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Preliminary estimate: two-storied health post

Short answer

Assuming a 400 m² carpet area, plinth area = 400/(1-0.30-0.10) = 666.67 m². Civil cost = 666.67 × 18,000 = Rs 12,000,000; add 1% interior, 8% electrical, 5% other services, then 5% contingency and 3% supervision gives total estimate Rs 14,774,400.

Prepare a preliminary estimate of a two storied health post building to get administrative approval of Ministry. Data are given as below. 30% built up area is occupied by circulation space. [10% built up area is occupied by walls - struck out in the paper] Plinth area rate is Rs. 18000.00/sq.m. Extra cost for interior design 1% of building cost. Extra cost for electrical installation 8% of building cost. Extra cost for other service 5% of building cost. Contingency = 5% Supervision charge = 3%

Assumptions

The question does not give the carpet area (and the wall percentage is struck out in the paper). I take an assumed total carpet area of 400 m² for the two floors (200 m² each), and the wall area as 10% of the built-up area, as in similar questions. The method is the same for any other carpet area CC: plinth area =C/0.60= C/0.60.

Plinth area

Plinth area=4001−0.30−0.10=666.67 m2\text{Plinth area} = \frac{400}{1 - 0.30 - 0.10} = 666.67\ \text{m}^2

Estimate

ItemBasisAmount (Rs)
Building cost (plinth area x rate)666.67 m² x 18,00012,000,000.00
Interior design1% of civil cost120,000.00
Electrical installation8% of civil cost960,000.00
Other services5% of civil cost600,000.00
Total building cost13,680,000.00
Contingency5% of 13,680,000684,000.00
Supervision charge3% of 13,680,000410,400.00
Total estimated cost14,774,400.00

Answer: Plinth area = 666.67 m²; total estimated cost = Rs 14,774,400.00 for the assumed 400 m² carpet area. (Cost = 1.14 x 1.08 x 18,000 x C/0.60 = Rs 36,936 per m² of carpet area.)

✓ Answer checked by Claude Opus 5.5 (high effort)

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