What is a Builder-Buyer Agreement?

The Builder-Buyer Agreement is the most important document in an under-construction property purchase. It is a formal legal contract registered at the Sub-Registrar's office that governs every aspect of the transaction — from payment schedule and possession date to cancellation terms and penalty clauses.

Before RERA 2016, Builder-Buyer Agreements were heavily skewed in favour of developers. Builders could delay possession indefinitely, change flat specifications without consent, and use vague force majeure clauses to escape liability. RERA fundamentally changed this by mandating a balanced agreement with specific buyer protections.

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RERA Section 13 Mandate: No promoter shall accept any sum exceeding 10% of the cost of the apartment as advance payment or application fees without first entering into a written agreement for sale with the buyer and registering it. This makes the agreement mandatory and registration non-negotiable.

Critical Clauses to Verify

Non-Negotiable Clauses to Check Before Signing
  • Exact possession date — must be a specific calendar date, not "within 36 months"
  • Delay penalty — must be SBI MCLR+2% interest on amounts paid (both ways)
  • Carpet area — must match RERA-registered carpet area for your unit type
  • Payment schedule — linked to construction milestones, not arbitrary dates
  • Cancellation and refund terms — must specify refund timeline (max 45 days under RERA)
  • Specifications — flooring, fixtures, fittings must be listed in writing
  • Force majeure clause — only specific, named events qualify — not vague "acts of God"
  • Dispute resolution — must reference RERA authority, not just arbitration

Red Flag Clauses to Reject

Red Flag ClauseWhy It's DangerousWhat to Demand Instead
Asymmetric penaltyBuilder charges 18% interest on buyer delay but pays only 6% on possession delayEqual penalty rate for both parties — MCLR+2%
Vague possession date"48 months from date of commencement" with no commencement date definedSpecific calendar date e.g. 31 December 2027
Unilateral plan change rightBuilder can alter floor plan, amenities, specifications at sole discretionAny change requires written buyer consent
Blanket force majeureAny "unforeseen circumstance" excuses the builder from delaysOnly named events (earthquake, flood, war) qualify
Arbitration-only disputePrevents you from approaching RERA authority or consumer courtRERA authority must be an available remedy
Super built-up pricingPricing based on super built-up area violates RERAAll pricing on carpet area only

How to Execute the Agreement

1

Review Draft Thoroughly

Ask for the draft agreement before paying more than 10% booking amount. Have an independent real estate lawyer review it — not the builder's lawyer.

2

Negotiate Problem Clauses

This is your strongest negotiating window. Push back on asymmetric penalties, vague dates, and unilateral change rights. Document all negotiations in writing.

3

Cross-Check with RERA Portal

Verify that possession date, carpet area, and project details in the agreement match exactly what the builder registered on the RERA portal.

4

Execute on Stamp Paper and Register

The agreement must be printed on stamp paper of appropriate value and registered at the Sub-Registrar office. Both buyer and builder must be present or represented by a valid Power of Attorney holder.

5

Keep Original Safely

The registered original is your primary legal document. Store it securely — you will need it for home loan disbursements, RERA complaints, and possession.

Agreement for SaleRERAPossession CertificateCarpet AreaSale DeedEscrow AccountStamp DutyOccupancy Certificate

Frequently Asked Questions

A Builder-Buyer Agreement is the primary legal contract between a real estate developer and a home buyer for purchase of an under-construction apartment. Under RERA 2016 Section 13, this agreement is mandatory and must be registered before the builder collects more than 10% of the property value.
No. A Builder-Buyer Agreement is executed during the construction phase and creates a binding obligation to sell. The Sale Deed is executed at possession and actually transfers legal ownership. Both documents must be registered, but the Sale Deed is the final ownership document.
If a builder collects more than 10% of property value without executing a registered agreement, it is a RERA violation. File a complaint with your state RERA authority immediately. The builder can be penalised up to 10% of project cost and ordered to refund your money with interest.
No. Under RERA, the builder cannot make material alterations to sanctioned plans or specifications without the written consent of at least two-thirds of buyers affected. If the builder changes your flat's specifications unilaterally, you can file a RERA complaint and seek compensation.
Registration at the Sub-Registrar office typically takes 1–3 working days once documents are ready. You will need the agreement on stamp paper, both parties' IDs, photographs, and payment of registration fees. Some states now offer online appointment booking.
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