Skip to main content

Preliminary estimate: school for 600 students

Short answer

Carpet area 770 m² gives plinth area 1,100 m². Rate Rs 3,400/sq.ft = Rs 36,597.26/m². Civil cost Rs 40,256,986. Adding 1% architecture, 5% water/sanitary, 6% electrification, 5% contingency, 3% supervision yields Rs 48,694,850.27.

Prepare the preliminary estimate for a school building for 600 students. The carpet area required per student is 1.2 m² and for office rooms is 50 sqm. If 20% of built up area of building is occupied by circulation area and 10% by walls. The provision for architectural treatment is 1% of civil cost, for water sanitary works is 5% of civil works and 6% of civil cost for electrification. If prevailing plinth area rate in the area is Rs 3400/sq. ft. Assume other data if necessary.

Carpet and plinth area

Carpet area of classes = 600 x 1.2 = 720 m²; add offices 50 m²; total carpet area = 770.00 m².

Plinth area=7701−0.20−0.10=1,100.00 m2\text{Plinth area} = \frac{770}{1 - 0.20 - 0.10} = 1,100.00\ \text{m}^2

Rate conversion

Plinth area rate = Rs 3,400 per sq. ft; 1 m² = 10.7639 sq. ft, so rate = 3,400 x 10.7639 = Rs 36,597.26 per m². (The rate is used as printed in the question, in sq. ft.)

Estimate

Contingency 5% and supervision/work-charged 3% are assumed, since the question leaves them open.

ItemBasisAmount (Rs)
Building cost (plinth area x rate)1,100.00 m² x 36,597.2640,256,986.00
Architectural treatment1% of civil cost402,569.86
Water supply and sanitary works5% of civil cost2,012,849.30
Electrification6% of civil cost2,415,419.16
Total building cost45,087,824.32
Contingency (assumed)5% of 45,087,8242,254,391.22
Supervision / work-charged (assumed)3% of 45,087,8241,352,634.73
Total estimated cost48,694,850.27

Answer: Plinth area = 1,100.00 m²; total estimated cost = Rs 48,694,850.27 (about Rs 4.87 crore).

✓ Answer checked by Claude Opus 5.5 (high effort)

Related questions

All Estimating and Costing chapter 3 questions →