E-Khata for Apartments and Flats in Bengaluru: UDS, the OC Problem, and the Per-Flat Process

The BBMP e-Khata process for an apartment flat has a different shape from the process for a plot or independent house — different documents, different record linkages, and a different set of problems. A buyer who researches the standard e-Khata checklist and applies for their flat using that checklist will often hit a wall that has nothing to do with their own purchase.

The complications usually sit one level above the individual flat: at the level of the building, the builder's records, and the parent title. Understanding this structure is the first step to navigating it.

How BBMP registers an apartment — the UDS framework

When a builder constructs an apartment on a piece of land, each flat buyer acquires two things: the flat itself (the constructed unit) and an undivided share of the underlying land (UDS). The UDS is proportional — calculated on the ratio of the flat's super built-up area to the total super built-up area of the entire building.

For BBMP property-tax and Khata purposes, each flat is treated as a separate taxable unit. The Khata is issued per flat, not for the building as a whole. The e-Khata for your specific flat will reference your UDS extent and your flat number. It will not cover other flats in the same building. The parent land's records — the original survey number, the DC conversion order, the building plan sanction — sit in the background and are the foundation on which your flat's Khata rests.

What the builder's records must show

Before your individual e-Khata application can proceed cleanly, the building's underlying records must be in order. These are: the parent land's registered title (typically the Joint Development Agreement between the builder and landowner, plus the landowner's own title chain), the DC conversion order where the land was agricultural, the BBMP building plan sanction, and the Occupancy Certificate (OC).

The OC is the document BBMP issues confirming that the building has been constructed as per the sanctioned plan and is fit for occupancy. An apartment without an OC is, in regulatory terms, an unauthorised construction. BBMP has increasingly enforced OC requirements at the e-Khata stage — and the 2025 circular made OC submission mandatory for new e-Khata applications for apartments in buildings where OC ought to have been issued.

The OC problem in Bengaluru's apartment stock

A substantial proportion of apartments built in Bengaluru in the last two decades do not have OCs — civic surveys and media reporting have repeatedly flagged this as a citywide problem. This is not a minor regulatory technicality — buildings without OC are technically unauthorised, utility connections can be disrupted, and BBMP demolition notices, though rarely enforced against occupied residential buildings, are legally possible.

For e-Khata purposes, the effect is that flats in buildings without OC face a block at the application stage. The ARO will either reject the application or raise a query pointing to the missing OC. The flat owner cannot produce what the builder did not obtain.

The practical path in most such cases runs through the builder or the apartment association. If the building is under RERA and the OC has not been obtained, the RERA completion certificate or a letter from the RERA authority explaining the status may be accepted. For older buildings, a partial OC (OC for certain floors or phases) is sometimes available and may be sufficient for the specific flat's application. AROs have in some cases accepted an undertaking from the flat owner combined with a survey-department certificate where full OC is genuinely unavailable.

Society or association approval — what it is and is not

The apartment association does not approve or reject an individual flat owner's e-Khata application. The association has no formal role in the BBMP e-Khata process as a consenting or approving party. It can, however, be useful in two ways: first, as a practical source of the building-level documents (master Khata of the parent land, sanctioned plan, OC if obtained, BBMP property tax assessment records for the building); second, as a coordinating body where a builder is unreachable and the association has taken over maintenance of records.

Where a resale buyer is purchasing a flat in an older building and the original builder is no longer contactable, the apartment association's records are often the only available source for the building-level documents. A well-organised association that has maintained these records is a significant practical advantage.

Property ID mismatches across flats in the same building

The e-Aasthi BBMP system assigns a Property Identification Number (PID) to each taxable unit. For apartments, the PIDs should be consistent with the parent survey number and the flat number. In practice, many apartment buildings in Bengaluru — particularly those built between 2000 and 2015 — have inconsistent PID records in the BBMP system: some flats may have PIDs issued against the old survey number, others against the updated survey number after re-survey, and still others may have no PID at all if they were never entered into the BBMP database.

When BBMP e-Aasthi cannot locate a flat's PID, the e-Khata application cannot be initiated through the portal. The fix is to register the property in the BBMP database — a first-time registration application, separate from a Khata transfer — before the e-Khata application. This is the correct sequence; attempting to skip it causes the application to stall.

Resale flats in older buildings — the compounding problem

Resale flat purchases in buildings constructed before 2015 frequently present a layered problem: the original buyer may never have transferred the Khata from the builder's name into their own name after purchase. When the resale buyer applies for e-Khata, the BBMP system shows the Khata in the builder's name (or the landowner's name under the JDA). The buyer then has to process two steps — Khata transfer from builder to original buyer, and then Khata transfer from original buyer to current resale buyer — before the e-Khata can be issued in the current owner's name.

This problem is common enough that a standard pre-purchase check for resale flats is to ask to see the Khata extract before signing the sale agreement, and confirm whose name it is in. If it is in the builder's name, the seller must either complete the Khata transfer before sale or the agreement must be structured to account for that step.

The e-Aasthi area update — the 2026 mandatory fields

In 2026, the e-Aasthi portal introduced mandatory area-disclosure fields for apartments: the super built-up area, built-up area, carpet area, and common area allocation must be entered separately. Earlier, a single figure sufficed. The change affects both new applications and amendments to existing e-Khata records. Where the sale deed records only a super built-up area, supplementing it with the carpet area and common area breakdown may require the builder's original construction schedule or the completion certificate.