Noblesville, IN Building Setbacks & Zoning: Lot Coverage Limits (2026)

The City of Noblesville treats 'lot coverage' as its own defined term rather than a single citywide percentage. Section 159.016 defines LOT COVERAGE as the ratio of the enclosed ground floor area of all buildings on a lot to the total lot area, and defines LOT COVERAGE, MAXIMUM more broadly as the percentage of a buildable lot that impervious surface can cover, expressly including principal buildings, accessory structures, parking areas, driveways, and walkways, not just roofed floor area. The actual cap then depends on which district or development type applies.

In the Residential Mobile Home Park (RMH) District, § 159.106(G)(6) sets a flat maximum lot coverage of 65% for mobile home parks and subdivisions, listed alongside the district's tract size, density, and setback standards. In a Zero Lot Line (ZLL) Overlay development, § 159.109(B)(4)(e) instead caps total lot coverage for all buildings on a site at 50% of the lot area, counting accessory uses toward that limit. Standard single-family, two-family, and multi-family residential districts (SR through GB and DT) carry their own maximum lot coverage figures set out in Table 8.B under § 159.106, alongside floor area ratio and minimum floor area requirements for the same districts.

Because impervious surface, not just roofed building area, counts toward the maximum in the LOT COVERAGE, MAXIMUM definition, a driveway or parking expansion can push a site over its limit even without adding new building footprint, and the Planning and Development Department checks coverage during site plan and improvement location permit review.