Start by asking which area the plan quotes — carpet, built-up or super built-up — because the same flat is three different numbers. Then trace every door swing, find the north arrow, and check whether any two openings face each other for cross-ventilation.
Key facts
- The same flat is three different numbers. Carpet, built-up and super built-up differ by a third or more. Always ask which one a plan shows.
- Marketing plans often omit beams and columns. Ask for the structural plan if furniture layout matters to you.
- The north arrow predicts comfort better than any amenity list. West-facing living areas take afternoon heat in this climate.
- Cross-ventilation needs two openings facing each other. One window per room is not ventilation, it is light.
- Balcony area is often counted in the quoted size, at full or half weighting. Ask which.
- Furniture is rectangular. Angled and odd-shaped rooms waste more space than the drawing suggests.
- A show flat is not the plan. Show units often omit partition walls and use undersized furniture.
What should I check on any floor plan?
Ten things, in roughly the order that matters. The first one changes the meaning of everything else on the drawing.
| What to check | Where to look | Why it matters |
|---|---|---|
| Which area is this? | Carpet, built-up or super built-up | The same flat is three different numbers. A plan quoting super built-up without saying so overstates the home by a third or more. |
| Wall thickness | Drawn lines have thickness; rooms are measured inside them | Internal dimensions printed on a plan are usually clear internal measurements. Check whether the room size quoted includes the wall. |
| Door swings | The quarter-circle arcs | A door swinging into a room eats usable space and can block a wardrobe or a switch. Trace every arc. |
| Window positions and sizes | Marked on the external walls | A bedroom with one small window on a shared shaft will be dark and still, whatever the plan area says. |
| Shafts, ducts and dead space | Usually hatched or shaded | A duct running through your flat is area you paid for and cannot use. |
| Beam and column positions | Often omitted from marketing plans | Ask for the structural plan. Columns intruding into rooms change furniture layouts entirely. |
| Orientation | The north arrow | In south India, west-facing living areas take afternoon heat. The arrow tells you more about comfort than any amenity. |
| Circulation | The path from the entrance to each room | Walk it mentally. A plan where you cross the living room to reach a bedroom works badly for a family. |
| Plumbing wall alignment | Kitchens and bathrooms stacked or adjacent | Stacked wet areas are cheaper to build and easier to fix. Scattered ones mean longer runs and more failure points. |
| Balcony inclusion | Whether balcony area is counted in the quoted size | It often is, at full or half weighting. Ask, because it changes the usable indoor area significantly. |
What layout problems are hard to live with?
Eight things that look minor on paper and are not.
| Red flag | Why it matters in daily life |
|---|---|
| A bedroom under 100 sq ft | Will not take a double bed plus a wardrobe plus circulation comfortably. |
| A single window per room onto a shaft | Poor light and no cross-ventilation. In this climate that is a daily cost. |
| No cross-ventilation anywhere | Air needs an inlet and an outlet. Check whether any two openings face each other. |
| A kitchen with no external window | Ventilation depends entirely on mechanical extraction that may or may not work. |
| Long internal corridors | Area you pay for and walk through rather than live in. |
| Bathroom door opening into the living or dining area | Unpleasant in daily use and hard to change later. |
| Odd-shaped or angled rooms | Furniture is rectangular. Angled walls waste more space than they look like they will. |
| Wet areas directly above bedrooms in the unit above | The most common source of seepage complaints. |
None of these is necessarily disqualifying — a compact bedroom in an otherwise excellent flat at the right price is a reasonable trade. The point is to notice them while you can still choose a different unit, rather than three months after moving in.
What does a marketing floor plan not show you?
Five things, routinely.
Structure. Beams and columns are often left off marketing plans. A column projecting into a bedroom corner can make a wardrobe wall unusable. Ask for the structural drawing.
Ceiling height. A plan is a horizontal slice; it tells you nothing about the vertical. Ask for the finished floor-to-ceiling height, and ask again for the height under beams, which is lower and is where you will actually stand.
What is outside the window. A plan shows an opening, not a view. The window may face a blank wall three metres away, the next tower, a generator yard or a service road. This is only discoverable on site.
Services. Where the AC outdoor units go, where the water tank sits, where the electrical DB is, where plumbing is concealed. All of it affects how you can use and alter the home.
Noise. Proximity to the lift shaft, the staircase, the generator, the clubhouse or the main road. A plan makes a flat beside the lift look identical to one at the end of the corridor.
How do I judge a plan against the show flat?
Treat them as two different claims, both of which you verify.
