A Bengaluru buyer likes a five-storey apartment building on a narrow lane in an older part of the city, until a lawyer points out that the sanctioned plan allowed only four floors. The extra floor is not a bonus; it is a violation of the permitted floor area ratio, and it can mean the building lacks a valid occupancy certificate, cannot be regularised easily, and carries a demolition risk. In 2026, understanding FAR is how a buyer tells a legally sound building from one that is quietly over-built.

The short answer. FAR, the floor area ratio, also called FSI or floor space index, is the ratio of the total built-up floor area a building may have to the area of its plot, and it caps how much can legally be constructed on a site. In Bengaluru it is set by the planning authority based on the plot size, the width of the abutting road and the zone. The trade-off buyers must grasp is that a building exceeding its sanctioned FAR may offer more space now but carries real legal risk, from a withheld occupancy certificate to demolition of the excess.

Quick facts for July 2026: FAR and FSI mean the same thing, the permitted ratio in Bengaluru rises with wider abutting roads and varies by zone under the master plan, and construction beyond the sanctioned FAR is unauthorised. Always check the sanctioned plan against what is actually built before you buy.

What is FAR or FSI, in plain terms?

FAR is simply the total floor area of a building divided by the area of the plot it stands on. If a plot is 1,000 square feet and the permitted FAR is 1.75, the builder may construct up to 1,750 square feet of total floor area across all floors. Floor space index, or FSI, is the same concept under a different name, so the two terms are interchangeable in Bengaluru and across most Indian cities.

The ratio matters because it is the single number that controls how much building a plot can legally support. A higher FAR allows more floors or larger floor plates and therefore more saleable area, which is why developers value plots that command a high FAR. For a buyer, FAR is the yardstick against which you check whether a building is within its legal envelope or has quietly exceeded it.

How is FAR decided in Bengaluru?

The planning authority fixes the permitted FAR for a plot based mainly on the plot size, the width of the road it abuts, and the zone in which it falls under the master plan. Wider roads generally permit a higher FAR, because they can carry the extra traffic and density that more floor area brings, while narrow lanes attract a lower FAR. Residential, commercial and mixed-use zones each carry their own norms.

This is why two similar-sized plots can support very different buildings: one on a wide arterial road may command a substantially higher FAR than an identical plot on a narrow internal lane. Some corridors, particularly around transit, allow additional or purchasable FAR to encourage density near stations. For a buyer, the practical takeaway is that the legal building size is site-specific, and the sanctioned plan is the document that records what was actually permitted.

Why does FAR matter to a home buyer?

Because a building that exceeds its sanctioned FAR is unauthorised to that extent, and the consequences land on the owner. Exceeding FAR can mean the project is denied an occupancy certificate, which in turn affects your ability to get water and power connections in your name, to obtain an A khata, and to secure a clean home loan. It also exposes the excess construction to regularisation demands or, in serious cases, demolition.

These risks connect directly to documents a buyer already checks. A property built beyond its FAR often struggles to get an A khata rather than a B khata, a distinction we explain in our guide to A khata versus B khata in Bengaluru. FAR compliance, the occupancy certificate and the khata status are three views of the same underlying question: was this building constructed within the law.

How do you check whether a building respects its FAR?

Compare the sanctioned building plan with what has actually been constructed. The sanctioned plan states the permitted FAR and the approved number of floors and built-up area, so an extra floor or an enclosed area that was meant to be open parking is a visible red flag. Ask for the sanctioned plan and the occupancy certificate, and check that the building on the ground matches the paper.

Pay attention to common violations: an additional floor beyond the sanction, balconies or stilt parking enclosed and sold as living space, and setbacks encroached upon. These are exactly the kinds of deviations that a careful reading of the builder-buyer agreement and the approvals can surface, as we set out in our guide to builder-buyer agreement clauses to check in Bengaluru. If the built form does not match the sanctioned FAR, treat the discount as a warning, not a bargain.

What factors change the permitted FAR?

Several site-specific factors move the FAR up or down, and knowing them helps you judge whether a building's size is plausible. The table below sets out the main drivers for a Bengaluru buyer in 2026.

Use the table to sanity-check a building's height and bulk against its site: a large building on a wide road in a high-FAR corridor can be perfectly legal, while the same bulk on a narrow lane invites a closer look at the sanction.

Can extra FAR ever be legitimate?

Yes, and it is important not to treat every dense building as a violation. Some plots legitimately command a high FAR because of a wide abutting road or a location in a transit-oriented corridor where the authority permits greater density. In some cases developers can also access additional purchasable FAR or use transferable development rights to build more, entirely within the rules, provided the extra area is properly sanctioned and reflected in the approved plan.

The distinction that matters is sanctioned versus unsanctioned. Extra floor area that appears on the approved plan and is backed by the relevant premium or transfer is legitimate; extra area that exists on the ground but not on the sanction is not. So the question is never simply whether a building is large, but whether its size is supported by the paperwork. Judge the sanction, not the silhouette.

A seven-point FAR checklist for Bengaluru buyers

1. Ask for the sanctioned building plan and note the permitted FAR and approved floors.
2. Compare the sanctioned plan against what is actually built on the ground.
3. Watch for an extra floor, enclosed stilt parking or encroached setbacks as violation signs.
4. Confirm the project holds a valid occupancy certificate consistent with its FAR.
5. Check whether any additional FAR is genuinely sanctioned through a premium or transfer, not just built.
6. Link FAR compliance to the khata status, since violations often show up as a B khata.
7. Treat a heavily over-built building on a narrow road as a legal risk, not a space bonus.

Work through these and FAR stops being an abstract planning term and becomes a practical test of whether the home you are buying is legally sound. The buyers who get caught are usually those who saw extra space as a bonus; the ones who stay safe asked whether that space was ever sanctioned in the first place.

Are FAR and FSI the same thing?

Yes. FAR, the floor area ratio, and FSI, the floor space index, are two names for the same measure: the ratio of a building's total floor area to the area of its plot. The terms are used interchangeably in Bengaluru and across India. Whichever term a document uses, it is describing how much floor area may legally be built on the site.

What happens if a building exceeds its sanctioned FAR?

Construction beyond the sanctioned FAR is unauthorised. It can lead to the project being denied an occupancy certificate, difficulty getting utilities and an A khata in your name, complications with a home loan, and exposure to regularisation demands or demolition of the excess. Because these consequences fall on the owner, an over-built building is a legal risk a buyer inherits, not a space bonus.

How do I find the permitted FAR for a Bengaluru property?

The permitted FAR is recorded in the sanctioned building plan, which is fixed by the planning authority based on the plot size, the abutting road width and the zone under the master plan. Ask the developer or seller for the sanctioned plan and the approvals, and check the built structure against it. A professional can confirm the applicable FAR norms for the specific site.

Is a high-FAR building always a violation?

No. Some plots legitimately command a high FAR because of a wide abutting road or a transit-oriented corridor, and developers can sometimes access additional sanctioned FAR through a premium or transferable development rights. The key distinction is whether the extra floor area appears on the approved plan. Sanctioned high FAR is legal; floor area that exists only on the ground and not on the sanction is not.

Last updated 2026-07-01. PropNewz Team.