Allotment Letter for an Under-Construction Flat Explained

You paid the booking amount for an under-construction flat, and a few days later an email arrives with a PDF titled "Allotment Letter." It has your name, a unit number, a tower, some numbers that don't quite match the brochure you remember, and a payment schedule you're expected to follow. Is this binding? Have you just committed to buy the flat? What happens if you find something wrong in it — can you still walk away, or has the point of no return already passed? For a first-time buyer, the allotment letter sits in an uncomfortable middle ground: it feels official, it comes after real money has changed hands, but it isn't the final agreement, and it definitely isn't the sale deed.

This guide walks through what an allotment letter is, where it fits in the sequence of under-construction (UC) documents, what it should contain, and what to check line by line before you treat it as anything more than what it actually is — an important, but intermediate, step.

Context: Where the Allotment Letter Sits in the UC Document Sequence

Buying an under-construction flat in India typically follows a sequence, though naming conventions vary somewhat between builders:

1. Booking / Expression of Interest (EOI) — a token payment reserving your interest in a project, often before a specific unit is confirmed.
2. Allotment letter — the builder formally allots you a specific unit (tower, floor, unit number) and sets out the price break-up, payment schedule, and key specifications, based on your booking.
3. Builder-buyer agreement / Agreement for Sale — a more detailed, comprehensive contract, often required to be registered under RERA, covering possession timelines, penalties for delay, specifications, and the builder's and buyer's obligations in far greater detail than the allotment letter.
4. Possession letter — issued once the unit is ready for handover, an entirely separate document from the allotment letter (see our related guide on possession letter vs sale deed for that distinction).
5. Sale deed / conveyance — the registered instrument that finally transfers legal title.

The allotment letter, in other words, is the builder's formal confirmation that a specific unit is yours to proceed with — a meaningful commitment on both sides, since it usually follows a real payment and sets the terms that the more detailed builder-buyer agreement will build on — but it is not itself the comprehensive, legally binding sale contract, and it is nowhere near a transfer of ownership.

Step-by-Step: What to Check Line-by-Line in the Allotment Letter

1. Unit identification — confirm the tower/wing, floor, and unit number exactly match what you were shown and what you booked; a mismatch here needs to be resolved before you proceed further.

2. Carpet area, per RERA's defined meaning — check that the area quoted is carpet area as defined under India's Real Estate (Regulation and Development) Act framework, not the older "super built-up area" figure that some brochures still lead with. These can differ substantially, and pricing per square foot is meaningless to compare across projects unless you know which area basis is being used.

3. Price break-up — the base price, any preferential location charges (PLC), floor-rise charges, parking charges, clubhouse/amenity charges, and applicable taxes (GST) should be itemised separately, not bundled into one number you can't audit.

4. Payment schedule — confirm it matches what was verbally discussed at booking, whether it is a construction-linked plan or a time-linked plan, and check for any details on what happens if a payment milestone is delayed or your loan disbursement doesn't align exactly with the schedule.

5. Parking allocation — check whether a specific parking slot or just parking entitlement (with slot allocation later) is being confirmed, and whether it's included in the base price or charged separately.

6. RERA registration number — a registered UC project should carry its state RERA registration number on the allotment letter (or at minimum, be readily traceable to one); note it down to verify independently on the relevant state RERA portal (Maharashtra RERA, Karnataka RERA/RERA Karnataka, Telangana's TS-RERA, and other state portals each publish project-level registration details).

7. Possession timeline reference — even if the detailed timeline sits in the later builder-buyer agreement, check whether the allotment letter references an expected possession date or refers you to the agreement for that detail.

8. Cancellation/refund terms — check whether the allotment letter states what happens (and what, if anything, is forfeited) if you decide not to proceed after this stage, since this is exactly the point where buyers sometimes discover unfavourable terms only after signing.

Data Table: Fields an Allotment Letter Should Contain

Geographic and Demographic Specifics

Booking-to-allotment practices are broadly similar across major metros, but the RERA portal you'll use to verify the project differs by state — Maharashtra RERA (MahaRERA), Karnataka's RERA portal, Telangana's TS-RERA, and other states each maintain their own project registers, and it's worth checking the specific one relevant to where you're buying rather than assuming a single national database. On carpet area specifically, RERA's definition (net usable floor area within the walls, excluding common areas but including usable balconies/verandahs per the specific state rules) is the standard your allotment letter should reference; older marketing materials that still emphasise "super built-up area" figures from before RERA's rollout can make like-for-like comparisons across projects confusing if you don't convert to the same basis. Banks and housing finance companies (HFCs) processing your home loan will typically ask for the allotment letter as one of the documents needed to sanction and process disbursement for a UC purchase, alongside the builder-buyer agreement once executed.

