Floor space index (FSI) is a type of development control metric used in Bangkok. This metric calculates the total permissible floor area allowed on a plot of land.
Authorities like the Bangkok Metropolitan Administration set FSI limits to regulate urban density.
FSI differs from other development metrics such as plot ratio and coverage ratio. Plot ratio measures the total floor area of a building against the total area of its plot, while coverage ratio assesses the footprint of a building against the land area.
FSI specifically limits the vertical expansion of buildings, controlling urban skyline and density effectively.
Popular FSI features include its use in zoning regulations, influence on real estate prices, and impact on urban planning. Zoning regulations use FSI to designate areas for residential, commercial, or industrial development.
Real estate prices often correlate with FSI values, higher FSI potentials usually command higher land prices. Urban planning utilizes FSI to manage city density, ensuring balanced development across districts.
Common FSI features comprise restriction enforcement, calculation methods, and amendment procedures. Authorities enforce FSI restrictions to prevent overdevelopment.
Calculation methods for FSI involve dividing the total built-up area by the plot area. Amendment procedures allow for changes in FSI values, accommodating urban growth and development needs.
Unusual FSI features in Bangkok include bonus FSI for provision of public amenities, differential FSI rates based on location, and FSI incentives for heritage property conservation. Developers may receive bonus FSI for including public parks or community centers in their projects.
Differential FSI rates encourage development in less congested areas. FSI incentives for heritage property conservation help preserve Bangkok’s cultural landmarks.
Unique FSI features pertain to Bangkok’s specific urban development policies. Examples include tiered FSI based on proximity to public transit, FSI exemptions for eco-friendly projects, and variable FSI for mixed-use developments.
Proximity to mass transit can result in higher FSI allowances. Eco-friendly projects may benefit from FSI exemptions, promoting green development.
Mixed-use developments enjoy variable FSI, encouraging diversified urban spaces.
FSI differs from similar metrics through its direct impact on building height and urban form. While plot ratio and coverage ratio influence density and land utilization, FSI uniquely controls vertical development scales.
This distinction makes FSI a critical tool in shaping Bangkok’s urban landscape and ensuring sustainable growth patterns.
For more details on FSI and other real estate concepts, refer to our glossary about Bangkok real estate.