How to Read an Apartment Floor Plan Before You Buy
A floor plan is the cheapest way to test-drive a home. It is also the easiest document to misread. Two plans can quote the same square footage and still live very differently, depending on where the walls, doors, balcony and storage fall.
This guide shows you how to read an apartment floor plan before you commit. Using one annotated sample plan, it walks through six checks: usable space, circulation, furniture fit, balconies, storage and privacy. It then applies them to two real Blue Ocean two-bedroom layouts. Whether you are comparing completed homes, browsing apartments for sale in Colombo or deciding whether to buy an apartment off the plan, these checks take about ten minutes and can help you avoid costly surprises.
At a Glance: Six Checks for Any Floor Plan
The six checks
- Usable space: separate the rooms you will furnish from walls, halls and balconies.
- Circulation: walk the plan with your finger from the front door to every room.
- Furniture fit: draw your bed, sofa and dining table to scale, with the space around them.
- Balconies: check the clear depth, not just the area.
- Storage: count wardrobes, cupboards and store rooms against your belongings.
- Privacy: look at sightlines from the front door and at walls that rooms share.
The sample plan below is an original illustration drawn for this guide to explain the method. It is not a Blue Ocean unit, and its sizes are indicative.
Before You Start: Scale, Symbols and What the Square Footage Includes
Start with the basics. Look for the scale (for example 1:100) or printed dimensions, and a north arrow if there is one, because the direction of the façade tells you where the sun and breeze will come from. Then learn the symbols, shown in Figure 1: thick lines are walls, a quarter-circle arc is a door and the space it sweeps, and thin double lines are windows.
Figure 1. A sample two-bedroom plan with each space numbered and measured. Metres and square feet are both shown so the plan is easy to compare across different listings.Apartment plans may also label a pantry, a service balcony or utility terrace and, in larger units, a maid's room. Check how each of these is reached, and whether the service areas are separate from the living spaces.
What does the quoted size include?
The headline figure is usually the first thing buyers compare, so find out what it covers. Measurement methods vary by developer and market: the stated floor area may include balconies, wall thickness or a share of common areas. Ask the sales team to confirm, in writing, exactly what the quoted figure includes and whether the finished area can differ from the advertised size.
For a real-world comparison, the two-bedroom layouts at Royal Edge in Colombo 06 range from about 1,055 to 1,195 sq ft, and those at Blue Ocean Waves in Colombo 03 from about 1,125 to 1,190 sq ft, across each project's typical floor plans. The sample plan in this guide quotes 972 sq ft including its balcony, which is why it is a useful size to practise on. One square metre is about 10.76 square feet.
Check 1: Work Out the Usable Space
The sample plan quotes 90.3 m² (972 sq ft). Break that figure down and a different picture appears. The balcony accounts for 79 sq ft, and the walls, the hall and the storage rooms take a further share. The living room, dining area, kitchen and two bedrooms together come to about 658 sq ft, roughly two-thirds of the quoted area.
Figure 2. The same plan coloured by use. Inside the walls, 82.9 m² (893 sq ft) splits into living and kitchen, bedrooms, bathrooms, storage and circulation. The balcony sits on top of that.Use the same method on any plan you are considering:
- Write down the quoted area and note whether it includes the balcony.
- Subtract the balcony and any service areas to see the interior.
- Measure each room's length and width, not just its area. A room of 10 m² can be 3.3 × 3.0 m or 5.0 × 2.0 m, and they are not the same room.
- Add up the living areas and bedrooms, and compare that figure between plans, not the headline number.
Two plans with the same quoted size can offer quite different amounts of usable room, and that difference deserves more attention than a small difference in price per square foot.
Check 2: Trace the Circulation
Circulation is the space you walk through to get from one room to another: halls, lobbies and the paths between furniture. Take a pencil, start at the front door and trace your route to every room, as the orange arrows do in Figure 2.
- Count the doors you pass through. Fewer is usually better, and every bedroom should be reachable without crossing the living room.
