The first time most buyers see a floor plan, they look at the wrong number. The brochure says 1,200 square feet, and the imagination fills it with furniture. The plan itself tells a quieter story. Some of that area sits inside walls, shafts and balconies. Some of it belongs to corridors and stairwells shared with neighbours. What remains for daily life is smaller, and the gap between the two numbers is where disappointment usually starts.
Ask the seller to separate gross area from usable area in writing. Gross area counts the flat plus a share of common spaces. Usable area, sometimes called carpet area in local listings, is the floor you can actually walk on and furnish. A flat that looks generous on paper can feel tight once the wall thickness, the columns jutting into a bedroom and the dead corner behind a door are counted. Builders measure differently, so the only safe comparison is flat to flat, using the same definition, in writing.
Follow the light and the air
Dhaka flats live or die by their windows. On a plan, find the direction of each opening and match it to the sun. A south-facing bedroom catches a breeze and stays usable through a summer afternoon. A bedroom with a single small window facing a narrow gap between buildings will stay dim and damp, however bright the brochure photograph looks. Cross ventilation needs openings on two sides of a room, or at least a window plus a door to a ventilated corridor. A room with one window and a closed door is a box, not a bedroom.
Check the kitchen and bathrooms with the same eye. A kitchen without a window or an exhaust route will push cooking smoke into the living room. A bathroom shown without a window needs a working exhaust shaft, and shafts on plans are easy to draw and hard to fix later. Look for where the washing machine, the water filter and the gas line would actually go, not where the brochure furniture suggests they might.
Place your own furniture, not theirs
Brochure plans come furnished with slim sofas and small beds. Your bed is probably bigger. Measure your largest pieces, a bed, a wardrobe, a dining table, and draw them to scale on a printout. Walk the plan mentally. Can two people pass in the corridor without turning sideways? Does the bedroom door hit the wardrobe when it opens? Does the main door swing into the living room and eat a wall that could hold a shelf? Builders draw doors as arcs. Those arcs are the space you lose every day.
The same test applies outside the flat. Where is the lift relative to the front door, and how far is the walk with grocery bags? Where do visitors park, where does the generator sit, and does the staircase get daylight or stay dark all day? Common areas rarely appear in the sales pitch, yet you pay for them and use them daily.
What no plan can show
A plan cannot show noise from the road below, water pressure on the top floor, or the smell from a restaurant kitchen venting into the light well. It cannot show whether the neighbouring plot will one day rise higher and block your windows. Visit the site at different times of day, stand in the actual flat if the structure is up, and talk to residents of a completed building by the same builder. Ask what surprised them after moving in. Their answers fill the gaps no drawing can.
A floor plan is a tool, not a promise. Read it slowly, measure it against your own furniture and your own day, and get the area definitions in writing before paying a booking amount. The flat you live in is the one drawn between the lines, not the one described beside them.
