City of Boulder Planning & Development Services
Maximum Floor Area Ratio (FAR) and Building Coverage Calculator
To calculate the Maximum Floor Area and Building Coverage for your lot: complete steps 1 & 2 below.
For more information, help and on-line resources you can click the links next to each step.
Steps Description
Select or
Enter Value
1
Select the property zoning district. Property zoning information can be found using the city's online property report.

2
Enter the property lot size in sq ft. Approximate lot size information can be found using the city's online property report
and click on the Calculate Button.

Required: Please enter the size of your lot.



*There are additional regulations not modeled by this calculator that may prevent you from being able to expand your home including a new bulk plane standard and new wall articulation standards, as well as regulations concerning setbacks, height limits, and solar shadows. This tool is for demonstration purposes only and is intended for general planning purposes only.