Since builder floors are typically constructed by smaller developers or individual owners rather than large organisations, construction quality can vary more than in branded group housing projects. Check the quality of finishing, the structural design (including provision for future maintenance access), and whether the floor has independent utility connections.
Parking is another practical consideration — confirm exactly how many covered and open parking spaces come with the unit, since this is a common source of disputes later.
Finally, ask about the ownership structure of common areas like the terrace, staircase and any shared walls, so expectations are clear before you move in.