R-4 Zoning

R-4 zoning represents high-density multi-family residential — apartment buildings with no fixed unit count cap, typically constrained only by building height limits, setback requirements, lot coverage maximums, and floor-area-ratio controls. R-4 is the zone type that accommodates mid-rise apartment development, making it the primary residential zone classification for significantly expanding housing supply in dense urban areas. Development standards in R-4 zones are the most permissive among traditional residential zone tiers, allowing greater building coverage and generally taller structures than R-1 through R-3.