Retaining Walls: Midway City vs Santa Ana
How do retaining walls rules compare between Midway City, CA and Santa Ana, CA?
Santa Ana has fewer restrictions than Midway City.
Midway City, CA
Orange County
Retaining walls in unincorporated Orange County require building permits and engineered plans when retaining level earth over 4 feet, retaining any slope, or subject to surcharge loads. The OC Grading Manual and Building Code govern design and construction standards.
View full Midway City rules →Santa Ana, CA
Orange County
Retaining walls in Santa Ana not over four feet in height measured from the bottom of the footing to the top of the wall are exempt from building permits under California Building Code provisions adopted by the city. Taller retaining walls require engineering plans and a building permit.
View full Santa Ana rules →Key Facts Comparison
| Fact | Midway City | Santa Ana |
|---|---|---|
| Permit Threshold | Over 4 feet (level earth) | - |
| Engineering Required | Licensed PE or architect | - |
| Slope Retention | Always requires permit | - |
| Reference | OC Grading Manual (2017) | - |
| Permit Exempt | - | Retaining walls 4 ft or under |
| Over 4 ft | - | Building permit + engineering required |
| Surcharge Exception | - | Always requires permit if supporting loads |
| Combined Height | - | Fence atop wall counts toward total |
| Contact | - | Planning & Building Agency (714) 647-5804 |
Highlighted rows indicate differences between cities.
Midway City FAQ
Do I need a permit for a retaining wall in unincorporated Orange County?
Yes, if the wall retains level earth over 4 feet, retains any slope, or is subject to surcharge loads. Engineering by a licensed professional is required and plans must be signed.
Can I build a short retaining wall without a permit?
Retaining walls under 4 feet retaining level earth without surcharge are generally exempt from permits. However, they must still comply with property setback requirements and proper drainage.
Santa Ana FAQ
Do I need a permit for a retaining wall in Santa Ana?
No permit is needed for retaining walls four feet or under in height (from footing to top). Walls over four feet or those supporting surcharges require a building permit with engineering calculations.
Can I build a fence on top of a retaining wall?
Yes, but the combined height of the retaining wall and fence must comply with the fence height limits for your zoning district under SAMC Section 41-610.
Compare other topics
See how Midway City and Santa Ana compare on other ordinance categories.
Want to add a third city?
Use our full comparison tool to compare up to three cities.
Open Comparison Tool