Most of what goes wrong in a Hyderabad property purchase goes wrong on paper, not on site. The building gets built. The document that should have been checked in week two surfaces in month nine.
This is the order we ask for things, and why each one matters.
1. Before you pay a booking amount
At this stage you are not buying a flat. You are buying the developer's promise to build one. So the documents that matter are the ones that establish the developer has the right to make that promise.
RERA registration
Under the Real Estate (Regulation and Development) Act, a project of qualifying size must be registered with the state authority before it can be advertised or sold. In Telangana that is TS-RERA. The registration number is the single most useful thing you can be given, because it lets you look the project up yourself — the approved plan, the declared completion date, the promoter details and any complaints filed.
Ask for the number in writing. Then go and check it on the authority's portal rather than taking a screenshot at face value. If a project cannot give you one, that is your answer.
Approved plan and layout approval
The sanctioned plan tells you what was actually permitted — how many floors, what setbacks, how much built-up area. Compare it against the brochure. Brochures are marketing material; the sanctioned plan is the enforceable version. For a plot, the equivalent is the layout approval from the relevant authority.
Title documents and the encumbrance certificate
The chain of title shows how the land came to the developer. The encumbrance certificate shows registered transactions and charges against the property over a period. Together they answer: does the seller own it, and is anything already claimed against it? Have an advocate read these. This is not the place to save money.
2. At booking
You should receive an allotment letter that names the specific unit, the tower, the floor, the carpet and saleable area, and the total consideration broken down. Insist on the breakdown. A single lump figure hides the pieces that are negotiable and the pieces that are not.
The pieces to look for: base rate per square foot, floor rise, preferential location charges, car parking, club or amenity charge, corpus or maintenance deposit, GST, and the registration and stamp duty estimate. Ask which of these escalate and which are fixed.
3. The agreement of sale
Read the clauses on possession date, the grace period after it, and what compensation applies if the date is missed. Read the clause on area variation — what happens if the final measured area differs from the booked area, and in whose favour. Read the exit clause: what you get back, minus what, if you cancel.
If a clause is one-sided, say so before you sign. Afterwards, it is simply the contract.
4. Before registration
Ask for the latest property tax receipt, the no-objection certificates the project needs, and — for a completed building — the occupancy certificate. An occupancy certificate is the authority confirming the building was completed as approved and is fit to occupy. Taking possession of a building without one puts you in a weak position on everything that follows.
Your stamp duty and registration charges are set by the state and payable to the government. Ask for them to be calculated and shown separately from anything payable to the developer or to an agent, so you can see exactly what goes where.
5. After registration
Get the registered document back, apply for mutation so the municipal records show you as the owner, and keep the whole file together. The buyer of your flat, years from now, will ask for exactly the documents you are asking for today.
The short version
Verify the RERA registration yourself. Read the sanctioned plan, not the brochure. Get the cost broken down. Have an advocate read the title and the encumbrance certificate. Do not take possession without an occupancy certificate. None of this is exotic — it is just tedious, and skipping it is what makes it expensive.