What the Columbia zoning ordinance says about lot coverage, district by district. Section numbers link to the official ordinance.
CD-2 has no numeric impervious surface coverage cap in Table 4.3.1-A (shown as NR, not regulated). Stormwater rules in Title 14 Chapter 4 of the municipal code and the supplemental standards of Article 6 still apply, so site design is not unconstrained. Confirm current drainage requirements with Development Services.
CD-3L has no numeric impervious surface coverage cap in Table 4.3.1-B (shown as NR, not regulated). Stormwater management under Title 14 Chapter 4 of the municipal code still applies to land disturbance and drainage design.
CD-3 caps impervious surface coverage at 50 percent max per Table 4.3.1-C. This includes buildings, driveways, and other impervious areas; verify how the city counts gravel and permeable systems with Development Services before finalizing site coverage.
CD-4 caps impervious surface coverage at 80 percent max. Lot or building site width: House 38 ft min if alley loaded garage at rear, otherwise 50 ft min; Duplex 30 ft min per unit; density 12 density units per acre max and block perimeter 2,400 ft max on Development Parcels.
CD-4C caps impervious surface coverage at 80 percent max and allows 24 density units per acre max on Development Parcels. Lot dimensions by building type are in the Lot Occupation rows of Table 4.3.1-E.
CD-5 allows up to 100 percent impervious surface coverage per Table 4.3.1-F. Stormwater requirements under Title 14 Chapter 4 of the municipal code still apply to redevelopment and land disturbance.
CD-5C allows up to 100 percent impervious surface coverage per Table 4.3.1-G, with stormwater management under Title 14 Chapter 4 of the municipal code still applying.
SD-MHP caps impervious surface coverage at 35 percent max per Table 4.3.1-H.
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