Understanding Floor Area Ratio (FAR)
The **Floor Area Ratio (FAR)** is a zoning tool that regulates building density. It is defined as the ratio of the total floor area of a building (Gross Floor Area or GFA) to the area of the lot on which it's built.
The FAR Formula:
$$\text{FAR} = \frac{\text{Total Building Floor Area (GFA)}}{\text{Lot Area}}$$ FAR is expressed as a decimal ratio, such as $\mathbf{0.5}$ or $\mathbf{3.0}$.
Interpreting the Ratio
Low FAR (e.g., $0.5$)
- **Meaning:** The GFA is half the lot area.
- **Example:** A 2-story building that only covers 25% of the lot footprint.
- **Typical Use:** Single-family residential zones and low-density areas.
High FAR (e.g., $3.0$+)
Meaning & Use
- **Meaning:** The GFA is three or more times the lot area.
- **Example:** A tall commercial building or apartment complex on a small urban lot.
- **Typical Use:** Downtown commercial districts and high-density residential zones.
Zoning Note:
Municipalities establish a **maximum FAR** for each zoning district. Your calculated FAR must be equal to or less than the maximum allowed for your proposed development to be approved.