- Measure the hall. In the sample plan it is 1.2 m wide and 4.6 m long, about 7% of the inside area. A main walkway of 70 to 90 cm is a common planning target, and 90 cm lets two people pass or one person carry shopping or laundry.
- Check the openings. The doorway from the hall into the living room is only 0.9 m wide. That is fine for people, but think about how a sofa, a mattress or a wardrobe will get through.
- Follow everyday routes. Kitchen to dining table, bedroom to bathroom at night, and front door to kitchen with groceries should all be short and clear.
- Think about door swings. A door that opens onto a walkway or into furniture will annoy you daily. The dashed arcs on the plan show where each door sweeps.
A tidy hall with a clear route can be better value than a larger apartment where space is lost to awkward corridors. A hall is not wasted if it saves you from walking through other rooms.
Check 3: Test the Furniture Fit
Room area is a poor guide to whether a room works. Furniture has fixed sizes, and you need clear space around it. Figure 3 shows Bedroom 2 from the sample plan. At 3.5 × 2.8 m (9.8 m², or 105 sq ft) it looks adequate on paper, yet there is a problem.
Figure 3. Panel A: a queen bed and a hinged-door wardrobe leave only 0.2 m in a room 2.8 m deep. Panel B: a 1.6 m deep balcony suits a pair of chairs but not a dining table.A queen bed is about 2.0 m long including the frame, and a wardrobe is about 0.6 m deep. Together they use 2.6 m of the room's 2.8 m depth, leaving about 20 cm, so most of the hinged wardrobe doors cannot open. The room's total area never revealed this. Its depth did.
These widely used planning rules of thumb help you test any room:
| Item | Typical size | Space to allow |
|---|
| Queen bed | Mattress about 1.5 × 1.9 m, plus the frame | About 60 cm beside each side you use and about 70 cm at the foot |
|---|
| King bed | Mattress about 1.8 × 1.9 m, plus the frame | The same clearances, so the room needs roughly 30 cm more width |
|---|
| Wardrobe | About 58 to 60 cm deep | Hinged doors: roughly 1.0 to 1.2 m between bed and wardrobe. Sliding doors: about 70 cm |
|---|
| Four-seat dining table | About 1.2 × 0.75 to 0.8 m | About 60 cm of table width per person and 90 to 100 cm behind each chair |
|---|
| Main walkway | Not applicable | 70 to 90 cm of clear floor |
|---|
Do the test with a tape measure and masking tape. Mark the bed, sofa and dining table on the floor of your current home, or on the floor of a show apartment, then walk around them. If a plan comes with dimensions, draw your own furniture onto it at scale before you decide.
Check 4: Judge the Balconies
Balconies are often counted in the quoted area, so make sure they are worth paying for. Depth matters more than length. Panel B in Figure 3 shows a 4.6 m wide balcony that sounds generous but is only 1.6 m deep.
- Measure clear depth. Subtract the railing, planters and any air-conditioner platform. As a rough guide, about 1.5 m of clear depth suits two chairs and a small table, and about 2 m suits a four-seat table.
- Decide what it is for. Morning coffee, drying laundry, plants and a dining table need different amounts of space.
- Look for a separate service balcony. Many apartment plans include one for laundry and utility, which keeps washing off your main balcony and leaves it for relaxing.
- Check the door. A wide sliding door brings in light and breeze. A narrow one limits both.
- Think about sun and rain. A recessed balcony gives some shelter, while a projecting one is more exposed. Check which way it faces and how it drains.
- Consider privacy. Find out what your balcony faces, and whether neighbours' balconies look directly onto it.
Check 5: Count the Storage
Storage rarely appears in a brochure headline, but it decides how a home feels after the first month. Figure 4 highlights every storage space in the sample plan.
Figure 4. Storage in the sample plan: about 6.9 m of kitchen cabinets, a 62 sq ft utility and store room, a 36 sq ft entry cupboard and two wardrobes.The master bedroom has only 1.8 m of wardrobe wall, which is modest for two people. The store room and entry cupboard add valuable space, but only if you can reach them easily.
