Residential building built up area calculation for Contractor's Payments

archdevil

Royal Member
Residential building built up area calculation for Contractor's Payments

Norms for Measurement of Built up Area

1) Basement - Payable Area - 100%

2) Built - up Area of each floor ( excluding , service duct , shaft , ducts, staircase , and refuge area) - Payable Area - 100%

3) Refuge area within the building perimeter - Payable area- 70%

4) Refuge area outside building perimeter ( Cantilever projection which requires staging else 50%) - Payable Area - 100%

5) Electrical duct ( 100% of slab casted only ) - Payable Area - 100%

6) Fire fighting duct ( 100% of slab casted only ) - Payable Area - 100%

7) Plumbing duct ( 100% of slab casted only ) - Payable Area - 100%

8) Lift machine room - Payable area- 100%

9) Staircase - Payable Area - 100%

10) Paving around building 20' if applicable - Payable Area - 0%

11) Lift wells - Payable Area - 50%

12) Decks - Payable area- 50%

13) Flower beds - Payable Area - 50%

14) UG/ OH tank - Payable area- 0%

15) Voids / Cut outs / Chajja/ Elevation features/ canopy - 0%

16) Double height areas ( above 4.5m up to 6.25m) - Payable area- 125%

17) Double height areas ( above 6.25m up to 9.0m) - Payable area- 150%

18) Double height areas ( above 9.0m up to 11.25m) - Payable area- 175 %

19) All areas which have a top and bottom slab but have FTF height lesser than 2.1m - Payable Area - 50%

This may vary according to builders choice
 
Why there is variation in percentage in calculation contractors payable? If I take 100% for all different areas, contractor will quote the rate/sft accordingly.
Variation in percentage creates confusion in contractors mind.
Plz help me on this.
 
kindly read the post in depth which talks about the payable area in residential sector. it also vary from builder to builder it was only an out line. more over if you see the post it doesn't talk about the basic prices of material. when ever the basic prices are not defined variation bound to be happen. in a item rate contract if the quantity varies beyond certain limit variation clause applicable. in government tenders you can see the variation and escalation clauses