Pacifica, CA Fence Regulations: Retaining Walls (2026)
Key Facts
- Height measured from
- Lower ground level
- Terracing allowed
- Yes, no maximum tiers set
- Offset between terraces
- At least 3 feet
- Offset must be
- A planting area
- Governing section
- Same section as fence height limits
Summary
Pacifica measures retaining wall height from the lower ground level where grade differs on either side, under Municipal Code Section 9-4.2503(b). The code does not cap how many terraces a retaining wall system can have, but Section 9-4.2503(c) requires each terraced wall to be offset at least three feet from the next by a planting area.
When there is a difference in the ground level on opposite sides of a retaining wall, height shall be measured from the lower ground level. ... This section shall not be construed to limit terracing of retaining walls. Terraced walls shall be offset at least three feet (3') from each other by a planting area.
Full Breakdown
2503. ' That differs from how the code measures an ordinary fence on sloped ground, where height is generally measured from the higher ground level instead. Subsection (c) addresses hillside lots where a single retaining wall would otherwise have to be very tall: 'This section shall not be construed to limit terracing of retaining walls. ' In practice, a property owner on a sloped Pacifica lot, common given the city's hillside and bluff terrain, can step a tall retaining wall into a series of shorter terraced walls rather than build one wall that would exceed the six-foot residential limit, provided each terrace is set back at least three feet from the one below or above it and that gap is planted rather than left as bare structure. The section does not specify a maximum overall height for a terraced system, only the minimum offset between tiers.
Violations & Fines
A retaining wall built without the required lower-grade height measurement, or a terraced wall system missing the three-foot planted offset between tiers, is a zoning violation of Section 9-4.2503. Under the citywide penalty section, 1-2.01, violating any Municipal Code requirement is a misdemeanor carrying up to a $1,000 fine, up to six months in county jail, or both, with continuing violations charged separately each day.
Frequently Asked Questions
How is retaining wall height measured on a sloped Pacifica lot?
Can I build a tall retaining wall in steps instead of one wall?
What has to go in the gap between terraced retaining walls?
Sources & Official References
Other rules in Pacifica
California rules heatmap·Compare Pacifica to another location·View the California fence regulations overview
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Retaining Walls in Nearby Cities
How other cities in San Mateo County handle retaining walls.