Accessory dwelling units in Columbia, TN

What the Columbia zoning ordinance says about accessory dwelling units, district by district. Section numbers link to the official ordinance.

All districts

Accessory Dwellings are allowed where Table 4.3.9.A-2 designates them for the district, subject to the Section 4.3.9 standards: only one Accessory Dwelling per lot or building site; it must be accessory to a House or Townhouse used for household living; if detached, it must be at least 10 feet from the primary dwelling; habitable space is capped at 600 sq ft in all districts except CD-2, where the cap is 1,000 sq ft; and it must share ownership and utility connections with the primary dwelling. Confirm the district's designation in Table 4.3.9.A-2 and any overlay review before design.

Section 4.3.9 (Accessory Dwelling standards) and Table 4.3.9.A-2 (Accessory Uses)

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