Real-World Scenario: The Carpet-Area Mismatch

A buyer evaluating a UC project in a growing metro corridor was shown a brochure quoting a "1,250 sq. ft." flat during site visits. When the allotment letter arrived, it listed the carpet area as 780 sq. ft. Rather than assuming an error, the buyer asked the builder's sales team to clarify — and learned the brochure figure had been the older super built-up area convention, while the allotment letter correctly used RERA-defined carpet area, a genuinely large numeric gap that is normal between these two measures but easy to misread as a shrinking flat if you don't know to expect it. The lesson here isn't that one figure was fraudulent — it's that comparing a brochure figure to an allotment-letter figure without confirming which area basis each uses is a common, avoidable source of buyer anxiety and occasional real disputes. The buyer's fix was simple: ask directly, get it confirmed in writing, and recompute the effective price per square foot on a consistent carpet-area basis before proceeding.

Allotment Letter vs Builder-Buyer Agreement vs Sale Deed

Pro Tips

• Verify the RERA registration number on the relevant state RERA portal yourself rather than only trusting what's printed on the letter — it takes a few minutes and confirms the project is actually registered as claimed.
• Keep the itemised price break-up from the allotment letter; it's your reference point if later invoices or the builder-buyer agreement quote different figures.
• Ask specifically whether the carpet area quoted is RERA-defined before comparing per-square-foot pricing across projects.
• If the payment schedule is construction-linked, ask what recourse exists if construction stalls between milestones.
• Where public guidance such as NoBroker's overview of legal due diligence practices (2025) discusses independently verifying approvals and registrations via official portals, apply that same principle here — verify RERA status yourself rather than relying solely on the builder's representation.

Common Mistakes to Avoid

• Treating the booking receipt or token-payment acknowledgment as if it were the allotment letter.
• Not checking whether carpet area in the allotment letter matches RERA's definition before comparing it to brochure figures.
• Ignoring the cancellation/refund clause until after a dispute has already arisen.
• Assuming the RERA number printed on the document is accurate without checking the state portal directly.
• Signing the fuller builder-buyer agreement without first reconciling any discrepancies flagged at the allotment-letter stage.

Integration with DrawMagic

Working through an allotment letter line by line is exactly the kind of checklist task DrawMagic's evolving Buyer Intelligence workspace is built to support — a private space to note what the letter should contain, what's missing, and what questions to raise with the builder before you commit further payments. If you're still earlier in deciding where and what to buy, the buyer journey hub frames the bigger picture, and Help is the starting point if you're new to the platform. Because DrawMagic works from public information and your own document review rather than issuing certifications about any builder or project, our Responsible AI page explains how we present facts and sources rather than claims of guaranteed or verified outcomes.

Reviewing your allotment letter with this kind of checklist doesn't cost anything through DrawMagic, but for anything unclear — particularly cancellation terms, RERA registration status, or payment-schedule risk — confirming directly with the builder and, where needed, a licensed legal professional remains essential before you commit further funds.

Key Takeaways

• An allotment letter formally confirms a specific unit is allotted to you, with price break-up and payment schedule, but it is not the comprehensive builder-buyer agreement and not a transfer of ownership.
• Always confirm the carpet area quoted is RERA-defined, not an older super built-up figure, before comparing pricing across projects.
• The price break-up should be itemised — base price, PLC, floor-rise, parking, amenities, taxes — not bundled into a single number.
• Verify the RERA registration number independently on the relevant state RERA portal rather than trusting the letter alone.
• Check the cancellation/refund clause before you sign, since this defines your exit cost at this stage.
• Banks and HFCs typically require the allotment letter as part of home-loan processing for a UC purchase.
• The allotment letter, builder-buyer agreement, possession letter, and sale deed are four distinct documents serving four distinct purposes — don't conflate them.
• DrawMagic's Buyer Intelligence workspace can help you track allotment-letter checkpoints privately before you sign further paperwork.

FAQ

Is the allotment letter legally binding? It generally represents a real commitment on both sides tied to payments already made, but it is not the comprehensive contract — the builder-buyer agreement carries the fuller legal detail, and a licensed professional can advise on the specific enforceability of terms in your allotment letter.

Can I still negotiate changes after receiving the allotment letter? Discrepancies (like a carpet-area mismatch or missing RERA number) are best raised immediately, before signing the builder-buyer agreement, since that later document typically supersedes or formalises the earlier terms.

Does the allotment letter guarantee my possession date? Not necessarily on its own — treat any date referenced in the allotment letter as preliminary and confirm the binding possession timeline (along with any delay-related terms) in the builder-buyer agreement.