One: RERA registration — verify the number on up-rera.in yourself; never accept a screenshot. Two: the builder's delivered portfolio — walk at least one completed project and talk to residents. Three: possession timeline on RERA vs. the sales pitch — they must match exactly.
Four: carpet-area pricing — compare projects only on carpet-area price per sq. ft. Five: construction-linked payment plans over down-payment discounts. Six: bank approvals — multiple independent lender approvals signal clean project legals. Seven: the occupancy-certificate history of the developer's previous projects.
Eight: who constructs — in-house teams or subcontracted layers? Nine: maintenance economics after handover — corpus, monthly rates, and who runs the estate. Ten: exit liquidity — resale premiums in the developer's delivered projects tell you what the market thinks of the brand.