Apex, NC Fence Regulations: Retaining Walls (2026)
Key Facts
- Engineering trigger
- >5 ft cumulative relief in 50 ft
- Single-family height cap
- 6 ft, max two terraced sections
- Permit issuer
- Building Inspections and Permitting Dept.
- Prohibited material
- Wood lag construction banned
Summary
Apex requires a building permit and a licensed engineer's certification for retaining walls with more than 5 feet of cumulative vertical relief within 50 feet, and caps single-family walls at 6 feet in two terraced sections.
Retaining structures providing a cumulative vertical relief greater than five (5) feet in height within a horizontal distance of 50 feet or less must be designed, inspected, and certified by a licensed professional engineer. Additionally, retaining structures meeting this provision must be constructed under a building permit from the Building Inspections and Permitting Department.
July 1, 2026 Article 8 - Page 15
Official source re-checked September 7, 2026: the cited page had not changed since it was quoted.
Full Breakdown
Apex's Unified Development Ordinance requires any retaining structure with more than 5 feet of cumulative vertical relief within a 50-foot horizontal run to be engineered, inspected, and certified by a licensed professional engineer, and built under a permit from the Town's Building Inspections and Permitting Department. For single-family and duplex lots without a walkout basement, retaining walls cap at 6 feet, in no more than two 6-foot terraced sections spaced at least 3 feet apart. Walkout-basement walls top out at the first-floor elevation and can't encroach into a required setback. Wood lag construction is banned outright, and non-single-family walls must use masonry.
Violations & Fines
Building without the required engineering or a permit is enforced under the UDO's building-permit and site-development standards, with plan review denial or a stop-work order from Building Inspections and Permitting.
Frequently Asked Questions
Does my Apex retaining wall need an engineer?
How tall can a retaining wall be on an Apex single-family lot?
Sources & Official References
Other rules in Apex
Compare Apex to another location·View the North Carolina fence regulations overview
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Retaining Walls in Nearby Cities
How other cities in Wake County handle retaining walls.