Anne Arundel County R1 lots limited to 35% impervious; R2 to 40%; R5 to 50%. Critical Area properties capped at 15% impervious (Resource Conservation Area) or 25% (LDA/IDA).
Anne Arundel County Code Article 18 governs maximum impervious surface. R1: 35% lot coverage. R2: 40%. R5: 50%. Coverage calculated from structures, driveways, patios, pools, and other hard surfaces. Permeable pavers receive 50% credit in some cases. Chesapeake Bay Critical Area has stricter limits: Resource Conservation Area (RCA) 15% max impervious; Limited Development Area (LDA) 25% max; Intensely Developed Area (IDA) per underlying zoning but with stormwater offset required. Lots exceeding must apply variance through the County Board of Appeals or reduce coverage.
Exceeding coverage: removal required. Fines $500-$2,500. Critical Area violation: $1,000 per day.
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