San Ramon, CA Fence Regulations: Retaining Walls (2026)
Key Facts
- Bench trigger height
- Over 48 inches, Sec. D3-4.D.3
- Max height per wall face
- 48 inches above finished grade
- Minimum bench depth
- 24 inches
- Setback exemption
- Walls under 48 in, Sec. D3-10.B.2.e
Summary
San Ramon requires any embankment over 48 inches high to be benched so no single retaining wall face exceeds 48 inches under Municipal Code Section D3-4.D.3, and a retaining wall under 48 inches is exempt from the zone's setback requirements under Section D3-10.B.2.e.
3. Retaining walls. An embankment to be retained that is over 48 inches in height shall be benched so that no individual retaining wall exceeds a height of 48 inches above finished grade, and each bench has a minimum depth of 24 inches. See Figure 3-5. ... e. A retaining wall less than 48 inches in height above finished grade. An embankment to be retained that is over 48 inches in height shall be benched in compliance with Section D3-4.D (Specific fence and wall requirements).
Full Breakdown
3 treats retaining walls as part of the City's fence and wall standards: an embankment to be retained that exceeds 48 inches in height must be stepped, or benched, so that no individual retaining wall face is taller than 48 inches above finished grade, and each bench must be at least 24 inches deep. This staged design keeps a single retained slope from reading as one tall wall and limits the visual and structural impact on neighboring lots. D benching requirement rather than being allowed to sit unregulated in a setback.
Because retaining walls interact with grading, drainage, and slope stability, the City's Building Division reviews taller walls for structural adequacy as part of the grading and building permit process referenced elsewhere in the Zoning Ordinance's performance standards for grading activities.
Violations & Fines
Constructing a retaining wall or embankment face taller than 48 inches without the required benching, or without the structural review a taller wall triggers, is treated as unpermitted work and charged as an infraction under Section A1-32, with fines of up to $100 for a first offense, $200 for a second, and $550 for each later violation within a year; the City can also require the wall be modified to meet the bench spacing.
Frequently Asked Questions
How tall can a retaining wall be in San Ramon without benching?
Can a retaining wall sit inside my required setback?
Sources & Official References
Other rules in San Ramon
California rules heatmap·Compare San Ramon to another location·View the California fence regulations overview
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Retaining Walls in Nearby Cities
How other cities in Contra Costa County handle retaining walls.