Which North Carolina building code governs the construction of single-family residential dwellings?
Correct Answer
A) NC State Building Code - Residential
The NC State Building Code - Residential governs construction of single-family residential dwellings in North Carolina.
Why This Is the Correct Answer
North Carolina has a state-specific residential building code — the NC State Building Code: Residential — that applies to single-family and duplex dwellings. NC adopts and amends the International Residential Code (IRC) under its own state supplement, so the NC Residential Code is the governing document, not the raw IBC or IRC alone.
Why the Other Options Are Wrong
Option B: International Building Code only
The International Building Code (IBC) governs commercial and multi-family structures exceeding certain thresholds — it does not directly govern single-family residential construction in NC. NC adopts the IRC (not IBC) as the basis for residential work, then adds state amendments.
Option C: NC State Building Code - Commercial
The NC State Building Code: Commercial applies to commercial structures, public buildings, and multi-family residential projects above the scope of the residential code. It does not govern single-family homes.
Option D: Local municipal codes only
Local municipal codes alone do not have independent authority over single-family residential construction in NC. While municipalities can adopt amendments, the state residential code is the primary governing document. Local codes cannot be less restrictive than the state code.
Memory Technique
R = Residential = single-family homes. C = Commercial = businesses and larger buildings. The letter of the code tells you the building type it covers.
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