Lot Coverage

Lot coverage is a zoning regulation that limits the percentage of a parcel that can be covered by buildings, structures, and sometimes impervious surfaces (such as driveways and patios). It works alongside setback requirements and FAR to control development intensity and preserve open space on individual lots.

How Lot Coverage Is Calculated

Different jurisdictions define "coverage" differently:

• Building coverage only: Just the building footprint counts
• Impervious surface coverage: Buildings plus driveways, patios, walkways, and other hard surfaces
• Total coverage: All structures including accessory buildings, pools, and decks

How Lot Coverage Interacts with Other Controls

Lot coverage works in combination with:

• Setbacks: Define where the building can be placed on the lot
• FAR (Floor Area Ratio): Controls total building area across all floors
• Height limits: Cap how tall the building can be

A developer must satisfy all of these simultaneously, and the most restrictive one often becomes the binding constraint.

Why This Matters for CRE

Lot coverage directly affects development feasibility, particularly for commercial and industrial properties where large footprints are needed for warehouses, retail, or manufacturing. When municipalities reduce lot coverage requirements (allowing more of the lot to be built upon), it increases property values by enabling larger buildings. Conversely, increased lot coverage requirements or stormwater regulations that count impervious surfaces can reduce developable area and project returns.

What to Watch For

• Lot coverage vs. impervious surface limits: Stormwater regulations increasingly limit total impervious area, which can be more restrictive than zoning lot coverage limits
• Coverage variances: A pattern of lot coverage variances suggests the existing standards are too restrictive for market demand
• Code updates: Municipalities modernizing their codes may adjust lot coverage to accommodate infill development or green infrastructure