Floor Area Ratio (FAR): Full Form, Meaning, Formula & Bangalore Rules

FAR stands for Floor Area Ratio the ratio of a building's total built-up floor area to the total area of the plot it stands on, and it is the primary regulation that determines how much you can build on any given piece of land. In Bangalore, FAR is governed by the BDA and BBMP under the Revised Master Plan 2015, with limits set according to road width, zone type and plot size. Understanding FAR is essential for plot owners planning construction, homebuyers evaluating apartment density and investors assessing a property's development potential.

Floor Area Ratio (FAR): Full Form, Meaning, Formula & Bangalore Rules

As first-time homebuyers, you will come across various real estate jargon, which will test your patience. One term that you will hear frequently is the floor area ratio (FAR). This concept shapes a city’s skyline and influences the design of your dream home as well as urban planning. So, what is FAR? How does it impact you? Let’s figure out.

What is FAR? Full Form & Meaning

FAR full form: FAR stands for Floor Area Ratio.

FAR meaning: Floor Area Ratio is the ratio of a building's total built-up floor area (across all floors) to the total area of the plot on which it stands. It is set by local planning authorities to control building density and ensure planned urban development.

FAR full form in construction: In construction and real estate, FAR and FSI (Floor Space Index) are used interchangeably in India. FAR is the more widely used term nationally; FSI is more common in Maharashtra.

It is the metric that determines the maximum permissible built-up area on a specific plot of land. The floor area ratio (FAR) is the relationship between a building’s total usable floor area and its total land area, making FAR in real estate a vital metric for understanding development potential. A higher FAR indicates denser construction in urban areas with limited space. Local municipal corporations establish the FAR for different zones within a city, ensuring controlled development.

FAR Formula and How to Calculate It

Calculating the FAR is a straightforward process. Here’s the floor area ratio formula:
FAR = Total Building Floor Area / Gross Lot Area

• Total Building Floor Area: The sum of the usable floor areas of all floors within the building, including the area occupied by external walls.
• Gross Lot Area: The entire land area of the property, including the area covered by the building and any open spaces within the property boundaries, extending up to the center line of adjacent roads.

Here’s a practical floor area ratio calculation example.

A land plot has a total area of 1,000 square feet. The FAR is set at 2.0 for that specific zone. To determine the maximum permissible built-up area:

• Calculate the Gross Lot Area
  The example mentions the total area as 1,000 sq ft. Hence, the gross lot area is also 1,000 sq ft.
• Apply the formula to calculate the floor area ratio
  FAR = 2.0 (given) x 1,000 sq ft (gross lot area) = 2,000 sq ft

Therefore, based on the FAR regulations, you can construct a building with a maximum total floor area of 2,000 square feet on this 1,000-square-foot plot.

FAR Formula

FAR = Total Built-up Floor Area ÷ Total Plot Area

Worked Example 1 — Basic Calculation

• Plot area: 2,400 sq ft
• Permissible FAR: 2.0
• Maximum built-up area = 2.0 × 2,400 = 4,800 sq ft

This means across all floors, the total built-up area cannot exceed 4,800 sq ft — regardless of how many floors you build.

Worked Example 2 — Bangalore Road Width Based

• Plot on a 40-foot road in Bangalore
• Plot area: 1,200 sq ft
• Permissible FAR for 40-foot road: 2.25 (indicative — verify with BDA/BBMP for your specific zone)
• Maximum permissible built-up area = 2.25 × 1,200 = 2,700 sq ft

FAR vs FSI - How Are They Different?

While exploring FAR, you might encounter another term, Floor Space Index (FSI). While both concepts deal with the permitted built-up area, a subtle difference exists. FAR is expressed as a decimal ratio, whereas FSI is represented as a percentage. The underlying principle for FAR and FSI calculation remains the same, but how they are communicated differs. India uses FAR, while FSI is more common in other countries.

FAR Rules in Bangalore: Road Width and Zone Limits

FAR in Bangalore is governed by the BDA (Bangalore Development Authority) and BBMP under the Revised Master Plan 2015. The permissible FAR depends primarily on the road width abutting your plot.

Indicative FAR by Road Width — Bangalore Residential:

Note: These are indicative values for residential use. Actual permissible FAR depends on your specific plot's zone, road classification and survey number. Always verify with BDA or BBMP before construction.

Premium FAR Policy (2025): Karnataka's Premium FAR Policy, gazetted in February 2025, allows developers to purchase additional FAR above the base limit on roads above 12 metres wide — up to 40% additional on 12–18 metre roads and up to 60% on roads above 18 metres.

How many floors can you build in Bangalore?

• 1,200 sq ft plot, 40-ft road, FAR 2.25 → max built-up 2,700 sq ft → approx. G+2 (if each floor ~900 sq ft)
• 2,400 sq ft plot, 60-ft road, FAR 3.25 → max built-up 7,800 sq ft → approx. G+4 or above

Is Basement Area Included in FAR?