Make a short inventory for any plan you are considering:
- Hanging space: measure the wardrobe walls in each bedroom, and ask whether wardrobes are fitted or you must buy them.
- Kitchen: add up the base and wall cabinet runs, and find space for the fridge and appliances.
- Bulky items: decide where suitcases, a vacuum cleaner, an ironing board and a drying rack will live.
- Entrance: look for a place for shoes and bags near the front door.
- Store or utility room: check that it has a door that opens fully, ventilation and room for a washing machine.
Check 6: Protect Your Privacy
Privacy has three layers: what people can see, what they can hear, and what lies outside your windows. A plan can show the first two, and Figure 5 marks both on the sample plan.
Figure 5. Privacy and noise in the sample plan. Red and orange mark concerns, and green marks good decisions.- Stand at the front door. Draw a line from the entry into the home. What can a visitor see when the door opens: a bedroom, a bathroom, a messy kitchen? In the sample plan the bathroom door is about 1.2 m from the front door.
- Find the shared walls. Walls between a living room and a bedroom, between two bedrooms, or between a bathroom and a bedroom carry sound. The sample plan has all three.
- Look at where the bedroom doors sit. A master door at the far end of the hall, away from the living room, usually feels more private.
- Check the ensuite. It should open from the bedroom, and it should not face the bed from the doorway.
- Visit to check the windows. A plan cannot show what lies outside. On site, check how close the neighbouring buildings are and whether they look into your rooms.
Score Any Plan in Five Minutes
Use this table as a quick scorecard when you compare two plans. A plan does not need to pass every row, but you should know which rows it fails.
| Check | Ask yourself | Green flag | Red flag |
|---|
| Usable space | How much is rooms, and how much is balcony, walls and hall? | Living areas and bedrooms make up most of the quoted area | A large share of the quoted area is balcony or circulation |
|---|
| Circulation | Can I reach every room without crossing another? | A short, 90 cm hall; rooms open off a central space | Long corridors, or bedrooms reached through the living room |
|---|
| Furniture fit | Do my bed, sofa and dining table fit with clearance? | Each room is deep and wide enough for its main furniture | Wardrobe doors or the bed blocking each other |
|---|
| Balconies | How deep is it once railings and planters are subtracted? | About 1.5 m or more of clear depth, plus a service balcony | A long but shallow strip |
|---|
| Storage | Where do bulky and everyday items go? | Fitted wardrobes, kitchen cabinets and a store or entry cupboard | A single small wardrobe wall for two people |
|---|
| Privacy | What can be seen and heard from each room? | Bedroom doors away from the entry; wet rooms away from bedrooms | A bathroom door facing the entry, or bedrooms sharing a wall with the living room |
|---|
On a phone, swipe the table sideways to see every column.
Putting It Into Practice: Two Real Two-Bedroom Plans
To see the six checks on real homes, compare two Blue Ocean two-bedroom layouts of almost exactly the same size: Unit H at Royal Edge in Colombo 06 (1,105 sq ft) and Unit D at Blue Ocean Waves in Colombo 03 (1,125 sq ft). Both have two bedrooms and two bathrooms.
Figure 6. Royal Edge Unit H (left) and Blue Ocean Waves Unit D (right), annotated from the marketing renders. The furniture shown is indicative.A note on method: these observations come from the marketing renders and the typical floor plans, which show the layout but not dimensions. Treat the table as a list of questions for the sales team, not as measurements.
