FSI
Floor Space Index
A planning ratio used to regulate the amount of construction permitted on a plot.
Detailed Explanation
Floor Space Index, commonly called FSI, is a planning measurement used to regulate the total permissible floor area that can be developed relative to the plot area. In many contexts, FSI and FAR are used similarly.
In Plain Terms
FSI and FAR are often talking about the same basic idea: how much total building space you are allowed to create on a piece of land.
FSI is a ratio rather than a measurement unit and its use can depend on the applicable planning framework.
Related Terms
This definition is provided for general informational purposes only and is not legal, financial or tax advice. Property rules and authority policies can change — verify current requirements with the relevant authority or a qualified professional.