Floor Area Ratio (FAR)

Floor Area Ratio (FAR) is one of the most important metrics in zoning and real estate development. It expresses the relationship between a building's total gross floor area and the total area of the lot it sits on. A FAR of 1.0 means you can build total floor area equal to the lot size — for example, a one-story building covering the entire lot, or a two-story building covering half the lot.

How FAR Works

• **FAR 0.5** = 5,000 sq ft of building (a modest single-story structure)
• **FAR 1.0** = 10,000 sq ft (one story covering the lot, or two stories covering half)
• **FAR 3.0** = 30,000 sq ft (a three-story building covering the lot, or taller and narrower)
• **FAR 10.0+** = 100,000+ sq ft (high-rise territory, common in urban cores)

Different jurisdictions may exclude certain areas from FAR calculations, such as parking garages, mechanical rooms, or below-grade space. These exclusions can significantly affect development feasibility.

Why This Matters for CRE

FAR is the single most direct zoning control on development economics. A FAR increase from 2.0 to 4.0 effectively doubles the buildable area on a site — and in many cases doubles the land value. When municipalities adjust FAR limits upward through rezoning or overlay districts, it is one of the clearest value-creation signals in zoning. Investors who track FAR changes can identify parcels where development potential is expanding before the market fully prices it in.

What to Watch For

• FAR bonus programs: Many cities offer FAR bonuses in exchange for affordable housing, public amenities, or green building features
• FAR reductions: A decrease in allowed FAR signals a municipality pulling back from growth, potentially reducing land values
• FAR vs. height limits: A generous FAR means nothing if height limits prevent you from building upward — always check both
• Contextual FAR: Some jurisdictions use sliding FAR scales based on lot size or proximity to transit