Show flats are built to sell. Common practices include omitting a partition wall that will exist in your unit, using furniture that is smaller than standard, fitting specification above what your contract provides, and lighting the unit far better than daylight will. None of this is necessarily dishonest; all of it changes your perception.
Three things to do in a show flat, with the plan in your hand:
- Measure one room yourself. A tape measure or a phone measuring app. Compare it against the plan. If they differ, ask why before anything else.
- Count the sockets and switches against the specification sheet, not against the show flat.
- Find the walls that are not there. Walk the plan and the show flat together, room by room, and identify every difference.
If a built unit is available rather than a show flat, always prefer it. A finished, unfurnished unit tells you the truth; a styled show flat tells you the intent.
Does a good layout matter more than square footage?
Often, yes, and this is where buyers systematically misallocate.
Square footage is the number everybody compares, because it is easy and it is on every listing. Layout quality is harder to compare and affects daily life more. A well-planned 1,100 sq ft flat with square rooms, cross-ventilation, short circulation and no wasted corridor commonly lives larger than a poorly planned 1,300 sq ft one.
The trade-off to be deliberate about: you can change finishes, fittings and colours after you move in. You cannot change the plan. Walls in Mivan construction in particular are cast and effectively permanent, which makes the layout you buy the layout you keep.
So when choosing between two units at a similar price, weight layout above area, and weight both above the show-flat styling that is designed to be the thing you remember.
The limit of plan-reading, stated plainly: a good plan does not make a good building. A drawing cannot tell you anything about construction quality, waterproofing, the adequacy of the water supply, how the community is run, or who lives next door — and those determine your experience at least as much as the layout does. The risk in becoming good at reading plans is mistaking the drawing for the home. Use it to shortlist, then go and stand in the actual building.
This guide is general and applies to typical apartment plans. Specific structural and regulatory constraints vary by project and city, figures and conventions differ between developers, and anything that matters financially should be verified against the actual approved plan rather than a marketing drawing.
Questions buyers ask
Answered from this page's own research. Last reviewed 3 November 2026 by the PropIQ World research desk.
What is the first thing to check on a floor plan?
Which area it quotes — carpet, built-up or super built-up. The same flat is three different numbers, differing by a third or more. A 1,200 sq ft super built-up flat may have 750 to 850 sq ft of carpet area, so if you have been imagining 1,200 square feet of home, the plan has misled you before you looked at a single room.
How do I check for cross-ventilation on a plan?
Look for two openings that face each other, so air has an inlet and an outlet. One window per room gives light, not ventilation. In south India's climate the difference shows up every day in comfort and in what you spend running fans and air conditioning.
Why does the north arrow matter?
Because orientation predicts comfort better than any amenity list. In south India a west-facing living area takes direct afternoon heat, which raises indoor temperature and cooling costs for years. Find the arrow on the plan and work out which rooms face which way before you fall in love with the layout.
What do marketing floor plans usually leave out?
Five things: structural beams and columns, ceiling height, what is actually outside each window, services like AC outdoor unit positions and electrical boards, and noise sources such as the lift shaft, generator or main road. A plan makes a flat beside the lift look identical to one at the end of the corridor.
What room size is too small?
As a practical guide, a bedroom under about 100 sq ft will not comfortably take a double bed, a wardrobe and circulation space at the same time. Rather than trusting a number, draw your actual furniture onto the plan to scale — it takes ten minutes and resolves the question definitively.
How reliable is a show flat?
It is built to sell. Common practices include omitting a partition wall that will exist in your unit, using smaller-than-standard furniture, fitting above the contracted specification and lighting the space better than daylight will. Take the plan with you, measure one room yourself, and identify every difference between the two.
Should I prefer a show flat or a finished unit?
A finished, unfurnished unit, always, if one is available. It tells you the truth about dimensions, finishes, light and outlook. A styled show flat tells you the developer's intent. If only a show flat exists, verify it against the written specification sheet line by line.
Is layout more important than square footage?
Often, and buyers systematically underweight it because area is easier to compare. A well-planned 1,100 sq ft flat with square rooms, cross-ventilation and short circulation commonly lives larger than a poorly planned 1,300 sq ft one. You can change finishes after moving in; you cannot change the plan.
Can I change the layout after buying?
Less than you think, and in Mivan construction almost not at all — walls are cast monolithically and cannot be knocked through. Even in conventional construction, structural walls, plumbing positions and electrical runs constrain what is practical. Buy the layout you want rather than planning to alter it.
Is balcony area included in the quoted size?
Often, at full or half weighting depending on the developer and the convention used. It materially changes the usable indoor area you are getting, so ask explicitly whether balconies are included and at what weighting before comparing two flats by their quoted size.