The Lake County UDO limits building coverage by district: 35% of the lot in R-1 and 40% in R-2 and R-3. Only roofed building areas count; uncovered decks do not.
Table 2-3 of the Lake County UDO sets maximum building coverage — the total lot area covered by principal and accessory buildings — at 25% in A-1, 35% in R-1, and 40% in R-2 and R-3 districts. The UDO defines building coverage as the total area of a lot covered by principal and accessory buildings, counting only building areas beneath a roof; a roofed porch counts, but an uncovered deck does not. Solar panels and arrays are excluded from lot coverage calculations. These limits apply to unincorporated land under the Plan Commission; incorporated cities and towns within Lake County set their own coverage standards.
Exceeding building coverage creates a nonconforming or violating structure; unresolved zoning violations are nuisances per se with citation penalties up to $2,500 (first) and $7,500 (subsequent) under IC 36-1-3-8.
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