factors affecting the cost variation. presentation structure external development works external...

FACTORS AFFECTING FACTORS AFFECTING

THE THE

COST VARIATIONCOST VARIATION

PRESENTATION STRUCTUREPRESENTATION STRUCTURE • External Development Works External Development Works

– Civil Works Civil Works

– Plumbing WorksPlumbing Works

– Electrical Works Electrical Works

• Main Villa Works Main Villa Works

– Civil Works Civil Works

– Plumbing WorksPlumbing Works

– Electrical WorksElectrical Works

• Cost ImplicationsCost Implications

• Cost Justification for few VillasCost Justification for few Villas

PART- IPART- I

EXTERNAL DEVELOPMENT WORKSEXTERNAL DEVELOPMENT WORKS

EXTERNAL DEVELOPMENT EXTERNAL DEVELOPMENT WORKSWORKSA.A.Civil WorksCivil Works1. Existing ground levels at the time of commencement of villa

construction works were not same for the villas. There was a variation from 400 to 750 mm down from existing road level. Accordingly, the depth of foundation & earth filling varied in the villas

2.2. The constructed area on ground floor varies from minimum 16% to The constructed area on ground floor varies from minimum 16% to maximum 65% of the plot area. Hence, excavated earth available maximum 65% of the plot area. Hence, excavated earth available from foundation / provision basement varies from plot to plot. Also, from foundation / provision basement varies from plot to plot. Also, spread of this earth over the un-built area leads to the variation in spread of this earth over the un-built area leads to the variation in cost.cost.

3. The position of the plot varies from one side open to 3 sides open. Which lead to the variation in the cost of boundary wall, & steel railing etc

4.4. In some plots where the basements are constructed, the area of In some plots where the basements are constructed, the area of basement varies from 10% to 50% of the plot area, resulting the basement varies from 10% to 50% of the plot area, resulting the variation in cost of earth filling.variation in cost of earth filling.

5.5. Cost varies due to construction of spiral staircase (approach to Cost varies due to construction of spiral staircase (approach to garage/ servant roof) wherever it is constructed.garage/ servant roof) wherever it is constructed.

EXTERNAL DEVELOPMENT EXTERNAL DEVELOPMENT WORKSWORKSB.B. Plumbing WorksPlumbing Works 1. Due to variation in positioning of working toilet / kitchen and other

toilets, length of sewer line varies affecting the cost of S.W. pipe, excavation & PCC all around the S.W pipe. .

2. Number of man holes also varies from plot to plot due to the change in length of sewer line as explain in SL. 1, para B above..

EXTERNAL DEVELOPMENT EXTERNAL DEVELOPMENT WORKSWORKSC.C. Electrical WorksElectrical Works 1. Variation in location of earth pits, length of GI/Copper strip from earth

pits to meter board varies. .

2. Copper conductor wire and PVC conduits from meter board to DB varies due to the change in its position. Where as the number of DB also varies depending upon the construction of basement & first floor..

PART- IIPART- II

MAIN VILLA WORKSMAIN VILLA WORKS


A.A.Civil WorksCivil Works 1. By way of permutation and combination there is 150 combinations

and as such no single villa is similar to another. .

2. Though, design selection and the area to be constructed from the selective design were given by the individual owner. But, during the construction of the villas several members made changes in their villas, already approved / given for the construction..

3. Due to provision of basement cost of villa varies due to additional foundation works, construction of RCC wall, water proofing, 115 mm thick brick wall, high plinth level and the provision kept for the extension of roof slab at GF level. Also, due to change in length of provision basement wall, cost of villa varies.

4. Plinth level varies from 600mm to 1200mm level i.e. the level above the road. This is due to provision basement / basement & due to the specific instruction by the individual owner to have the plinth height higher than the normal plinth height i.e. 600mm provided in general villas. Hence, resulting in extra cost of foundation work & filling of earth with in the built-up area etc..


A.A.Civil WorksCivil Works 5. In some of the villas clear height is more than the normal height i.e.

3.20m in general, hence the variation in the cost. .

6. Wherever the double story or triple story has constructed in the villas, (i.e. garage with servant quarter or the first floor on main villas) the cost of terrace work along with parapet wall etc and the cost of foundation is divided & hence the per sft cost is lower than single story..

7. Due to selection of wood works from teak and marandi as per individual choice, cost variation takes place.


B.B. Plumbing WorksPlumbing Works 1. Due to variation in location of PVC water tank at terrace, the length

of GI pipe connecting the water tank varies. .


C.C. Electrical WorksElectrical Works 1. Due to variation in design and number of electrical points cost varies

from plot to plot. Also cost varies due to full and half electrical works, selected by the individual members. .

PART- IIIPART- III

COST IMPLICATIONSCOST IMPLICATIONS

S.S.N.N.

