Carpet Area VS Super Builtup Area

Super Builtup Area VS Carper Area Detailing 

1. Definitions

Carpet Area 🏠

• The net usable floor area inside the apartment, measured wall-to-wall.
  
  

• This is the space where you can actually lay a carpet.
  
  

• Includes:
  
  

  • Bedrooms, living/dining room, kitchen
    
    

  • Bathrooms & toilets
    
    

  • Internal partition walls
    
    

  • Balconies (if mentioned in RERA as part of carpet area)
    
    

• Excludes:
  
  

  • External walls
    
    

  • Common areas (stairs, lobby, lift)
    
    

  • Service shafts
    
    

Formula:

Carpet Area=Built−up Area−Thickness of External Walls−Common AreasCarpet\ Area = Built-up\ Area - Thickness\ of\ External\ Walls - Common\ Areas

Super Built-Up Area 🏢

• The carpet area plus proportionate share of common areas.
  
  

• Includes:
  
  

  • Carpet Area
    
    

  • Balconies & terraces
    
    

  • Proportionate share of lobbies, lifts, staircases
    
    

  • Common amenities (clubhouse, corridors, etc.)
    
    

• This is the figure used by developers to quote price in many cases.
  
  

Formula:

Super Built−Up Area=Carpet Area+Common Areas ShareSuper\ Built-Up\ Area = Carpet\ Area + Common\ Areas\ Share

2. Example Calculation

Let’s say:

• Carpet Area: 1,000 sq. ft.
  
  

• Common Area Loading: 30% (typical range 25–35%)
  
  

Then:

Super Built−Up Area=1,000+(1,000×30%)=1,300 sq. ft.Super\ Built-Up\ Area = 1,000 + (1,000 \times 30\%) = 1,300\ \text{sq. ft.}

If rate per sq. ft. is ₹6,000:

• Price (Carpet Area): ₹60,00,000
  
  

• Price (Super Built-Up Area): ₹78,00,000
  
  

3. Why It Matters for Home Buyers

• RERA mandates that sale agreements should clearly mention carpet area, so buyers know their actual usable space.
  
  

• Loading % varies by project type — luxury high-rises may have more common area loading due to more amenities.
  
  

• Always compare projects based on carpet area to know the true space you are getting.
  
  

Items Excluded from Carpet Area

1. External Walls
   
   

   • Thickness of the outer apartment walls is not counted.
     
     

2. Common Areas
   
   

   • Lobby / corridors outside your apartment
     
     

   • Lift and staircase area
     
     

   • Security rooms, guard cabin
     
     

   • Clubhouse, gym, swimming pool
     
     

3. Service & Utility Shafts
   
   

   • Space for vertical ducts, electrical risers, plumbing shafts.
     
     

4. Basements / Parking
   
   

   • Covered or open parking area
     
     

   • Basement floor spaces not part of the flat
     
     

5. Terraces & Roof Spaces
   
   

   • Open terraces and rooftop amenities (unless specifically sold as part of the flat under certain terms).
     
     

6. Other Non-Usable Spaces
   
   

   • Planter beds
     
     

   • Fire escape passages
     
     

   • Meter rooms
     
     

   • Maintenance/service rooms
     
     

💡 Buyer Tip:
Under RERA, builders must clearly state the Carpet Area in the agreement so that buyers can compare projects based on actual usable space, not inflated by common areas.