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Preliminary estimate: polytechnic, 800 students

Short answer

Carpet area 960 m² gives plinth area 1,476.92 m². Civil cost at Rs3,500/m² = Rs5,169,230.77. Including 5% water,7% sanitary,12% electrification,3% roads/walls,5% contingency,2.5% work-charged: total Rs7,057,292.31.

Prepare a preliminary estimate of a poly-technique building for student number 800 in order to assess the amount for building based on the following particulars. Carpet area required per student = 1.2 sq.m. Area of corridors, verandah etc. = 20% of plinth area Plinth area rate = Rs. 3500 per square meters. Area of walls = 15% of plinth area. Cost of water supply work = 5% of building cost. Cost of sanitary = 7% of building cost. Cost of electrification = 12% of building cost. Cost of approach road and boundary walls = 3% of building cost. Contingencies and work charge establishments shall be 5% and 2.5% of the total cost respectively.

Plinth area

Carpet area = 800 x 1.2 = 960 m².

Plinth area=9601−0.20−0.15=9600.65=1,476.92 m2\text{Plinth area} = \frac{960}{1 - 0.20 - 0.15} = \frac{960}{0.65} = 1,476.92\ \text{m}^2

Estimate

Extras are percentages of the building cost; contingency and work-charged establishment are on the total cost (building plus extras).

ItemBasisAmount (Rs)
Building cost (plinth area x rate)1,476.92 m² x 3,5005,169,230.77
Water supply work5% of civil cost258,461.54
Sanitary work7% of civil cost361,846.15
Electrification12% of civil cost620,307.69
Approach road and boundary walls3% of civil cost155,076.92
Total building cost6,564,923.08
Contingencies5% of 6,564,923328,246.15
Work-charged establishment2.5% of 6,564,923164,123.08
Total estimated cost7,057,292.31

Answer: Total estimated cost = Rs 7,057,292.31.

✓ Answer checked by Claude Opus 5.5 (high effort)

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