Environmental Rules in Solano County, CA (2026)

Solano County Code Sec. 31-31 (National Pollution Discharge Elimination System)

All grading plans and permits with land disturbance equal to or greater than 1 acre shall comply with the provisions of this section for NPDES compliance. No grading and drainage permit shall be issued unless the plans for such work include a Storm Water Pollution Prevention Plan with details of best management practices, including desilting basins or other temporary drainage or control measure...

Solano County Code Sec. 31-20(a)

Except as exempted in sections 31-21 and 31-22 of this article, no person shall commence or perform any of the following acts: change the topography of any land in such manner that alters or interferes with existing water drainage; fill, close or divert any storm water drainage channel or water course; grade, fill, excavate, or clear vegetation for any purpose without having first obtained a gr...

Solano County Code §§ 12.2-30, 12.2-32, 12.2-41

This ordinance shall apply to all special flood hazard areas within the jurisdiction of the County of Solano. ... Upon application for a building, zoning, use or grading permit, the Solano County building inspector, Director of Resource Management, or other employee responsible (responsible employee) for review of such applications, shall review the submitted application and plans and determine...

Solano County Code § 28.75.30(A)(7)(b)(4)

b. Except in the ASV-20 zoning district, a dwelling located in an area designated as a High Fire Hazard Severity Zone by the State Fire Marshal may be approved for use as a vacation house rental if the following findings can be made: ... (4) Defensible space around the dwelling is provided and will be maintained at all times in accordance with Section 4291 of the Public Resources Code and...

Solano County Code § 12.2-50(b)(2), (c)(1)

New construction and substantial improvements of any residential structure shall have the lowest floor, including basement, elevated at least one (1') foot above the base flood elevation. Upon the completion of the structure, the elevation of the lowest floor, including basement, shall be certified by a registered professional engineer or surveyor, or verified by the building inspector to be pr...