Building Setbacks & Zoning in Johnston County, NC (2026)
3 rules for unincorporated Johnston County, North Carolina.
Verified from official government sources
Setback Rules
In Johnston County's agricultural-residential district, Section 14-75(d) sets the yard setbacks for one-dwelling-per-acre development: 70 feet from arterial or collector streets, 50 feet from local streets outside major subdivisions, 25 feet inside major subdivisions, ten feet from interior lot lines, and 15 feet from access easements.
Johnston County AR District Setback Minimums
Some RestrictionsJohnston County Code § 14-75(d)
(d) Minimum building setback requirements. (1) The minimum building setback from a property or right-of-way line for a one dwelling unit per acre development shall be as follows: a. From any arterial or collector street, 70 feet. b. From any local street not in a major subdivision, 50 feet. c. From any local street in a major subdivision, 25 feet. d. From any interior lot line, ten feet. e. Fro...
Structure Height Limits
Johnston County caps building height in the agricultural-residential district at a flat 40 feet for residential structures. Section 14-75(e) sets that single maximum for the district governing most unincorporated land outside town limits, with no separate allowance for larger lots, higher density, or accessory structures built alongside the home.
Johnston County AR District Height Limit
Some RestrictionsJohnston County Code § 14-75(e)
(e) Maximum building height requirements. The maximum building height for residential structures shall be 40 feet.
Lot Coverage Limits
Inside Johnston County's Water Supply Watershed Protection District (WSW), lot coverage is capped by how much of a parcel is built upon: 24 percent in the critical area, and in the protected area 24 percent with curb-and-gutter streets, 36 percent without, or up to 70 percent with a county-approved stormwater best management practice.
Johnston County Watershed Built-Upon Area Limit
Some RestrictionsJohnston County Code § 14-105(m)(1)-(2)
(m) Built-upon area. (1) Critical area. The maximum area to be built upon for all residential development not listed in subsection (l) of this section and nonresidential development shall be allowed a maximum of 24 percent built-upon. (2) Protected area. The maximum area to be built upon for all residential development not listed in subsection (l) of this section and nonresidential develo...
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