How to calculate the cost of a septic tank? ( Part-2)/ Estimation & costing of a septic tank.

Let us calculate the cost of a brick masonry septic tank as shown below.

In part -1, we have estimated the volume & qty. of items in detail, for your better understanding.

Go through the part-1 article👇

💁 ° Estimation & rate analysis of a septic tank.

Here, we will estimate the septic tank in sheet format as given below.

Sl. No.	Description	Nos.	Length in ft.	Breadth in ft.	Depth in ft.	Qty.	Total Qty. in c ft/sq ft.
1.	Earthwork Excavation	1	11	7.5	6.75	556.88	556.88
2.	M20 grade PCC	1	11	7.5	0.416	34.32	34.32
3.	9" brick masonry  in 1:6 CM.
3a.	Long wall	2	10	0.75	6.0	45	90
3b.	Short wall	2	5	0.75	6.0	22.5	45
	Total volume of 9" brick masonry						135.0
4.	4" brick masonry in 1:5 CM.
4a.	Baffle wall-1	1	5	0.33	4.5	7.425	7.425
4b.	Wall-2	1	5	0.33	6.0	9.90	9.90
	Total volume of 4" brick masonry						17.33
5.	12mm thick Plastering in 1:4CM
5a.	9" long wall	2	10	------	6.0	60	120
5b.	9" short wall	2	5	------	6.0	30	60
5c.	4" baffle  wall-1 (on 2 sides)	2	5	------	4.5	22.5	45
5d.	4" wall-2 (on 2 sides)	2	5	------	6.0	30.0	60
5e.	Floor area.	1	8.5	5.0	-----	42.5	42.5
	Total area of plastering						327.50
6.	RCC slab in M25 grade concrete	1	10	6.5	-----	65	65
7.	Manhole cover & frame of 2ft × 2ft size.						1 no.
8.	Vent. pipe						1 no.
9.	4" dia. inlet & outlet pipe						2 nos.

 

Now, the cost of a septic tank is calculated in table format.

Sl. no.	Item.	Qty.	Rate. in INR.	Unit.	Cost in INR.
1.	Excavation	556.99	11/-	Cu ft.	6,126.89
2.	PCC	34.32	207.15/-	Cu ft.	7,109.39
3.	9" brick masonry.	135	159.52/-	Cu ft.	21,535.20
4.	4" brick masonry.	17.33	174.17/-	Cu ft.	3,018.37
5.	Plastering.	327.5	18.10/-	Sq ft.	5,927.75
6.	RCC slab	65	210/-	Sq ft.	13,650.00
7.	Man hole.	1	1800/-	No	1,800.00
8.	Vent pipe.	1	450/-	No	450.00
9.	Inlet & outlet pipe.	2	350/-	No	700.00
6.	The  cost of septic tank =				60,317.40
7.	Add 12% for contractors profit =				7,238.09
10.	The total cost of septic tank =				67,555.49

 

Note:

All the rates of the different items (above table) are picked from the below-linked articles on this construction website.

Go through the articles👇

💁 ° Manual excavation analysis for the building foundation.

💁 ° What will be the cost of M20 grade concrete?

💁 °  What will be the cost of 9" brick wall masonry?

💁 °  What will be the cost of single (4") brick wall masonry?

💁 ° What will be the cost of plastering in a building?

Thank you for going through these calculation steps❤. Have a good day 😄.

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