Sanctioned Building Plan Checklist for Bangalore Buyers

What Is a Sanctioned Building Plan and Why Does It Matter?

A sanctioned building plan is the official approval issued by the Bruhat Bengaluru Mahanagara Palike (BBMP), Bangalore Development Authority (BDA), or the relevant local planning authority that permits the construction of a specific structure on a specific site, within defined dimensions, floor area ratios, setbacks, and usage specifications. Every building constructed in Bangalore is legally required to have one before construction begins. The sanctioned plan functions as the legal blueprint of what the authority has permitted to exist on that parcel of land.

The actual building standing on the site must match what was sanctioned in every material respect. If it does not, the differences are classified as deviations or unauthorised construction, and these carry significant legal and practical consequences for anyone who purchases the property. A buyer who completes a transaction without verifying the sanctioned plan inherits all the risks associated with unauthorised construction, including potential demolition notices, inability to regularise the structure, and rejection of home loan applications by banks that conduct their own plan verification before disbursement.

What Can Go Wrong If the Building Does Not Match the Sanctioned Plan?

1. Unauthorised Extra Floors Not in the Approved Plan

One of the most common deviations in Bangalore is the construction of floors beyond what the sanctioned plan permits. A builder may have obtained approval for a ground plus two structure but built ground plus four. The additional floors are entirely unauthorised. BBMP can issue demolition notices for these excess floors, and the buyer who purchased a flat on the unauthorised top floor faces the prospect of losing their investment entirely.

2. Flat Area Larger Than What Was Sanctioned (Encroaching on Setback or Common Area)

Some builders construct flats with areas larger than what was approved by encroaching on mandatory setback spaces or common areas such as corridors, staircases, or parking zones. This reduces the legally permissible common area for all residents and may render the building non-compliant with fire safety and ventilation norms. Buyers of such enlarged flats may find their unit areas challenged in future transactions or redevelopment negotiations.

3. Commercial Use Constructed Where Only Residential Was Approved

A sanctioned plan that approves residential use only cannot legally be converted to commercial use without a separate approval or change of land use. Buildings that house commercial establishments on floors approved for residential use face enforcement action, denial of trade licenses, and complications in property transactions. Buyers purchasing what appears to be a commercial space may discover the usage itself is unauthorised.

4. Additional Structures (Parking, Extensions) Built Without Sanction

Builders frequently construct additional structures such as covered parking extensions, servant quarters, terrace rooms, or compound wall modifications that were never part of the sanctioned plan. While these may appear minor, they constitute unauthorised construction and can be subject to demolition or regularisation demands. They also consume space that may have been designated as open area or green cover.

5. The Building Was Constructed Without a Plan At All (No Sanction Exists)

In some cases, particularly in older developments or informal settlements, the building was constructed entirely without obtaining a sanctioned plan. This is the most serious scenario. The structure is presumptively unauthorised from its foundation, and the buyer has no legal basis to claim the construction was legitimate. Regularisation may be impossible, and the structure faces permanent legal vulnerability.

What Are the Legal Consequences of Buying an Unauthorised Structure in Bangalore?

The Bruhat Bengaluru Mahanagara Palike and the Bangalore Development Authority have the statutory power to issue notices to unauthorised structures, demand regularisation fees under applicable schemes, or in serious cases of major deviation, order the demolition of unauthorised portions. These powers are exercised against the current owner of the property, not the builder who constructed the deviation or the previous owner who sold it. A buyer who completes a purchase without plan verification inherits this enforcement risk without recourse against the seller in many cases, particularly if the sale deed contained broad disclaimers.

Home loan institutions in Bangalore have become increasingly cautious about financing properties with known unauthorised structures. Banks conduct their own verification of the sanctioned plan through the builder’s documents or direct BBMP inquiry before approving mortgage applications. If the building has unauthorised floors, significant deviations, or no sanctioned plan at all, the loan is typically refused or restricted to the value of the authorised portion only. This can leave buyers unable to finance their purchase or forced to rely on significantly more expensive unsecured funding.

How to Verify the Approved Building Plan in Bangalore

1. Request the original sanctioned building plan from the builder or seller. The seller should be able to produce a certified copy of the plan approved by the relevant authority. This document will show the approved number of floors, unit configurations, setbacks, and total built-up area. If the seller cannot produce it, this is a serious red flag that requires direct authority verification.
2. Confirm the plan was approved by the correct authority (BBMP, BDA, or planning authority having jurisdiction). Different areas of Bangalore fall under different planning authorities. A plan approved by the wrong authority is not valid. Confirm that the sanctioning authority named on the document actually has jurisdiction over the specific property location.
3. Compare the plan against the actual structure - number of floors, unit sizes, setbacks, common areas. Walk through the building with the sanctioned plan in hand. Count the floors. Measure or verify the flat areas against the plan. Check whether the setbacks from the boundary match the approved dimensions. Any discrepancy is a deviation that requires explanation.
4. Confirm the Commencement Certificate was issued before construction began. The Commencement Certificate is the document that permits construction to start after the plan is sanctioned. If construction began before the Commencement Certificate was issued, the building was constructed illegally from the outset, regardless of whether a plan was later sanctioned.
5. Confirm the Occupancy Certificate was issued after completion, confirming the building matches the plan. The Occupancy Certificate is issued only after the authority inspects the completed building and confirms it matches the sanctioned plan. A building without an Occupancy Certificate is not considered legally fit for occupation, and many utilities and municipal services may be denied.
6. Check whether any post-sanction plan modifications were approved separately. If the builder claims modifications were made after the initial sanction, demand documentary proof that these modifications were separately approved by the authority. Unapproved modifications are deviations, regardless of how minor they appear.

