Dublin, CA Fence Regulations: Retaining Walls (2026)
Key Facts
- Permit-exempt retaining wall height
- 3 feet from footing to top
- Exemption void if
- Wall supports surcharge, steep slope, or liquid
- Fence-on-wall height measured from
- Highest adjacent finished ground level
- Governing sections
- Municipal Code 7.28.310(A)(2) and 8.72.080(C)
- Construction standard
- CBC Section 2304.12.2.8 for treated wood
Summary
In Dublin, California, a retaining wall taller than 3 feet, measured from the footing to the top, needs a building permit under Municipal Code Section 7.28.310(A)(2); shorter walls are exempt unless they hold back a steep slope or impound liquid. Where a fence sits atop a retaining wall, Section 8.72.080(C) measures height from the higher adjacent grade.
2. Retaining walls that are not more than three (3) feet in height, measured from the top of the footing to the top of the wall, unless supporting a surcharge or ground slope exceeding one to twenty (1 (vertical):20 (horizontal)) (five percent (5%)) or impounding Class I, II or IIIA liquids. Note: Among other items, the presence of a geogrid is a surcharge. ... C. Measurement of height. ... Where a fence is being built upon a retaining wall, the height shall be measured from the highest adjacent finished ground level.
Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 2-26, passed March 3, 2026).
Full Breakdown
Retaining walls in Dublin are regulated in two places. 310(A)(2), exempt a retaining wall from needing a building permit only if it is 'not more than three (3) feet in height, measured from the top of the footing to the top of the wall,' and only if the wall does not support a surcharge or a ground slope steeper than one vertical to twenty horizontal (5 percent), and does not impound Class I, II, or IIIA liquids; the code specifically notes that the presence of a geogrid counts as a surcharge, which removes the exemption.
8 of the California Building Code for treated wood used in retaining walls. 300(B) allows the city to bundle a retaining wall permit with the permit for an associated building or fence, provided the work appears on the approved plans. 080(C) states that where 'a fence is being built upon a retaining wall, the height shall be measured from the highest adjacent finished ground level,' meaning the retaining wall's height counts toward the combined fence-and-wall height for zoning purposes rather than resetting the measurement to zero at the wall's own top. 080(A), or the property needs the Site Development Review approval required for a fence or wall up to 12 feet.
Violations & Fines
Building a retaining wall over 3 feet, or one supporting a surcharge or slope, without a permit violates Section 7.28.270 and is prosecuted under Section 1.04.030; the unpermitted wall is also a public nuisance subject to abatement under Chapter 7.52, with removal or correction costs charged to the owner. A fence-on-wall combination that exceeds the Chapter 8.72 height limit once measured from the base grade is a separate zoning violation enforceable under Chapter 8.144.
Frequently Asked Questions
Do I need a permit for a retaining wall in my Dublin backyard?
If I build a fence on top of a retaining wall, how is the height measured?
Does a geogrid behind my retaining wall affect the permit exemption?
Sources & Official References
Other rules in Dublin
California rules heatmap·Compare Dublin to another location·View the California fence regulations overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
Retaining Walls in Nearby Cities
How other cities in Alameda County handle retaining walls.