A brochure floor plan always looks tidy. Clean lines, neat furniture icons, plenty of white space. Living in the home is a different test. Many first-time buyers spot a layout problem only after moving in, when the sofa will not fit or the dining area needs a light on at noon. The good news is that most of these problems can be seen on paper, if you know where to look and take twenty minutes with a pencil.
Why the floor plan deserves more time than the brochure
For most families, a 3 BHK is a twenty-year decision. You may change the curtains and the paint many times. You will almost never change the walls. The price per square foot gets the attention, but the plan decides how well each of those square feet works for you every day.
Start with one number: carpet area
Section 2(k) of the Real Estate (Regulation and Development) Act, 2016 (RERA) defines carpet area as the net usable floor area of the flat. It leaves out the external walls, service shafts and your exclusive balcony or verandah, and it includes the area covered by the internal partition walls. Builders must state it. Use it for every comparison you make.
Super built-up area adds a share of lobbies, staircases, lift wells and sometimes the clubhouse. It is not wrong to quote, but it is not what you live in. Two flats sold at the same super built-up area can hide very different carpet areas.
A worked example (illustrative)
Say two 3 BHKs are both offered at 1,500 sq ft super built-up.
- Flat A has a carpet area of 1,050 sq ft. That is 1,050 ÷ 1,500 = 70% of the quoted figure.
- Flat B has a carpet area of 1,125 sq ft. That is 1,125 ÷ 1,500 = 75%.
Flat B gives you 75 sq ft more to live in. If both cost ₹90 lakh, Flat A works out to ₹90,00,000 ÷ 1,050 ≈ ₹8,571 per sq ft of carpet area, and Flat B to ₹90,00,000 ÷ 1,125 = ₹8,000. Same headline, different value. These numbers are made up to show the sum, not taken from any project.
Six traps to look for on the plan
1. Long corridors
A passage that runs the length of the flat eats space you pay for but cannot furnish. Trace a line from the front door to each bedroom. A corridor 3.5 feet wide and 20 feet long is 70 sq ft, roughly the size of a small study, spent on walking.
2. A dark middle
Some plans put the dining area in the centre with no window at all. You end up switching on lights through the day. Check that the living room, the dining area and every bedroom touch an outside wall. A window onto a narrow internal shaft is not the same as one facing open air.
3. A balcony too narrow to use
A balcony under about four feet deep is hard to sit in, and tricky even for a clothes stand. Ask for the actual depth and width, not just the word "balcony". Remember that balconies are outside carpet area, so check them separately.
4. Bedroom doors facing the living room
When every bedroom opens straight onto the living area, guests can see in and the television carries into every room. A small lobby or a short passage between the living area and the bedrooms helps privacy, especially if parents or in-laws will live with you.
5. A cramped kitchen
Picture the stove, sink and fridge. Two people should be able to work without squeezing past each other. Look for a utility area for the washing machine, a spot for the water purifier, and somewhere sensible for the gas cylinder.
6. Furniture that will not fit
Draw a queen bed (about 5 by 6.5 feet) and a wardrobe (about 2 feet deep) into each bedroom, leaving at least 2 feet to walk around the bed. If there is no wall left for the wardrobe, or the door swings into the bed, the room is smaller than its number suggests.
Step by step: test a plan in twenty minutes
- Ask for a dimensioned plan. You want room sizes in feet or metres, not just a coloured drawing.
- Print it at a known scale. Even a rough print lets you draw on it.
- Add your furniture. Sofa, dining table, beds, wardrobes, a desk if you work from home. Use real sizes from the furniture you own or plan to buy.
- Trace a normal morning. Bedroom to bathroom, bathroom to kitchen, kitchen to front door. Count how often paths cross.
- Mark the windows. Note which way each faces. West-facing rooms get strong afternoon sun.
- Find the wet walls. Bathrooms and kitchens share plumbing. A bathroom wall shared with a bedroom wardrobe can lead to damp if waterproofing fails.
- Check storage. Count the walls where a wardrobe or loft can go. Families collect things fast.
- Compare with one other plan. The same exercise on a second project shows you quickly which layout uses its area better.
Common mistakes first-time buyers make
- Judging by the show flat. Show flats often use smaller-than-usual furniture and no doors on wardrobes. Measure the real thing.
- Comparing on super built-up area. As the example shows, it can hide a 5 to 10 point gap in usable space.
- Ignoring the floor and the unit's position. The same plan on a lower floor next to a tall block can get far less light than one higher up or on a corner.
- Not asking about columns. Structural columns sometimes jut into rooms. Ask for the plan showing them.
- Forgetting the third bedroom's real job. If it will be a study, a guest room or a child's room, it needs a window, a door that does not open onto the living room, and space for a bed or desk.
What RERA protects
Once you have signed the agreement for sale, Section 14 of the RERA Act says the builder cannot make additions or alterations to the sanctioned plans, layout plans and specifications of your flat without your previous written consent, apart from minor changes allowed by the Act. Keep a signed copy of the plan with your agreement. It is the reference point if anything differs at handover.
If you work from home
Many 3 BHK buyers plan to use one bedroom as an office. Check that it has a window for daylight on video calls, a wall for a desk that does not face the door, and a power point where the desk will go. A room that shares a wall with the living room television is hard to work in.
Your floor plan checklist
- Carpet area stated in writing, in the agreement
- A dimensioned plan with each room's size
- Every main room has a window to the outside
- No corridor longer than it needs to be
- A place for the washing machine, purifier and gas cylinder
- A wall for a wardrobe in every bedroom
- A balcony you can actually sit in
- Columns marked, so no surprises inside rooms
- A signed copy of the plan kept with your agreement
New to all this? Our first home guide walks you through every step, from shortlisting to registration.