Moreno Valley, CA Environmental Rules: Flood Elevation Requirements (2026)
Key Facts
- Freeboard, AE/AH/A1-30
- 1 foot above base flood elevation
- AO zone, no depth listed
- 2 feet above highest adjacent grade
- Certification required from
- Registered civil engineer or surveyor
- Flood openings minimum
- 1 sq in per sq ft of enclosed area
- Violation penalty
- Misdemeanor, up to $1,000/6 months
Summary
New homes and substantial improvements in Moreno Valley's mapped flood zones must have their lowest floor built at least one foot above base flood elevation under Municipal Code Section 8.12.170(C)(1). A licensed engineer or surveyor must certify the finished elevation to the city before occupancy.
Residential Construction. All new construction or substantial improvements of residential structures, shall have the lowest floor, including basement, and all non-flood-resistant building material and all of the structure's support equipment such as, but not limited to, electrical, heating, ventilation ductworks, plumbing, and air conditioning equipment and other service facilities that could be damaged if submerged under water: In AE, AH, A1-30 zones, elevated at least one foot above the base flood elevation.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: rev 4887234; v10 updated 2026-04-07).
Full Breakdown
170(C)(1) sets the freeboard standard for residential construction: in AE, AH, and A1-30 zones, the lowest floor, including any basement, plus all non-flood-resistant materials and support equipment such as electrical, HVAC, plumbing, and duct work, must be elevated at least one foot above the base flood elevation shown on the Flood Insurance Rate Map. 140(C) using FEMA guidance, and the one-foot-above-BFE standard still applies. Once built, a registered civil engineer or licensed land surveyor must certify the lowest floor's elevation, and a city official must verify it before that certification goes to the floodplain administrator.
170(C)(2): instead of elevating, they may be floodproofed watertight below the required elevation, with structural components able to resist hydrostatic and hydrodynamic loads, certified by a registered civil engineer or architect. 170(C)(3), which requires at least two openings on different walls totaling one square inch of net area per square foot of enclosed area, with opening bottoms no higher than one foot above grade.
Violations & Fines
Building below the required elevation, or occupying a structure without the required engineer or surveyor elevation certification, is a violation of Chapter 8.12 and constitutes a misdemeanor under Section 8.12.080, punishable by up to a $1,000 fine and six months in county jail under the code's general penalty schedule, Section 1.01.230(A). A structure lacking the certification required by Section 8.12.170(C)(1) is presumed in violation until the documentation is provided to the floodplain administrator.
Frequently Asked Questions
How high above flood level must a new house be built in Moreno Valley?
Who has to certify the finished floor elevation?
Can a nonresidential building be floodproofed instead of elevated?
Sources & Official References
Other rules in Moreno Valley
California rules heatmap·Compare Moreno Valley to another location·View the California environmental rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
Flood Elevation Requirements in Nearby Cities
How other cities in Riverside County handle flood elevation requirements.