| Check | Royal Edge Unit H | Blue Ocean Waves Unit D |
|---|
| Usable space | Balconies run along the front of the master bedroom, living room and second bedroom, and wrap round one side. Confirm how much of the quoted size is balcony. | Balconies serve the living room and both bedrooms. Confirm how much of the quoted size is balcony. |
|---|
| Circulation | Living, dining and kitchen form one open space, with the bedrooms at opposite ends. There is no hall to lose space to, but you cross the shared space to reach both bedrooms. | Living, dining and kitchen form one open space on one side, and the two bedrooms sit together on the other. Again there is no long corridor, and you cross open space to reach the bedrooms. |
|---|
| Furniture fit | A daybed alcove, a large dining table and king beds are shown. Check the alcove's size before counting it as a guest space. | A large dining table, a sofa with an armchair and king beds are shown. Ask for room dimensions before assuming your furniture fits. |
|---|
| Storage | The plan labels a pantry, and the render shows kitchen cabinets and a laundry area beside the kitchen. Ask where wardrobes and bulky items go. | The plan labels a pantry, and the render shows kitchen cabinets. Ask about wardrobe space in both bedrooms. |
|---|
| Privacy | The bedrooms sit at opposite ends of the living space, so they do not share a wall with each other. | The two bedrooms sit side by side, so ask about the sound insulation of the wall between them. |
|---|
Same size, different living. Unit H keeps the bedrooms apart, which suits adults who value separation. Unit D groups them together, which some households, such as families with young children, may prefer. Neither is better: the right plan depends on who will live there.
Take the plan of the unit you like to the sales team, ask about the points above, and request a dimensioned drawing so that you can run the furniture test properly.
Beyond the Plan: Confirm It on Site and on Paper
A floor plan is a starting point. Once a plan passes your checks, confirm it in two more ways.
On site. Visit a show apartment or the building itself, if you can. Stand in the rooms, check the light and breeze, and test the commute. Our guides on choosing an apartment with good natural light and ventilation and comparing Colombo neighbourhoods cover what to look for.
On paper. Marketing plans are simplified illustrations. Ask your lawyer to compare them with the official plan that shows the unit's position, boundaries and share of common areas, and to review the agreement. Our guide to the true cost of owning an apartment in Colombo covers the costs to expect beyond the price.
Questions to Ask the Sales Team
Bring the plan to the sales office and ask:
- Does the quoted area include the balcony, wall thickness and a share of common areas?
- Can I have a plan with dimensions, including the clear internal size of each room?
- Which walls are structural, and can any partitions be changed?
- Are the wardrobes and kitchen cabinets included, and can I see their layout?
- Where do the air-conditioner outdoor units, the water heater and the washing machine go?
- Which way does each room face, and what is in front of the windows?
- How wide are the lift and the front door, for moving furniture in?
- Can I see the same unit type in a show apartment or on a completed floor?
Frequently Asked Questions
How do I read an apartment floor plan?
Start with the scale and symbols, then trace the route from the front door to every room. Measure each room's length and width, test your furniture at scale, and check the balcony, storage and privacy. Finally, confirm what the quoted area includes.
Does the square footage include the balcony?
It depends on the developer. Some state that the floor area includes balconies and is measured to the centre of shared walls, so always ask what the figure covers. Compare the size of the rooms you will actually use, not only the total.
How much space do I need around a bed?
A common guide is about 60 cm beside each side you use and about 70 cm at the foot. A queen mattress is roughly 1.5 m wide, so a bedroom of about 3 m or more in width works comfortably, and a wardrobe facing the bed needs extra room for its doors.
What is a good size for a two-bedroom apartment?
Two-bedroom apartments vary widely. As real-world examples, the two-bedroom layouts at Royal Edge run from about 1,055 to 1,195 sq ft, while those at Blue Ocean Waves range from about 1,125 to 1,190 sq ft. A well-planned smaller layout can feel larger than a poorly planned bigger one, so check the usable rooms and circulation as well as the total.
Conclusion: Let the Plan Work for You
A good floor plan is not the one with the biggest number on it. It is the one where usable rooms are generous, the routes are clear, your furniture fits, the balcony earns its place, storage is enough and privacy is protected. Run the six checks, compare two plans side by side, and you will see differences that the brochure does not show.
Browse floor plans for our apartments for sale in Colombo, or contact the Blue Ocean team and we will walk you through the plans for any project you are considering.