Gymnasium with panoramic skyline views - L&T The Gateway Sewri (representative image)

The Flat Booking Process Explained: EOI, Allotment Letter and Agreement for Sale

Published: October 7, 2026
Updated: October 28, 2026
5 min read

⚡ Quick Answer

Booking a new flat usually follows five steps: expression of interest (EOI), booking amount, allotment letter, agreement for sale and registration. Under RERA, a developer cannot take more than 10% of the cost as an advance before a written agreement for sale is registered.

  • Read every document before you pay.
  • Pay only by traceable bank transfer or cheque to the developer’s account.
  • Keep copies of every receipt and letter.

Once you have chosen your home, the paperwork begins. Words like EOI, allotment letter and agreement for sale can be confusing, especially for first-time buyers.

This guide walks through each step of booking a new home in Maharashtra in plain English, with what to check at every stage. Exact steps can vary by project, so always confirm with the developer.

The Booking Process at a Glance

StepWhat it isWhat you get
1. Expression of interest (EOI)An early sign that you want a home, often before or at launchEOI receipt; usually a priority, not a specific unit
2. BookingYou choose a unit and pay the booking amountBooking form and payment receipt
3. Allotment letterThe developer confirms your unitAllotment letter with unit, price and payment schedule
4. Agreement for saleThe main legal contractSigned agreement with all terms
5. RegistrationThe agreement is registered after paying stamp dutyRegistered agreement and receipts

Planning to book at L&T The Gateway Sewri? Our project-specific guide on how to book a flat at L&T The Gateway Sewri covers the checks, documents and payment steps for this project.

Step 1: Expression of Interest (EOI)

Some projects invite an EOI before units are formally released. It shows the developer you are interested and may give you priority when units are allotted. Ask whether the EOI amount is refundable, how long it is valid and what happens if you do not get the unit you want.

Step 2: Booking Form and Booking Amount

When you choose a specific unit, you fill a booking or application form and pay a booking amount. Read the form carefully, especially the cancellation terms. Pay only to the developer’s official bank account, never in cash and never to a personal account.

RERA rule: under Section 13 of RERA, a developer cannot accept more than 10% of the cost of the apartment as an advance or application fee without first entering into a written agreement for sale and registering it.

Step 3: The Allotment Letter

  • Unit detailsTower, floor, unit number and RERA carpet area.
  • PriceTotal price and what it includes.
  • Payment scheduleWhen each payment is due. See the 20:80 payment plan for one example.
  • ParkingNumber and type of car parks, if any.
  • CancellationWhat happens if you cancel, and any deduction.

Step 4: The Agreement for Sale

The agreement for sale is the most important document. Under RERA, it should follow the prescribed format and cover the unit, carpet area, price, payment plan, possession date, specifications, defect liability and what happens in case of delay or cancellation. Ask for a draft in advance and, ideally, have a lawyer review it.

Check that the possession date matches the project’s MahaRERA page. Read the possession date explained and how to verify a project on MahaRERA.

Step 5: Stamp Duty and Registration

The agreement for sale is registered at the sub-registrar’s office after stamp duty and registration fees are paid. You, or your representative, sign in person with ID proof. Our guides on documents to buy and register a flat and stamp duty, GST and other charges explain what you need.

After Registration

  1. Loan disbursement. If you take a loan, the bank releases funds as per the plan. See our home loan guide.
  2. Demand letters. Pay each instalment on time against the developer’s demand letters.
  3. Keep records. Store every receipt, letter and the registered agreement safely.
  4. Track progress. Follow updates on the MahaRERA project page.

Mistakes to Avoid During Booking

  • Paying in cashAlways pay by bank transfer or cheque to the developer’s official account and get a receipt.
  • Signing without readingRead the booking form, allotment letter and agreement in full.
  • Not checking the carpet areaMake sure the RERA carpet area in the documents matches your unit. See carpet area explained.
  • Missing the cancellation termsKnow what you lose if you change your mind.
  • Ignoring the possession clauseCheck the date, grace period and delay terms.
  • Losing documentsKeep originals safe and scan copies.

Booking around Diwali or another festival? Read buying a home during the festive season in Mumbai to judge festive offers calmly.

If you are buying from abroad, there are extra steps such as a power of attorney. Read the NRI buying guide.

Frequently Asked Questions

What is an allotment letter?

It is a letter from the developer confirming the unit allotted to you, with its price, carpet area and payment schedule.

How much can a developer take before the agreement for sale?

Under Section 13 of RERA, not more than 10% of the cost of the apartment without a written, registered agreement for sale.

Is an EOI amount refundable?

It depends on the project. Ask for the refund terms in writing before you pay.

Do I need a lawyer for the agreement for sale?

It is not mandatory, but having a lawyer review the draft agreement is a sensible step for most buyers.

When is stamp duty paid?

Stamp duty is paid before the agreement for sale is registered at the sub-registrar’s office.

Can I cancel after the allotment letter?

Usually yes, but cancellation terms and any deduction are set out in the booking form and agreement. Read them before you pay.

Conclusion: Read, Verify, Then Pay

The booking process is simple once you know the steps: EOI, booking, allotment letter, agreement for sale and registration. At each step, read the document, check it against MahaRERA, pay only through traceable banking and keep copies. To understand the booking steps for L&T The Gateway Sewri, enquire now or call +91 80503 63647.

L&T The Gateway, Sewri

MahaRERA No. P51900054969

Get the project details, floor plans and price sheet for 3, 4 and 4.5 BHK residences in Sewri, Mumbai. Our team will call you back.

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MahaRERA Registration No.: P51900054969 | Call +91 80503 63647
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