Gaston County, NC Building Setbacks & Zoning: Lot Coverage Limits (2026)
Key Facts
- Standard zoning tables
- No lot-coverage cap
- Long Creek WS-II critical area cap
- 6% built-upon
- Buffalo Creek WS-III balance cap
- 24% built-upon
- Special Intensity Allocation ceiling
- Up to 70% on limited acreage
- Permit required in watershed districts
- Watershed Protection Permit (§ 15.5.8)
- Criminal penalty
- Up to $500/day (§ 15.2.6)
Summary
Gaston County's standard zoning tables set no maximum lot-coverage percentage; Tables 7.1-2 through 7.1-5 regulate lot size, setbacks, and height but never cap building or impervious coverage. The real coverage limit lives in Chapter 15's Water Supply Watershed Regulations, which cap built-upon area inside the county's mapped watershed districts, from six percent in a critical area up to 24 percent or more in a balance-of-watershed district.
C.Buffalo Creek WS-III-BW (Balance of Watershed), referred to as: BCWSIII-BW. In order to maintain low to moderate land use intensity, single family detached uses shall develop at a maximum of two dwelling units per acre (2 du/ac). All other residential and non-residential development shall be allowed at a maximum of 24 percent built-upon area. In addition, new development and expansions to existing development may occupy ten percent of the balance of the watershed area with up to 70 percent built-upon area when approved as a Special Intensity Allocation (SIA).
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 58 | Unified Development Ordinance: Supplement 3).
Full Breakdown
1-5 govern minimum lot area, lot width, and setbacks for every general zoning district in the county, but none of those tables include a maximum lot-coverage, building-coverage, or impervious-surface-ratio column for standard residential, office, commercial, or industrial districts. 'Impervious Surface Ratio' is a defined term in the ordinance's definitions section, but it is not tied to a numeric ceiling outside the watershed chapter. That numeric ceiling exists in Chapter 15, Water Supply Watershed Regulations, adopted under state law and covering the mapped Watershed Protection districts that overlay parts of unincorporated Gaston County (and, by interlocal agreement, parts of Bessemer City, Cherryville, Dallas, and Stanley).
2 sets a different built-upon-area cap for each watershed classification: six percent in the Long Creek WS-II critical area, 12 percent in the Long Creek and Indian Creek WS-II balance-of-watershed areas (with up to 70 percent allowed on a limited share of the watershed under an approved Special Intensity Allocation), 24 percent in the Buffalo Creek WS-III balance-of-watershed area, and 24 percent, or 36 percent for projects without curb and gutter, in the Catawba River, South Fork River, and Mountain Island Lake WS-IV districts. 8 must issue before any built-upon area is added within these districts.
Violations & Fines
Adding built-upon area beyond a watershed district's cap, or building without the required Watershed Protection Permit, is a misdemeanor under Section 15.2.6, punishable by up to $500 per offense with each day of continuing violation a separate offense. The Board of Commissioners may also pursue a civil penalty of $100 per day under Section 15.2.7, in addition to injunctive relief to restrain or abate the violation.
Frequently Asked Questions
Does Gaston County limit how much of my lot can be covered with buildings or pavement?
What's the impervious limit inside a watershed protection area?
Who enforces the watershed built-upon area limits?
Sources & Official References
Other rules in Gaston County
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