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How to Buy a Flat (Step-by-Step Guide)

  • Author: Shivam Chanana Updated: 19 March 2026
To buy a flat in India, follow these steps: set your budget, get home loan pre-approval, shortlist properties, verify RERA registration, conduct legal due diligence, negotiate price, sign the Sale Agreement, pay stamp duty, and complete property registration at the sub-registrar office.

Buying a flat in India is one of the most significant financial decisions a person makes. Whether you’re a first-time home buyer in Mumbai, a young professional exploring flats in Bengaluru, or an NRI investing in Pune real estate, understanding the complete flat purchase process is essential before you sign any document.

India’s real estate sector—governed by RERA (Real Estate Regulation and Development Act)—has become far more transparent and buyer-friendly since 2016. However, the process still involves multiple stages including home loan approvals, legal title verification, stamp duty payment, and property registration. This comprehensive guide by SquareYards walks you through every step so you can buy your dream home with confidence.

Step-by-Step Guide

  1. Assess Your Budget and Financial Readiness

    Determine your total budget by factoring in the flat cost, stamp duty (4–7% depending on state), registration charges (1%), GST for under-construction properties (5%), and home loan EMI capacity. Use SquareYards’ Home Loan EMI Calculator to estimate monthly outflows.
  2. Get Home Loan Pre-Approval

    Approach banks or NBFCs (HDFC, SBI, ICICI, Axis) for a pre-approved home loan. This clarifies your borrowing capacity and strengthens your negotiating position. Required documents: 6-month bank statements, ITR for 2 years, Aadhaar, PAN, and salary slips.
  3. Shortlist Properties Based on Your Requirements

    Use filters on SquareYards to shortlist flats based on location, BHK configuration, possession status (ready-to-move vs. under-construction), amenities, and proximity to schools, offices, and metro stations.
  4. Verify RERA Registration of the Project

    Before any payment, check that the project is registered under RERA on your state’s RERA portal (e.g., MahaRERA for Maharashtra, RERA Rajasthan). RERA registration ensures the builder’s accountability and project delivery timelines.
  5. Conduct Legal Due Diligence

    Hire a property lawyer to verify the title deed, encumbrance certificate, approved building plan, completion certificate (for ready-to-move), occupancy certificate, and land use clearances (NA order). This step protects you from property fraud.
  6. Negotiate the Price and Terms

    Negotiate the base selling price, payment plan (construction-linked plan for under-construction; full payment for ready-to-move), maintenance deposits, car parking charges, and possession timeline.
  7. Sign the Agreement to Sell (ATS)

    This is a legally binding document that outlines the agreed price, payment schedule, possession date, and penalty clauses. Pay the booking amount (typically 10–20% of property value) and get the ATS registered.
  8. Apply for Home Loan and Get Sanction Letter

    Submit your property documents to the bank for technical and legal verification. Once cleared, the bank issues a Loan Sanction Letter with the sanctioned amount, interest rate (fixed or floating), and EMI schedule.
  9. Pay Stamp Duty and Register the Property

    Pay stamp duty at the appropriate government portal (e.g., GRAS in Maharashtra). Register the Sale Deed at the sub-registrar’s office in the property’s jurisdiction. Carry original identity documents, PAN card, and two witnesses.
  10. Take Possession and Move In

    On the possession date, conduct a final walkthrough, verify all amenities and construction quality, collect the Occupancy Certificate (OC) and Completion Certificate (CC), and take the keys. Apply for society membership and utility connections.

Key Factors / Checklist

  • RERA Registration: Always buy from RERA-registered builders for legal protection
  • Clear Title: Ensure the property has a clear, marketable title free of legal disputes
  • Encumbrance Certificate: Confirms no outstanding loans or dues on the property
  • Stamp Duty & Registration: Mandatory legal taxes; varies by state (Maharashtra: 5–6%, Delhi: 4–6%)
  • Occupancy Certificate (OC): Mandatory for ready-to-move flats; confirms legal habitation
  • Home Loan Eligibility: Typically 80–90% of property value based on income
  • GST: 5% on under-construction flats; nil for ready-to-move with OC
  • Carpet Area vs. Super Built-Up Area: Always negotiate and compare on carpet area basis
  • Builder Track Record: Check past project delivery history and RERA complaint history
  • Society Maintenance: Understand pre-handover and post-handover maintenance charges

Expert Tips For Buying Flat In India 

  • Always compare flats on per sq.ft. carpet area not super built-up area—to make accurate price comparisons.
  • Request an ATS (Agreement to Sell) before making any payment beyond the token amount. Verbal commitments are not legally binding.
  • Under-construction flats offer better pricing, but ready-to-move flats eliminate construction risk and allow for immediate rental income.
  • Check the CIBIL Score (750+) before applying for a home loan to secure competitive interest rates from top lenders.
  • For NRI buyers: ensure the property is in the buyer’s name only, as joint ownership with resident Indians has specific FEMA implications.
  • Hire an independent property lawyer (not the builder’s lawyer) for document verification to avoid conflicts of interest.

Common Mistakes to Avoid While Buying Flats In India 

  • Skipping RERA verification and trusting builder claims blindly.
  • Not calculating the total cost of ownership (stamp duty + registration + GST + maintenance).
  • Ignoring the encumbrance certificate and buying a property with existing bank liens.
  • Signing the Sale Deed without reading all clauses, especially possession delay penalties.
  • Not getting a home inspection done before possession for under-construction properties.
  • Overlooking the Occupancy Certificate (OC)—banks can refuse loans on properties without OC.

Frequently Asked Questions

What documents are required to buy a flat in India?

You need: Aadhaar card, PAN card, proof of address, 6-month bank statements, ITR for 2 years, property title deed, RERA registration certificate, encumbrance certificate, approved building plan, and sale agreement.

What is the stamp duty on flat purchase in India?

Stamp duty varies by state. Maharashtra: 5–6%, Delhi: 4–6%, Karnataka: 3–5%, Tamil Nadu: 7%, UP: 7%. Women buyers get a 1–2% concession in most states.

How long does it take to buy a flat in India?

The entire process takes 45–90 days for ready-to-move flats (including loan processing, due diligence, and registration). For under-construction flats, the purchase process takes 15–30 days, with possession in 1–3 years.

Is RERA registration mandatory for all flats?

RERA registration is mandatory for residential projects with more than 8 units or land area exceeding 500 sq. mt. Always verify RERA registration on your state’s RERA website before booking.

Can I buy a flat without a home loan?

Yes, you can purchase through self-funding. However, a home loan offers tax benefits under Section 80C (principal repayment up to 1.5 lakh) and Section 24(b) (interest deduction up to 2 lakh per annum), making it financially advantageous even if you have the funds.

What is the difference between Agreement to Sell and Sale Deed?

The Agreement to Sell (ATS) is a preliminary contract that outlines the purchase terms. The Sale Deed is the final legal document that transfers ownership and must be registered at the sub-registrar’s office to be legally valid.

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