Floor-Area Ratio (Coeficiente de Aproveitamento)

The Floor-Area Ratio (Coeficiente de Aproveitamento, or CA) is the index that, multiplied by the lot’s area, sets the total buildable area allowed on that lot under municipal zoning. Together with the lot-coverage ratio and minimum setbacks, it’s one of the core parameters of urban planning control.

• Basic ratio: the multiple that can be built free of charge, with no extra payment. In Florianópolis, the basic ratio is 1 for most residential zones (Complementary Law 482/2014, as amended by Complementary Law 739/2023).
• Maximum ratio: the multiple that can be reached by paying the Paid Building Rights Grant (OODC). The maximum ratio varies by zone — it can be 2, 3, or 4 in denser zones.
• Computable vs. non-computable area: municipal law defines which areas count toward the ratio calculation (parking spaces, balconies, and basements are often treated differently). It’s essential to check the specific municipal law to know exactly what is counted.
• Impact on land value: lots with a high maximum ratio in sought-after zones command a significantly higher price per square meter, since they allow more sellable area to be built. Analyzing buildable potential is a key factor in pricing land for development.
• Prior consultation: before buying land for development in Florianópolis, it’s mandatory to consult IPUF (the Florianópolis Urban Planning Institute) or the Municipal Department of the Environment and Urban Development to confirm the zoning, the ratio, and other applicable urban planning parameters.

In Florianópolis, the Master Plan (Complementary Law 482/2014) and its later updates define zones with a maximum ratio between 1 and 4, depending on location. Neighborhoods like Agronômica, Trindade, Estreito, and Coqueiros have higher ratios and concentrate mid- and high-end vertical developments. In the coastal zone and in preservation areas, the limits are more restrictive and the ratio can fall below 1.