Caddo Parish, LA Building Setbacks & Zoning: Lot Coverage Limits (2026)

Table 4-1 of the Unified Development Code, tied to Section 4.2.C.1, sets maximum building coverage and maximum impervious surface separately for each residential zoning district. In the parish's lowest-density districts, coverage runs 25% in R-A, 40% in R-E, 40% in R-1-12, 35% in R-1-10, and 50% in R-1-7, while impervious surface (which includes driveways, patios, and other hardscape in addition to the building footprint) runs 40%, 45%, 50%, 60%, and 60% respectively. Coverage climbs in the smaller-lot and denser districts: R-1-5 and R-UC allow 55% building coverage and 65% impervious surface, R-HU allows 50% coverage and 70% impervious surface, and R-TH allows 55% coverage with 70% impervious surface.

In the multi-family R-2, R-3, and R-4 districts, single-family, attached single-family, two-family, and townhouse structures are capped at 45% lot coverage with 70% impervious surface, while the R-MHS manufactured home subdivision district holds to a tighter 40% lot coverage and 70% impervious surface. Because the two limits are tracked separately, a lot can be under its building-coverage cap and still be blocked from adding a driveway or patio if the impervious-surface cap is already reached, and vice versa; both figures are computed against the total lot area under the Code's Section 2.4 measurement rules.