Floor To Lot Area Ratio Formula

Let s learn the concept of building coverage ratio or floor area ratio to understand how.

Floor to lot area ratio formula.

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. With the result being the maximum floor area allowed for a building on the lot. It is a tool used by the planning body of any city or town to identify densely constructed areas from the others. Floor area ratio or far is a critical decisive element for the legal construction of any residential or non residential building.

Far is expressed as a decimal number and is derived by dividing the total area of the building by the total. As a formula far gross floor area area of the plot. 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. For example if a building with 20 000 square feet of floor area has an osr of 20 4 000 square feet of open space would be required on the zoning lot 0 20.

If your lot is irregular divide it into a combination of these basic shapes calculate the area of each shape and. The open space ratio is the amount of open space required on a residential zoning lot in non contextual districts expressed as a percentage of the total floor area on the zoning lot. The property area is multiplied by the far factor. 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.

The same lot with a single story building of 3 000 square feet would have the same ratio of 0 75. Far g b far 20 000 ft 2 20 000 ft 1 0 figure 1. Floor area and lot area are two terms commonly used in zoning analysis. The square footage of the building includes all floors of the structure when calculating the floor area ratio.

What does far signify. If circular measure the diameter d and use the formula 1 2 x 3 14 x d 2. While often used in combination to determine other areas or ratios such as floor area ratio far for example the two have distinct differences and are defined differently by code. Example of how to use the floor area ratio.

Calculate the floor area ratio. It is often used as one of the regulations in city planning along with the building to land ratio. For example a two story building of 3 000 square feet on a 4 000 square foot lot has a ratio of 0 75. Floor area ratio far is the measurement of a building s floor area in relation to the size of the lot parcel that the building is located on.