The efficiency saleable floor area is usually 75 85 of gross floor area higher value for the blocks with bigger apartments and for low rise blocks since the common area of a blocks with a given number of units per floor is approximately same for regardless of apartments size.
Carpet area and saleable area.
This can be worked out by knowing the difference between the super built area and carpet area.
This indicates the proportionate common area space for your home which is calculated by using a 1 25 multiplier to the carpet area working out to roughly 25 30 of saleable area.
Carpet area 1500 100 25 1125 sqft which is a wrong method to calculate carpet area.
Nowadays many builders do not even mention carpet area at first and usually charge on the basis of built up area or super built up area.
Right method for carpet area calculation.
Carpet area is the area covered by a carpet and is often 70 per cent of the built up area.
Remember that loading factor is supposed to be loaded added and not subtracted.
Carpet area is usually around 70 of the built up area.
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Salable area flat area common space number of resident.
Here the carpet area has to be added with a proportionate share of the common area lobby area to arrive at the saleable figure.
Total extra area total lobby area total common area 11000 sqft.
Saleable area includes carpet area plus veranda balcony terrace area which is exclusively meant for the allottee plus the proportionate share of common areas and any other area as agreed between the promoter and allottee in the agreement of sale for which a proportionate cost has been collected from the allottees.
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Focusing on the carpet area will help you understand the usable area in the kitchen bedroom living room etc.
Lobby area 10 floors 400 x 10 4000 sqft.
The built up area is the sum of carpet area and the thickness of walls of the housing unit whereas the super built up area is the total sum of the built up area and the space occupied by common areas.
The saleable built up area of any unit is the actual area including the thickness of the interior exterior walls the area of any balconies or sit outs at eye level and adjoining terraces and a certain percentage of the aggregate area of the common areas of the building in which such unit is situated.
That means carpet area saleable area 1 25 1500 sqft 1 25 1200 sqft.
Developers add a loading factor of 25 or 30 per cent or a multiplying factor of 1 25 or 1 3 to calculate.