Before buying a property, check documents like Sale Deed, Title Deed, Agreement to Sale, RERA Certificate, Approved Plan, Occupancy Certificate, Property Tax Receipt, Encumbrance Certificate, and NOC. When comparing flat vs house or apartment vs house, document checking helps you understand the difference between house and apartment, difference between house and flat, and difference between flat and house for safe property buying. Conclusion Always verify legal papers, ownership, RERA details, and tax records before buying a flat or house in Ahmedabad.