It's one of the most common moments of quiet disappointment in a new home: the brochure promised 1,400 square feet, the sale deed says the same, and yet the flat feels closer to a thousand. Nothing was hidden and nothing was misrepresented — the number on the brochure was almost certainly the super built-up area, and the gap between that figure and the space you can actually furnish is where the disappointment lives.
Walk through where that difference goes. A share of it sits in the thickness of your own walls, which built-up area accounts for but carpet area does not. A further share is your proportionate slice of the building's shared infrastructure — corridors you walk through for seconds a day, a lobby you pass once each morning, a staircase you may never use if you take the lift. None of that is usable floor space inside your own four walls, but all of it is priced into the rate you paid per square foot.
The frustration is rarely about being overcharged. It's about expectation set by the wrong number. A flat quoted at 1,400 square feet super built-up, with a typical 30% loading, hands over roughly 1,000 square feet of carpet area — and that is the figure that should have shaped how you imagined the space before you ever walked in.
If you're planning furniture, storage, or a renovation, carpet area is the only number worth designing against. Convert whatever figure you were quoted before you commit to a layout — it's a five-second calculation that saves weeks of misjudged floor plans later.