Sanctioned Plan and Deviations: What a Bengaluru Flat Buyer Must Verify

A buyer we heard from had all but decided on a nearly finished apartment in east Bengaluru. The flat was bright, the price was fair, and only one small thing nagged at him. The building had one more floor than the brochure's older drawings showed, and the occupancy certificate was still pending. His lawyer put the two facts together in a sentence. The extra floor was very likely a deviation from the sanctioned plan, and that single fact could decide whether the building ever got its occupancy certificate at all.

The short answer. Every legal building is built to a sanctioned plan that fixes the number of floors, the floor area ratio, the setbacks, the height and the parking. A deviation is when what stands on the ground differs from that plan. Small deviations can often be regularised by paying a compounding fee, but larger ones can put a portion of the building on the demolition list and can block the occupancy certificate, which in turn raises your property tax and makes financing harder. The trade off is that a flat in a deviating building may look cheaper, yet without a clean occupancy certificate you inherit higher tax, loan trouble and risk, so verify the sanctioned plan against reality before you pay.

What a sanctioned building plan actually fixes

The sanctioned plan is the municipal approval that a builder must obtain before construction, and it is far more than a formality. It fixes how many floors may be built, how much total floor area is allowed through the floor area ratio, how far the building must sit from each boundary through setbacks, the permitted height, and the parking that must be provided. Together these decide the legal shape and size of the building.

For a buyer, the sanctioned plan is the yardstick against which everything else is measured. A flat is only as sound as the plan its building follows, because the plan is what the authorities will hold the structure to when they decide whether to issue an occupancy certificate. Reading it, and comparing it to the actual building, is the single most revealing check you can make on a nearly complete project.

What counts as a deviation

A deviation is any departure of the actual construction from the sanctioned plan. The most common in Bengaluru's residential stock are an extra floor beyond those approved, a higher floor area ratio than sanctioned, and setbacks on the ground that are smaller than the plan requires. Reduced parking and changes in the approved use are others. Some deviations are minor and almost invisible, while others reshape the building in ways that matter to safety and to law.

The reason deviations are so common is simple economics. Every extra floor or reduced setback squeezes more saleable area onto the same plot, which is profitable for a builder but risky for the buyer who inherits the consequence. Recent changes under the Greater Bengaluru framework have adjusted height, floor area ratio and setback norms, so what is permitted can shift over time, which makes checking the plan that actually applied to your building all the more important.

Why deviations matter: the occupancy certificate, tax and loans

Deviations matter because they flow straight into the occupancy certificate, which is the document certifying a building is legally fit to occupy. If a building deviates beyond what the rules allow and the deviation is not regularised, the authority can withhold the occupancy certificate, and an unresolved excess can even put that portion of the structure at risk of demolition. That is not a distant, theoretical risk in a city that has seen active enforcement against violations.

The knock on effects hit the buyer's wallet. A building without an occupancy certificate can attract higher property tax and is harder to finance, because many lenders are wary of funding a property that is not certified fit for occupation. Our guide on the occupancy certificate and completion certificate explains why that document is the one you should never waive, and the guide on FSI and FAR explains the floor area limits a deviation often breaches.

It also helps to separate a deviation from outright unauthorised construction. A deviation is a building that had a sanctioned plan but strayed from it, whereas an unauthorised structure never had a valid sanction at all. The first can sometimes be compounded and salvaged, the second is a far deeper problem. As a buyer, the practical test is the same in both cases: ask for the sanction, ask for the occupancy certificate, and treat their absence, not just their presence, as information you need before you decide anything about price.

Regularisation and the deviation limits

Not every deviation is fatal. The rules allow small deviations to be regularised, meaning the owner pays a compounding fee to the municipal body, after which the occupancy certificate can be issued. The key is the size of the deviation. Small departures within the permitted margin are usually compoundable, while deviations beyond that margin are far harder to fix and can leave the excess portion exposed to action.

As a buyer, treat regularisation as something to be proven, not promised. If a seller says the deviation is minor and will be compounded, ask to see the application and, ideally, the resulting order, rather than accepting a verbal assurance. Because the exact thresholds and compounding rules can change with policy, confirm the current position with the municipal body before you rely on any specific percentage.

There is also a timing point worth weighing. A deviation that is still awaiting regularisation is a promise, not a fact, and promises can stall for years while the building sits without a clean occupancy certificate. If you buy in that window, you take on both the wait and the uncertainty of whether the compounding will actually be granted. Many careful buyers simply decline to complete a purchase until the regularisation is done and the occupancy certificate is in hand, and price any earlier commitment to reflect that risk.

Sanctioned plan versus reality: what to compare

The most powerful check is a simple one, laying the sanctioned plan beside the actual building. The table below lists the parameters worth comparing and what a mismatch on each one means for you as a buyer.

How to verify before you buy

Ask the builder or seller for the sanctioned plan and its approval number, and do not accept a glossy marketing drawing in its place. For Bengaluru properties, the municipal building sanction records can be checked online, so you or your lawyer can confirm the approved floors, floor area ratio and setbacks and then compare them with what is actually standing. A physical count of floors and a look at the boundary gaps often tells the story before any document does.

If the numbers do not match, ask for a written explanation and the regularisation status before you commit. For a flat still on your shortlist, a project such as Purva Kensho Hills near Sarjapur is the kind of development where you should ask, up front, for the sanctioned plan and the occupancy certificate status rather than discovering a deviation after you have paid.

Your sanctioned plan checklist

Run these seven checks before you buy a flat in any Bengaluru building.

1. Ask for the sanctioned building plan and its municipal approval number.
2. Verify the approval against the municipal sanction records rather than a brochure.
3. Count the actual floors and compare them with the sanctioned number.
4. Check setbacks and parking on the ground against the plan.
5. Confirm whether the building has its occupancy certificate or why it is pending.
6. For any deviation, get the regularisation application and order in writing.
7. Have a lawyer compare the plan, the building and the occupancy status before you pay.

The bottom line for a Bengaluru buyer is that a building is only as legal as the plan it follows. Compare the sanctioned plan with what is actually built, insist on the occupancy certificate, and treat an unexplained extra floor or shrunken setback as a reason to pause. The prettiest flat in a deviating building can still cost you in tax, financing and, in the worst case, the wall itself.

Frequently asked questions

What is a sanctioned building plan?

A sanctioned building plan is the drawing the municipal body approves before construction, fixing the number of floors, the floor area ratio, setbacks, height and parking. It is the legal blueprint the structure must follow. Any construction that departs from it is a deviation, so a buyer should compare the sanctioned plan against what actually stands on the ground.

Are small building plan deviations a problem for buyers?

Small deviations are common and can often be regularised by paying a compounding fee, after which the occupancy certificate can be issued. Larger deviations are the real worry, because beyond the permitted margin a portion of the building can face demolition and the occupancy certificate can be withheld. Confirm the exact deviation and its status before you buy.

How do deviations affect my home loan and taxes?

They can hurt both. A building without an occupancy certificate, often because of unresolved deviations, is harder to finance and can attract higher property tax. So a deviation is not just a paperwork issue, it can raise your ongoing costs and limit your borrowing, which is why buyers should treat it as a pricing and financing question.

How can I check a building's sanctioned plan in Bengaluru?

Ask the builder or seller for the sanctioned plan and the approval number, then verify it against the municipal sanction records, which can be checked online for Bengaluru properties. Compare the approved floors, setbacks and floor area ratio with what is built. Extra floors or reduced setbacks are a deviation that needs explaining before you pay.

Last updated 2026-09-28. PropNewz Team.