House purchase is a process problem, not a negotiation problem: eight to ten steps, each with a document that decides whether the next step is safe. Most bad purchases fail at a check that was skipped, not at a price that was paid. This page walks the sequence in the order it actually happens, with the failure point each step hides. The arithmetic of whether to buy at all is on our rent-versus-buy page; the tax mechanics of the 1% deduction are on the joint-purchase TDS page.
The process on one page
The eight steps in order, each with its key document and its failure point. Steps 1, 4 and 5 carry the money; steps 2, 3 and 6 carry the risk.
View the numbers as a table
| Step | Key document | The failure point it hides |
|---|---|---|
| 1. Budget & eligibility | Sanction-in-principle; EMI stress test | Under-budgeted entry costs (10-15% on top of price) |
| 2. RERA + title check | RERA registration page; 30-year title chain; encumbrance certificate | Title defects found after payment |
| 3. Agreement to sale | Possession date, delay penalty, milestone payments | Unenforceable dates when delay happens |
| 4. Loan sanction & disbursement | Sanction letter; stage-wise demand letters | Assuming sanction = money; TDS duties per release |
| 5. Sale deed + stamp duty + registration | Stamped, registered deed (within ~4 months of execution) | Wrong stamp-duty base; missed registration window |
| 6. Possession + occupancy certificate | OC before the final instalment | Resale impairment without OC |
| 7. Society transfer | Share certificate, membership, no-dues | Transfer disputes at exit |
| 8. Records: mutation, khata, utilities | Municipal mutation entry | A scramble years later at the next sale |
LTV slabs per RBI's housing-finance master circular (Oct 2026); stamp-duty ranges vary by state — the worked table sits on the rent-vs-buy page.
Step 1: fix the budget before you see a property
Three numbers, not one. The price ceiling from your loan eligibility — RBI caps loan-to-value by loan size (up to 90% for loans up to ₹20 lakh, 80% for ₹20–75 lakh, 75% above), so the down payment is 10–25% of price plus 4.5–8% of transaction costs (stamp duty and registration vary by state — the worked table is on the rent-versus-buy page). The EMI ceiling: lenders typically cap total EMIs around 40–50% of net income (industry convention; each bank computes it differently), but your own comfort matters more — stress the EMI against a job-gap on the EMI calculator. And the entry-cost reserve: stamp duty, registration, brokerage and interiors routinely add 10–15% on top of price, and forgetting this is the classic first-time-buyer failure.
Step 2: verify the property before you pay a token
For under-construction projects, check RERA registration first — the project page should show the registration number, sanctioned plan and promised dates; our real-estate hub carries a manual RERA check and project snapshots for study. Then the paper trail: title deeds for the last 30 years (or at least the chain your lawyer certifies), the encumbrance certificate showing no outstanding mortgages, approved building plan, and for resale, the society's no-dues certificate. A ₹15,000–30,000 lawyer's title opinion is the cheapest insurance in the entire process; skipping it to "save time" is the failure point that later costs lakhs.
Step 3: agreement to sale — the document that carries your leverage
For under-construction property, the builder's agreement is where RERA protections get concrete: the possession date, the delay penalty, the payment schedule tied to construction milestones, and the carpet-area definition. For resale, the agreement to sale fixes the price, the token amount, the window for due diligence and the sale-deed date. Read the possession clause and the default clause twice — this document is what you enforce if anything later goes wrong, and everything later goes wrong more often than the brochure suggests.
Step 4: loan sanction and disbursement
Sanction (the bank's in-principle approval) is not disbursement; the bank re-verifies title, valuation and your income documents before each release. Under-construction disbursement is stage-linked to demand letters from the builder — you pay pre-EMI interest on what has been released, not on the full loan. Two habits worth keeping: get the sanction letter in writing with its validity period, and remember that each disbursement instalment to a resident seller attracts the 1% TDS duty if the property crosses ₹50 lakh — the buyers' form-by-form mechanics are on the TDS page.
Step 5: sale deed, stamp duty and registration
The sale deed is the transfer document; the agreement only promises it. It must be stamped at your state's rate (commonly 4.5–8% with registration extra) and registered — under the Registration Act a document presented more than four months after execution needs a fresh route, so treat the registration window as part of the payment week, not an errand. Online stamp-duty portals and e-registration now exist in most large states; the sub-registrar appointment is still physical, and so is the witness requirement (two witnesses for the buyer and seller sides is the norm).
Step 6: possession, and the certificate that matters
Physical handover is not possession in the sense that matters — the occupancy certificate (OC) is. It certifies the building was built as sanctioned; without it, water and power connections are irregular, resale is impaired, and lenders get nervous. Under RERA, delayed buyers hold statutory exit-or-compensation rights (Section 18 of the Act) — but the cleaner outcome is the OC checked and confirmed before the final instalment. If the builder's promise has already slipped, the RERA forum route exists precisely for that; keep the agreement's dates handy.
Step 7: society transfer and the paperwork nobody redoes
For an apartment, the society (or RWA) transfer is its own mini-process: share certificate endorsement, nominal membership, transfer fees within society rules, and a maintenance deposit. Then the records: mutation of the property in municipal records (so property tax bills carry your name), khata or equivalent in the state's terminology, and utility transfers. None of these affect your right to the flat; all of them affect selling it later without a scramble.
What actually goes wrong
Almost always one of four things: title defects found after payment (Step 2 skipped), delay without enforceable dates (Step 3 signed carelessly), under-budgeted entry costs (Step 1), and the missing occupancy certificate discovered at resale (Step 6). Every one of them is cheap to prevent and expensive to fix — which is the entire argument for treating the process as a checklist rather than an adventure.
Educational content, not financial advice. LTV slabs per RBI's housing-finance master circular and registration/stamp-duty ranges per state IGR portals and two aggregators, all checked 29 October 2026 (sources below); EMI-to-income norms are industry conventions. RERA rights are summarised from the Act — the forum process for a delayed project deserves professional advice.