Builder Buyer Agreement in Chennai: Clauses to Read Carefully Before You Sign (2026)
Buying a flat from a builder in Chennai means signing a builder buyer agreement, the document that decides your rights for the next several years. Many buyers sign it in a hurry because the builder or sales team says it is "standard". It is not always standard, and a clause you skip today can cost you lakhs tomorrow. This guide explains the agreement in plain words and lists the clauses you should read slowly before you sign.
What Is a Builder Buyer Agreement?
A builder buyer agreement is the contract between you and the builder for buying a flat in an under-construction or newly launched project. It sets out the price, payment schedule, possession date, what you are getting, and what happens if either side does not keep its promise.
This is different from the sale deed, which is registered when ownership is finally transferred to you. The agreement comes first and is the paper you will rely on if anything goes wrong during construction.
Why RERA Matters Here
Under the Real Estate (Regulation and Development) Act, a registered project must follow rules about what the agreement can and cannot say. In Tamil Nadu, the Tamil Nadu Real Estate Regulatory Authority, known as TNRERA, oversees this. A builder should not take more than 10 percent of the cost as an advance before signing a registered agreement for sale, and the agreement should follow the format prescribed under the state rules. If the draft you receive looks very different, ask why.
Before anything else, confirm that the project is registered with TNRERA and note the registration number and the promised completion date.
Clauses to Read Carefully
Price and what it includes. Check the base price per square foot, the area on which it is calculated, and whether it is carpet area or super built-up area. Ask for a written list of every extra charge, such as parking, club house, power connection, corpus fund and legal fees. If something is described as "to be decided later", ask for it in writing now.
Payment schedule. Payments should be linked to construction stages, not to dates alone. Make sure each stage in the agreement matches real progress on site before you pay it.
Possession date and delay. The agreement should state a clear possession date. Look for what happens if the builder is late. Under RERA, a builder who delays possession has to pay interest to the buyer for the delay. Be careful with clauses that add a long "grace period" or list many reasons that excuse a delay.
Carpet area and changes to it. The agreement should state the carpet area you are buying. If the final area turns out smaller, there should be a fair refund or price adjustment. Check how much variation is allowed and how it is settled.
Specifications and amenities. Tick off the specifications in the brochure against the agreement: flooring, fittings, lifts, parking, power backup, gym, play area and so on. If it is not written in the agreement, you cannot easily demand it later.
Approved plan and changes. The builder cannot freely change the sanctioned plan or layout in a way that affects you. Look for a clause that requires your consent for major changes.
Cancellation and refund. Read what happens if you cancel, and what happens if the builder cancels or fails to deliver. Watch for heavy deduction clauses that favour only one side.
Defect liability. Under RERA, the builder is responsible for structural defects reported within five years of possession and must fix them without charge. Make sure the agreement does not reduce this protection.
Title and approvals. The agreement should mention the land title, the approvals obtained and the bank or banks that have approved the project for home loans. Cross-check these with the documents the builder shows you.
Maintenance and corpus fund. Ask who will maintain the building at first, what the monthly charge will be, and how the corpus fund will be handled and handed over to the residents' association.
Simple Steps Before You Sign
• Ask for the draft in advance and read every page, including the small print and annexures.
• Compare it with the brochure, the website and any promises made over WhatsApp or in person.
• Have a property lawyer review it. The fee is small compared with the amount you are spending.
• Write down your questions and get the answers in writing, or add them as a clause.
• Never pay extra amounts in cash and always keep receipts.
Common Mistakes to Avoid
• Signing because the sales team says it is a standard format.
• Paying a large booking amount before seeing the agreement.
• Ignoring the delay and cancellation clauses until the project is already late.
• Not checking that the carpet area in the agreement matches what was promised.
• Skipping a lawyer review to save a small fee.
Final Word
The builder buyer agreement is your protection if the project runs late or the flat does not match what you were promised. Take your time, ask for the draft early, check it against the TNRERA details, and get it reviewed before you sign. A careful day spent on the paperwork can save you years of trouble.
If you are shortlisting flats in Chennai and want help comparing projects, checking documents and understanding the paperwork, 4K Realty can guide you. Browse our current listings or get in touch with our team for an honest, no-pressure consultation.