03
How to Calculate CA / FAR
Divide total computable floor area by lot area.
CA / FAR = computable floor area ÷ lot area04
Built Area and Computable Floor Area Are Not Always the Same
Local law determines which areas are included or excluded from the legal computation.
05
What CA 1, 2 or 4 Means
Mathematically, these represent one, two or four times the lot area as computable floor area.
06
CA / FAR Does Not Determine Legal Floor Count
Height, setbacks, envelope and other rules remain independent constraints.
FAQ
Frequently Asked Questions
Does this tool confirm project approval?+
No. It performs mathematical calculations using supplied values and does not replace municipal law, professional analysis or official approval.
Are the parameters the same across Brazil?+
No. Zoning limits and definitions vary by municipality, zone and the applicable version of local rules.