What Is the Difference Between the Sanctioned Plan, Commencement Certificate and Occupancy Certificate?

What Is a Deviation from the Sanctioned Plan?

A deviation occurs when the actual construction on the ground differs in any material respect from what was approved in the sanctioned plan. Common forms of deviation include more floors than sanctioned, smaller setbacks than required, different room configurations or unit sizes, additional structures not contemplated in the plan, or changes in the approved usage from residential to commercial. Deviations are classified by severity. Minor deviations, such as slight variations in non-structural elements, may be compoundable or regularisable under applicable BBMP or BDA schemes upon payment of fees. Major structural deviations, such as additional floors, significant encroachments, or changes in building footprint, are often non-compoundable and expose the structure to demolition action or permanent legal disability. The classification of a specific deviation as minor or major depends on the extent of the variation and the applicable regularisation policy at the time.

How Common Are Unapproved Structures in Bangalore?

Unapproved structures and deviations from sanctioned plans are extremely common in Bangalore, particularly in older residential areas developed before strict enforcement regimes, in pre-RERA era developments where builder accountability was weaker, and in areas where agricultural land was rapidly converted to residential use without proper planning oversight. Builders frequently obtained approval for a ground plus two structure and constructed ground plus four, selling the additional floors at lower prices to buyers who did not verify the plan. The physical appearance of a completed building gives no indication of whether it matches the sanctioned plan. A well-constructed, aesthetically finished building may have significant unauthorised elements. Buyers who relied solely on visual inspection or the builder’s verbal assurances without demanding documentary verification of the sanctioned plan have found themselves owning property in partially or entirely unauthorised structures, facing enforcement action years after purchase.

Building Plan Verification for Apartments vs Independent Houses

What If No Sanctioned Plan Exists or the Seller Cannot Produce It?

The absence of a sanctioned plan is one of the most serious red flags in property verification. It may indicate that the structure was built entirely without approval, that the approval was obtained but never formally documented, or that the builder deliberately avoided the sanctioning process to construct beyond permissible limits. In such cases, the buyer’s first step should be to check directly with the BBMP or BDA records for any plan on file under the property’s survey number or address. A certified copy can sometimes be obtained from the authority even if the seller does not have it. If no plan exists in the authority’s records and cannot be located, the structure must be treated as presumptively unauthorised. The buyer faces significant and potentially unquantifiable risk. Proceeding with purchase without a sanctioned plan requires specialist legal advice and a clear understanding that the property may never achieve full legal regularisation, may be subject to demolition, and will likely be unfinanceable through standard home loan products.

Frequently Asked Questions

What is a sanctioned building plan and why does it matter for buyers?

A sanctioned building plan is the official approval from BBMP, BDA, or the relevant planning authority that permits a specific structure to be built on a specific site with defined specifications. It matters for buyers because the actual building must match this plan. If it does not, the deviations are unauthorised and expose the buyer to demolition risk, loan rejection, and inherited legal liability.

How do I verify if a building in Bangalore has an approved building plan?

Request the original sanctioned plan from the seller or builder, confirm it was approved by the correct authority for that location, compare it against the actual structure for floors, area, and setbacks, and verify that the Commencement Certificate and Occupancy Certificate were properly issued. If the seller cannot produce the plan, check directly with BBMP or BDA records.

What happens if a building has unauthorised floors or deviations?

BBMP or BDA can issue notices demanding regularisation, levy penalties, or order demolition of unauthorised portions. The current owner bears this risk, not the builder who created the deviation. Home loans for such properties are typically refused or restricted. The buyer inherits all enforcement liability.

What is the difference between a sanctioned plan and an Occupancy Certificate?

The sanctioned plan is approved before construction begins and defines what may be built. The Occupancy Certificate is issued after construction is complete and the authority has inspected and confirmed that the building matches the sanctioned plan. A building without an OC is not legally fit for occupation.

Can unauthorised construction in Bangalore be regularised?

Minor deviations may be regularisable under applicable BBMP or BDA regularisation schemes upon payment of prescribed fees. Major structural deviations, such as additional floors or significant encroachments, are often non-compoundable and cannot be regularised. The regularisability depends on the specific deviation and current policy.

How do I get a copy of the sanctioned plan for a property in Bangalore?

The seller or builder should provide a certified copy. If they cannot, you can apply to the BBMP or BDA office that has jurisdiction over the property, providing the survey number and address, to obtain a certified copy from the authority’s records. A property lawyer can assist with this application.

What is a Commencement Certificate and when is it issued?

A Commencement Certificate is issued by BBMP or BDA after the sanctioned plan is approved and before construction begins. It is the legal permission to start construction. Building without a Commencement Certificate is illegal even if a sanctioned plan exists.

Can I get a home loan for a flat with an unauthorised floor?

Most banks and housing finance companies will refuse or restrict home loans for properties with known unauthorised construction. If the unauthorised floor is a major deviation, the loan is typically denied entirely. Some lenders may finance only the authorised portion at a reduced valuation.

Is it safe to buy a flat if the top floor was not in the original approved plan?

No. A top floor not in the sanctioned plan is unauthorised construction. It faces demolition risk, may be non-compoundable, and will likely render the entire property unfinanceable. The buyer inherits full legal and financial exposure for this unauthorised element.

What should I do if the seller says the deviation is minor and can be regularised?

Do not accept the seller’s assessment without independent verification. Engage a specialist property lawyer to review the sanctioned plan, assess the deviation, and confirm whether it is actually regularisable under current BBMP or BDA policy. Many sellers mischaracterise major deviations as minor. Proceed only with written legal confirmation.

Not sure if the building you’re buying matches its approved plan? This check catches what physical inspection cannot

WhatsApp → wa.me/916360266840

Frequently Asked Questions