Floor Area Ratio Wikipedia The floor area ratio (far) of the commercial building is 4.0x, which we determined by dividing the gross floor area (gfa) by the total lot size. floor area ratio (far) = 24,000 ÷ 6,000 = 4.0x. however, real estate development firms (or “property developers”) often derive the maximum allowable floor area based on the specific floor area. Similarly, if the floor space index fsi is 1.5 and you have a land of 1,000 sq ft, then, you can build up to 1,500 sq ft of covered structure. the far calculation formula is quite simple: plot area x floor space index = built up area. note: far of 1.5 is expressed as fsi of 150%. note that floor space index (fsi) is applicable on commercial.
Floor Area Ratio Far Formula And Calculation Guide Floor area ratio (far) is the ratio of a building's total floor area (gross floor area) to the size of the piece of land upon which it is built. it is often used as one of the regulations in city planning along with the building to land ratio. [1] the terms can also refer to limits imposed on such a ratio through zoning. The formulas for calculating fsi (floor space index) and far (floor area ratio) are relatively straightforward. here are the formulas for each: 1. fsi (floor space index) formula: fsi = (total permissible floor area) (land area) x 100. fsi is the floor space index, expressed as a percentage. Examples of the floor area ratio. the floor area ratio of a 1,000 square foot building with one story situated on a 4,000 square foot lot would be 0.25x. a two story building on the same lot where. Floor area ratio (far) is a mathematical formula that determines how many square feet can be developed on a property in proportion to the lot area. the property area is multiplied by the far factor; with the result being the maximum floor area allowed for a building on the lot. local zoning codes will assign a designated far based on the zoning.
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