Whether basement area counts towards FAR depends on how the basement is used:

In most residential apartment projects in Bangalore, basements are used for parking and utilities — and therefore do not count towards FAR. This is why developers can offer basement parking without it reducing the permissible residential floor area above ground.

How FAR Affects Residential Buildings

The following are some ways in which FAR influences the layout and design of residential apartments and other residential buildings, and how you live there:

• Open Space and Density
  A lower FAR translates to more open space within a residential project. This means better ventilation, natural light access, and a more spread-out living environment. Conversely, a higher FAR indicates denser development, less open space, and more congested living conditions.
• Building Height and Aesthetics
  Low FAR leads to low-rise buildings with a more aesthetically pleasing design. On the other hand, high FAR developments necessitate constructing taller buildings, which may only be visually appealing.
• Infrastructure and Amenities
  FAR regulations indirectly influence the availability of fundamental infrastructure within a project. Due to ample open space, lower FAR allows for more amenities like parks, playgrounds, and recreational facilities.

In a nutshell, FAR regulations influence a development project’s overall design and functionality, impacting factors such as building height, aesthetics, infrastructure, and amenities. Developers must carefully consider these regulations to balance density and livability in their projects.

While FAR doesn’t directly influence property prices, it can have a cascading effect. Here’s how:

• Land Availability and Supply
  In areas with limited land availability, a higher FAR allows developers to construct more units on a single plot, increasing the supply of housing units. Due to increased competition, this can lead to price stabilization or even a price decrease.
• Project Amenities and Design
  Projects with lower FAR deliver more open space and amenities, which can be a significant selling point for buyers. This can command a premium price compared to high-rise buildings with limited open space constructed under a higher FAR.

Projects with lower FAR deliver more open space and amenities, which can be a significant selling point for buyers. This can command a premium price compared to high-rise buildings with limited open space constructed under a higher FAR.

How FAR Varies from City to City?

FAR regulations are not uniform across the country and even vary within different areas of the same city. For example, in Bangalore, well-established residential hubs like Whitefield, Electronic City, and Yelahanka may have different FAR limits based on factors like infrastructure capacity, population density, and zoning regulations.

• Population Density
  Densely populated cities with limited land availability tend to have higher FARs to accommodate more residents. Conversely, less densely populated areas might have lower FARs to encourage a more spread-out development pattern.
• Geographical Features
  Cities with geographical constraints like hills or water bodies might have limitations on building heights, impacting the FAR. For instance, a hilly region might have a lower FAR to prevent excessively tall buildings from obstructing scenic views or causing stability concerns.
• Infrastructure and Services
  The availability of infrastructure like water supply, sewage systems, and transportation networks plays a role in determining FAR. Areas with robust infrastructure can support a higher FAR, whereas regions with limited infrastructure might have a lower FAR to prevent overloading existing systems.
• Urban Planning Policies
  Local authorities establish urban planning policies for sustainable development and maintain a particular character within a city. These policies can influence FAR regulations, encouraging low-rise development in heritage zones or high-density development near commercial hubs.

FAQs

What is FAR full form?

FAR stands for Floor Area Ratio. It is the ratio of a building's total floor area to the plot area, used to regulate building density. In India, FAR and FSI (Floor Space Index) mean the same thing.

What is the permissible FAR in Bangalore by road width?

FAR in Bangalore varies by road width — approximately 1.75–2.25 for roads up to 30 feet, 2.25–2.5 for 40-foot roads, and 3.25–4.0 for roads above 60 feet. Always verify the exact FAR with BDA or BBMP for your specific plot and zone before construction.

Is basement area included in FAR in Bangalore?

Basement used for parking and utilities is not included in FAR. Basement used for commercial, habitable or storage purposes is included. Most residential apartment projects use basements only for parking, so they typically do not count towards FAR.

What is the difference between FAR and FSI?

FAR and FSI refer to the same concept. FAR is the predominant term used nationally in India; FSI is more commonly used in Maharashtra. Both express the ratio of total built-up area to plot area.

How many flats can be built in 1 acre in Bangalore?

At FAR 2.0 on 1 acre (approximately 43,560 sq ft), the maximum built-up area is around 87,120 sq ft. Dividing by an average flat size of 1,000 sq ft gives approximately 87 flats before deducting common areas. Actual numbers vary based on FAR, road width and setback requirements.

What is Premium FAR in Bangalore?

Premium FAR is an additional FAR that developers can purchase above the base limit, introduced by Karnataka's 2025 Premium FAR Policy. On roads of 12–18 metres, up to 40% additional FAR is available; on roads above 18 metres, up to 60% additional FAR can be purchased by paying a premium to the government authority.