Fullerton, CA Fence Regulations: Retaining Walls (2026)
Key Facts
- Front yard trigger
- Over 3 feet needs Director approval
- Rear/side yard trigger
- Over 4 feet needs Director approval
- Buildable-area walls
- Require minor site plan, Chapter 15.47
- Landscaping exemption
- Decorative terrace walls are exempt
- Reviewing office
- Director of Development Services
Summary
A Fullerton retaining wall over three feet in a front yard, or over four feet in a rear or side yard, needs Director of Development Services approval before it can go in. Fullerton Municipal Code § 15.17.050(G)(2) sets the review trigger and a minor site plan requirement for walls that enlarge buildable area.
(2) (a) Any retaining wall higher than three feet within a front yard setback and higher than four feet within the rear or side yard setback shall be subject to the approval of the Director of Development Services.
(b) A proposed retaining wall above these heights, which in the opinion of the Director is being constructed to enlarge the buildable area on the lot, shall be subject to the approval of a minor site plan pursuant to Chapter 15.47 of this title.
(c) A retaining wall designed for landscaping purposes, however, is exempt from this requirement.
Full Breakdown
" Below those heights a retaining wall is not subject to this discretionary review. 47, a more involved process than a simple sign-off. Clause (c) carves out a specific exemption: a retaining wall designed for landscaping purposes is exempt from the height-triggered approval requirement altogether, so a low decorative terrace wall built purely to hold planting beds does not need Director review even if it edges past three or four feet, provided it is not functioning as a buildable-area retaining structure. 050(F), but the two are governed differently: ordinary fences get a height table with Director discretion up to six feet for non-view-obscuring designs, while retaining walls get a height trigger tied to whether the wall is landscaping, a simple slope retention, or a buildable-area expansion.
Violations & Fines
Constructing a retaining wall above three feet in a front yard or four feet in a rear or side yard without Director of Development Services approval, or without the required minor site plan when the wall enlarges buildable area, violates § 15.17.050(G)(2). It is enforced under § 1.08.010 as an infraction ($100 first offense, $200 second, $500 thereafter within a year) or as a misdemeanor with fines up to $1,000 and up to six months in County Jail, and the city can require the wall be modified or removed.
Frequently Asked Questions
Do I need approval to build a 4-foot retaining wall in my front yard?
What if my retaining wall is just for a planting bed?
Why would my retaining wall need a minor site plan instead of a simple sign-off?
Sources & Official References
Other rules in Fullerton
California rules heatmap·Compare Fullerton to another location·View the California fence regulations overview
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