Multiply the General Plan FAR by the lot square footage to get **the maximum floor area ratio**. This number should not be greater than the total gross floor area (square feet) of the building's floors. The general plan map should show approved uses for the site, so look at what else can be built there based on zoning and land use regulations.

The general plan is the key document for finding the maximum building area. It usually shows proposed uses for the site. If some of these uses are allowed under the zoning code then you can build up to it. Otherwise, you cannot build more than what is shown on the general plan map.

The general plan maps used by cities to determine development rights are legal documents that reflect the city's policy on development. They typically show proposed changes to **the zoning code** as well as land use policies such as minimum lot sizes and density restrictions. The maps may also include information about **required community facilities** such as parks or libraries. These documents are important tools for understanding the city's position on development issues within its boundaries.

Cities use several methods to create their general plans. Some cities have an official planning department that creates the plan while others have **outside consultants** do it for them. No matter who does the drafting, though, the plan needs to be approved by the city council or other government body before it can be implemented.

Multiply the length and breadth to get the measurement of the main area. To check that this measurement is correct, use a calculator. For example, if the room is 12 feet wide and 12 feet long, the floor area is 144 square feet. The entire floor area is the outcome of your calculation. If you want to find the actual area of the room, then divide the result by 4.

The area of a room is used to determine heating and cooling costs as well as set a price per square foot. The more square feet there are in a room, the higher the cost per square foot. Rooms that are small have **a high cost** per square foot because they require **more heat** or air conditioning to cool or warm **the same amount** of space.

Area is also used to determine **the maximum occupancy number** for a room. The formula is: Occupancy rate = Number of people +- 0.5. So if there are four people in a room, then the occupancy rate is 100 percent.

If the occupancy rate is 150 percent, then you can assume that up to six people will be comfortable in the room. If it's 200 percent, then eight people may stay without causing problems with storage or seating arrangements.

Rooms are usually assigned an "area" based on the dimensions of the room itself. A rectangle is divided into **two equal areas** by one of its sides.

If the plot of land utilized for a project is 500 square feet and the FAR established for **that city/locality** is 1.5, the total floor space that may be built is 750 square feet (500x1.5). If one wants to be precise, then the total floor area should be equal to 75 square meters.

The word "square" here means "meter squared". So the total floor area is the product between the length x the width of **your building site**. For example, if the building site is 10 meters long and 20 meters wide, the total floor area is 300 square meters. This number can be divided by the number of floors to obtain the total number of meters 2 high x 12 meters wide x $40,000 (the price of a square meter in New York City), which is the cost per square foot.

This is also known as **the buildable area**. The less-than-ideal part is that the more expensive the real estate, the smaller this number becomes. In other words, there's not much room for error when calculating the buildable area. If you estimate it incorrectly, you might end up with **too small a space** which would cause problems during construction.

However, even with these limitations, this is still a very useful number to have in mind while planning a building project.

The floor area of a building is a measurement of the amount of usable space in a structure (including its attachments) after the end of its construction, and it is measured in square metres (m2). The external perimeter of the building's outside walls delineates the boundaries of **the recorded floor space**. The number of meters per square meter is called the density of the building material. The term "floor area" can also refer to the total area enclosed by these boundaries.

In the United States, the Federal Housing Administration (FHA) requires that new homes be sold with a minimum floor area of 1,000 square feet (93 m2). Some newer homes are being built with larger floor areas because many Americans now want bigger houses. A house with a floor area of 1,500 square feet (139 m2) would be considered large.

In Canada, floor area is usually specified by the number of square meters. One square meter is equivalent to one square foot, or 0.9144 m2. So, a room with **a surface area** of 10 m2 must have a height of at least 2.5 m to remain habitable.

In Australia, the government agency responsible for insuring loans taken out by home owners is known as **the Australian Financial Services Licensee** (AFSL). The AFSL limits how much floor area a single borrower can have in a property. If you have multiple lenders, each lender needs to meet **this requirement** separately.

The built-up area, for example, is 1000 square feet, and the carpet area is specified as **80 percent**. This means that just 800 square feet of the space is usable-1000*80/100 =800 sq ft. The patio, rooms, balcony, baths, kitchen, and any other useable area in the house are all examples of **usable space**. The rest is not useful and cannot be rented out or sold.

Utilizable space is space that can be rented out or used for another purpose. For example, the living room is utilizable space because it can be used to rent out bedrooms or offices. Unutilizable space includes areas such as closets and storage spaces that are not available for rent or other use. For example, the basement is considered unutilizable space because it's not able to be rented out or used for anything else.

Built-up areas are calculated by taking the total floor area of a building and then dividing it by the number of occupied apartments. So, if there are four apartments in a building, each one has an average floor area of 50 square feet, and the building has an overall size of **300 square feet**, then the built-up area is 75 square feet.

Units that have two or more rooms can also be divided up into built-up areas. For example, if a unit has **one bedroom** and a den, its built-up area would be the same as that of a single-room apartment.

Measure **the internal length** and width of the building's walls. To calculate **the square footage**, multiply the length and width measures by two. Calculate the square footage by multiplying it by the number of storeys in the building. The ground floor is the first story under construction or open air.

For example, if a building has walls that are 24 feet long and 12 feet wide on **each floor**, then its total square footage is 3,648 square feet. The ground floor covers 324 square feet so there is almost one square foot of floor space for every four square feet of wall space.

You can also use this formula to find the ground floor area of a building: (width of building) × (length of building) = floor area of ground floor.

For example, if a building has walls that are 30 feet long and 10 feet wide on each floor, then its total square footage is 4,**320 square feet**. The ground floor covers 320 square feet so there is almost one square foot of **floor space** for every four square feet of **wall space**.

You can also use this formula to find the ground floor area of a building: (width of building) × (length of building)

So, the ground floor area of this building is: 30 × 24 = 360 square feet.