elevation Requirements in Nearby Cities
How other cities in Sacramento County handle flood elevation requirements.