Ground/Plot Coverage Calculator
Calculate a building's ground coverage percentage, and the max footprint at an allowed limit.
About this calculator
Development regulations typically cap not just total buildable area but also how much of a plot's ground footprint a building can occupy, leaving room for setbacks, open space and light and air between structures, and checking a design against that limit means comparing two different figures. This calculator divides a building's footprint area by the plot's total area to compute the actual ground coverage percentage, and separately multiplies plot area by an allowed coverage percentage to show the maximum footprint permitted under local regulation, letting you check a proposed design against the legal limit in one step. Enter plot area, your planned footprint and the locally permitted coverage percentage, and immediately see whether the design fits within the allowed limit or exceeds it. Because permitted ground coverage varies by zone, plot size and building type, confirm the exact percentage your specific plot is subject to with the local development authority before finalizing any design.
Worked example
960 sqft footprint on a 2,400 sqft plot
Result: Ground coverage = 40%
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