Environmental Rules in San Clemente, CA (2026)
5 verified environmental rules for San Clemente, California, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
San Clemente bans illicit connections and prohibited discharges into its stormwater drainage system under Chapter 13.40, enacted to meet the City's NPDES permit obligations under the Clean Water Act and Porter-Cologne Act. Violations can be prosecuted as misdemeanors carrying up to $1,000 in fines and six months in jail.
San Clemente Stormwater Runoff Control Ordinance
Heavy RestrictionsSan Clemente Municipal Code § 13.40.040, § 13.40.170
It is unlawful for any person to:1.Construct, maintain, operate, and/or utilize any illicit connection;2.Cause, permit, allow, or facilitate any prohibited discharge; ... 4.Discharge any material into the stormwater drainage system, or any water body within the City's jurisdiction that may cause or threaten to cause a condition of pollution, contamination, or nuisance within the meaning of Cali...
Erosion Control
San Clemente's Grading Ordinance requires erosion and sediment control on every active grading site during the rainy season, October 15 through April 15, under Municipal Code Section 15.36.320. Sites moving more than 200 cubic yards in that window need an approved or waived erosion control system before work continues, and the City Engineer oversees desilting basins, planting and stormwater compliance.
San Clemente Grading Erosion Control Requirements
Some RestrictionsSan Clemente Municipal Code § 15.36.320(B)-(C)
B ... Where necessary, temporary and/or permanent erosion control devices such as desilting basins, check dams, riprap or other devices or methods, as approved by the City Engineer, shall be employed to control erosion and provide safety during the rainy season from October 15th to April 15th.C ... No grading work in excess of two hundred (200) cubic yards will be allowed between October 15th a...
Flood Zones
San Clemente regulates construction in flood hazard areas under Chapter 15.76, Flood Damage Prevention. A development permit is required before any construction begins in a mapped special flood hazard area, and new residential construction must have its lowest floor elevated to or above the base flood elevation.
San Clemente Floodplain Development Rules
Some RestrictionsSan Clemente Municipal Code §§ 15.76.080, 15.76.120, 15.76.160
No structure or land shall hereafter be constructed, located, extended, converted or altered without full compliance with the terms of this chapter and other applicable regulations. Violations of the provisions of this chapter by failure to comply with any of its requirements (including violations of conditions and safeguards established in this chapter in connection with conditions) shall be u...
Defensible Space
San Clemente enforces defensible space and fire-spread rules through its Wildland-Urban Interface Code, adopted from the 2025 California WUI Code (Title 24, Part 7). New construction in wildfire risk areas must have an Orange County Fire Authority-reviewed fuel modification plan meeting OCFA Guideline C-05, and the city deleted two state exceptions to the code's ignition-resistant construction requirements, making San Clemente's standard stricter than the unamended state minimum.
San Clemente Wildland-Urban Interface Defensible Space Code
Some RestrictionsSan Clemente Municipal Code §§ 15.13.010, 15.13.020
The City Council of the City of San Clemente hereby adopts by reference California Code of Regulations Title 24, Part 7, known and designated as the Wildlife-Urban Interface Code, 2025 Edition based on the International Wildlife-Urban Interface Code, 2024 Edition, as published by the International Code Council with the modifications set forth below for the purpose of prescribing regulations for...
Flood Elevation Requirements
San Clemente requires new residential construction in a special flood hazard area to elevate the lowest floor, including any basement, to or above the base flood elevation under Municipal Code Section 15.76.160. In coastal high hazard areas the standard is stricter: structures must sit on anchored pilings or columns above base flood elevation, per Section 15.76.230, on top of the separate FEMA and Coastal Act permitting that also applies near the shore.
San Clemente Base Flood Elevation Standards
Some RestrictionsSan Clemente Municipal Code §§ 15.76.160(C)(1)(c), 15.76.230(A)
1.Residential construction, new construction and substantial improvement shall have the lowest floor, including basement: ... c.In all other areas, elevated to or above the base flood elevations. Upon the completion of the structure the elevation of the lowest floor, including basement, shall be certified by a registered professional engineer or surveyor, and verified by the Community Building ...
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