Lexington County, SC Fence Regulations: Retaining Walls (2026)
Key Facts
- Default status
- Retaining walls exempt from building permit
- Citation
- Sec. 14-262(3)
- Exemption lost when
- Wall supports surcharge or Class I/II/IIIA liquids
- Structural standard
- IBC/IRC as adopted by SCLLR, Sec. 14-172
- Enforcement
- Notice of violation under Sec. 14-442
- Penalty
- Misdemeanor, magistrate's court fine
Summary
Most retaining walls in Lexington County need no building permit under Sec. 14-262(3), but the exemption has a hard limit: any wall supporting a surcharge or impounding Class I, II, or IIIA flammable or combustible liquids loses the exemption and must go through the standard permit and inspection process.
Permits shall not be required for the following:
Building:
1. One-story detached accessory structures provided the floor area does not exceed 200 square feet (18.58 square meters).
2. Fences.
3. Retaining walls, unless supporting a surcharge or impounding Class I, II, or IIIA liquids.
4. Water tanks supported directly on grade if the capacity does not exceed 5,000 gallons (18,927 liters) and the ratio of height to diameter or width does not exceed two to one.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 20).
Full Breakdown
Sec. " A surcharge is an additional load bearing down on the wall from above, such as a driveway, parking area, structure, or steep fill; once a wall is engineered to hold one back, or to contain flammable or combustible liquids classified as I, II, or IIIA, the exemption disappears and the wall is treated like any other regulated structure. That means the owner or contractor must file the written application described in Sec. 14-263, identifying the work and the site and, where applicable, submitting construction documents, before the building official will issue a permit under Sec.
14-261. Because Division 1 adopts the International Building Code and International Residential Code "in the version most recently adopted by" the South Carolina Department of Labor, Licensing, and Regulation under Sec. 14-172, a non-exempt retaining wall must be designed to those structural standards, and, for a wall impounding Class I, II, or IIIA liquids, to the International Fire Code provisions referenced in Sec. 14-174(5). A retaining wall that loses the exemption is inspected under the same footing, foundation, and final-inspection sequence in Sec. 14-352 that applies to any other permitted structure.
Homeowners unsure whether their wall crosses the surcharge threshold can ask the building official for a determination and, if they disagree, file a written appeal under Sec. 14-412 with the Building Code Board of Appeals.
Violations & Fines
Building a permit-required retaining wall, one supporting a surcharge or impounding Class I, II, or IIIA liquids, without first obtaining a permit is an unlawful act under Sec. 14-441. The building official can issue a notice of violation under Sec. 14-442 ordering the work stopped and abated, and unresolved violations are prosecuted as a misdemeanor under Sec. 14-444, punishable by a magistrate's court fine, with each day the wall remains noncompliant treated as a separate offense.
Frequently Asked Questions
Do I need a permit to build a retaining wall in Lexington County?
What counts as a surcharge that triggers the permit requirement?
What happens if I build a non-exempt retaining wall without a permit?
Sources & Official References
Other rules in Lexington County
Compare Lexington County to another location·View the South Carolina fence regulations overview
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