Arkansas Retaining Wall Permit Requirements

Statewide Building Code

Arkansas enforces a statewide building and residential code through the Arkansas Fire Prevention Code, which incorporates the International Building Code (IBC) and the International Residential Code (IRC) with Arkansas amendments. These codes are adopted by the Arkansas State Fire Marshal’s office and apply statewide, but building permits and enforcement are issued locally by cities and counties.

Local building departments (e.g., in Little Rock, Fayetteville, Bentonville) are responsible for issuing permits and interpreting these codes in practice.

R404.4 Retaining Walls

In jurisdictions that adopt the IRC framework, the relevant retaining wall provision is:

IRC Section R404.4 – Retaining Walls

This section (from the IRC adopted via the Arkansas Residential Code) states:

  • Retaining walls not laterally supported at the top and retaining more than 48 inches (1219 mm) of unbalanced fill must be designed according to accepted engineering practices to ensure stability against overturning, sliding, and water uplift.
  • Walls over 24 inches (610 mm) that resist lateral loads from structures or slopes also generally require engineered design.

These provisions guide the structural design of retaining walls in Arkansas where the IRC applies.

Front Yard Setback Requirements

Arkansas does not have a statewide front yard setback specific to retaining walls, setbacks are established by local zoning ordinances. In many cities:

  • Retaining walls cannot be within certain sight triangles near intersections. (e.g., Bentonville prohibits walls over 30 inches in clear view zones).
  • Distance from property lines and easements often affect how walls are sited, and local planning/zoning departments should be consulted for front‑yard setbacks.

Local Jurisdiction Requirements

Bentonville

  • Permit Requirement: Retaining walls over 4 feet in height (measured from the final grade on the lower side to the top of the wall) require a retaining wall permit.
  • Engineering Requirement: A licensed professional engineer’s design and seal are required for retaining walls over 4 feet when:
    • The wall height multiplied by 1.5 encroaches on a setback or adjacent structure, or
    • The wall is adjacent to a public right‑of‑way.
  • Process: Applications must be submitted online through the City of Bentonville eTrakit system. Required submittals typically include a plot/site plan showing property lines, utilities, drainage paths, wall elevations, and construction details. A final inspection is required to confirm compliance before project approval.

Little Rock

  • Permit Requirement: Building permits are required for construction activities, including structural retaining walls under the city’s building code enforcement, which reviews plans through its Planning & Development Department and Engineering Division.
  • Process: Contact the Building Codes Division Building Permit Desk to determine the specific application steps. While specific retaining wall language isn’t published separately, structural walls taller than low decorative features generally trigger permitting.

Fayetteville

  • Permit Requirement: Building and grading permits, including commercial building permits, are required for structures like retaining walls over 4 ft high.
  • Process: Permits are managed by the city’s Permitting and Building Safety Division, which enforces local codes based on the state‑adopted standards. Site plans and compliance with zoning/drainage rules are typically required.

For other cities, building permits for retaining walls are usually handled by the local building department based on the IRC/IBC framework. Contact your local city or county building or planning department to confirm specific application, plan, and engineering submission requirements. Learn more about our engineering services in Arkansas here.