Rockdale County, GA Building Setbacks & Zoning: Lot Coverage Limits (2026)

Table 1, Development Standards for Residential Zoning Districts, at Rockdale County Code § 214-1, sets a maximum percentage of impervious surface for every residential zoning district in unincorporated Rockdale County. R-1, the standard single-family district with a 30,000-square-foot minimum lot, caps impervious coverage (buildings, driveways, patios and any other surface that sheds rather than absorbs stormwater) at 20 percent of the lot. R-2, the two-family duplex district on smaller 14,000-square-foot lots, allows more coverage, 30 percent, reflecting its higher density. The most restrictive districts sit at the conservation end of the table: W-P watershed protection allows only 10 percent impervious surface on its large-lot, low-density lots.

The Department of Planning and Development checks impervious coverage against the applicable table entry during site plan and building permit review, and § 214-1 directs that if a chapter 206 base-district standard ever conflicts with Table 1, the chapter 206 standard controls instead. Coverage figures in this table exclude any additional buffer or open-space set-asides required elsewhere in the Unified Development Ordinance, so a lot that meets the raw percentage can still be constrained further by stream buffers or conservation space requirements layered on top.