City of Boulder Planning & Development Services
Compatible Development Property Worksheet & Calculator
To determine a properties building size, floor area ratio, and building coverage complete steps 1 through 4 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.

HELP: Compatible Development Ordinance Summary

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

Required: Please enter the size of your lot.

HELP: Property Survey Requirements

3
Enter the existing property building(s) size in sq ft. For help see how to measure building size. Approximate building size information can be found using the Boulder County property record.

Required: Please enter the size of your bulidng.

HELP: How to measure building size

4
Enter the existing property building coverage (or footprint) in sq. ft. To determine how to measure building coverage see the help section. Approximate building size information can be found using the Boulder County property record.

Required: Please enter the size of your building coverage.

HELP: How to measure building coverage

Calculated Results*
 
Building(s) Size & Floor Area Ratio (FAR)
Building(s) Coverage
 
Maximum Building(s)
Size sq ft.
Maximum FAR
Maximum Building(s) Coverage sq ft.
Maximum Building(s)
Coverage Percent
 
 
Existing Building(s)
Size sq ft.
Existing FAR Ratio
Existing Building(s)
Coverage sq ft.
Existing Building(s)
Coverage Percent
 
 
Potential Additional Building(s)
Size sq ft.
Potential Additional FAR
Potential Additional Building(s) Coverage sq ft.
Potential Additional Building(s) Coverage Percent
 
  *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.