Factors affecting the Factors affecting the variation in the costvariation in the cost

Cost Cost implicationimplication Remarks Remarks

AA External Development WorksExternal Development Works11 Existing ground levels at the time of Existing ground levels at the time of

commencement of villa construction commencement of villa construction works by JRC were not same for all works by JRC were not same for all villas. There was a variation from villas. There was a variation from 400 to 750 mm down from existing 400 to 750 mm down from existing road level. Accordingly, the depth of road level. Accordingly, the depth of foundation & the earth filling vary in foundation & the earth filling vary in the villas.the villas.

Cost varies from Cost varies from Rs. 7/- to 148/- Rs. 7/- to 148/- per sqm per sqm

Cost of villas 7, 29, 33, Cost of villas 7, 29, 33, 43, 87 & 118 are Rs. 43, 87 & 118 are Rs. 3544, 103108, 111253, 3544, 103108, 111253, 92333, 86881 & 16764 92333, 86881 & 16764 respectivelyrespectively

22 The constructed area on ground floor varies from minimum 16% to maximum 65% of the plot area. Hence, excavated earth available from foundation / provision basement varies from plot to plot. Also, spread of this earth on un-built area leads to the variation in cost.

Cost @ Rs. 70/- per sqm (refer item no. 9.23 i.e. providing manure into the earth up to 60 cm depth)

Cost of villas 7, 29, 33, 43, 87 & 118 are & 12397 respectively


S.S.N.N.



33 The position of the plot The position of the plot varies from one side open varies from one side open to 3 sides open. Which to 3 sides open. Which lead to the variation in the lead to the variation in the cost of boundary wall, & cost of boundary wall, & steel railing etcsteel railing etc

aa Extra railing of boundary wall due to road facing of corner plots.

Extra Rs. 960/- per RM

Villa 39 has 52.53m while Villa 87 21.11m hence, costs are Rs. 50429 & 20262 respectively.

bb Extra cost due non shared wall i.e. Independent Vs common wall of corner plots.


Villa 33 & 29 both has independent walls of 2 sides hence, extra cost of Rs. 19745 for both.

cc Extra cost due to more height of boundary wall towards park facing


Villa 33 & 29 both has one wall at park facing. Hence, extra cost of Rs. 11480 for both.

44 Cost varies due to Cost varies due to construction of spiral construction of spiral staircase (approach to staircase (approach to garage/ servant roof) garage/ servant roof) wherever it is constructedwherever it is constructed

Extra cost of Extra cost of Rs. 20837/- for Rs. 20837/- for one flight only. one flight only.

Villa 33 has one flight. However Villa 33 has one flight. However the same vary as per no. of the same vary as per no. of flights.flights.


S.S.N.N.



55 Due to variation in positioning of Due to variation in positioning of working toilet / kitchen and other working toilet / kitchen and other toilets, length of sewer line varies toilets, length of sewer line varies affecting the cost of S.W. pipe, affecting the cost of S.W. pipe, excavation & PCC all around the excavation & PCC all around the S.W pipeS.W pipe

Cost Rs 653/- Cost Rs 653/- per Rm per Rm

Cost of villas 29, 33, Cost of villas 29, 33, 42, 43 & 87 are & 42, 43 & 87 are & 29385 respectively.29385 respectively.

66 Number of man holes also varies Number of man holes also varies from plot to plot due to the change from plot to plot due to the change in length of sewer line as explain in length of sewer line as explain aboveabove

Cost of Rs. Cost of Rs. 4500/- per 4500/- per manholemanhole

Cost of villas 33, 42, 39 Cost of villas 33, 42, 39 & 87 are 39600, 22000, & 87 are 39600, 22000, 40350 & 26400 40350 & 26400 respectively.respectively.

77 Copper conductor wire and PVC Copper conductor wire and PVC conduits from meter board to DB conduits from meter board to DB varies due to the change in its varies due to the change in its position. Where as the number of position. Where as the number of DB also varies depending upon the DB also varies depending upon the construction of basement & first construction of basement & first floorfloor

Cost @ Rs. 455/- Cost @ Rs. 455/- per Rm per Rm

Villa 29, 33 & 87 are Villa 29, 33 & 87 are 20, 35 & 16 Rm 20, 35 & 16 Rm respectively.respectively.

88 Also, variation in location of earth Also, variation in location of earth pits, length of GI/Copper strip from pits, length of GI/Copper strip from earth pits to meter board varies earth pits to meter board varies

Cost Rs 78/- per Cost Rs 78/- per RmRm


S.S.N.N.

Factors affecting the variation in Factors affecting the variation in the costthe cost Cost implicationCost implication Remarks Remarks

B Main Villa1 Due to provision of basement cost of villa

varies due to additional foundation works, construction of RCC wall, water proofing, 115 mm thick brick wall, high plinth level and the provision kept for the extension of roof slab at GF level. Also, due to change in length of provision basement wall, cost of villa varies.

Extra cost varies from Rs. 50/- to Rs. 65/- per sft.

2 Plinth level varies from 600 mm to 1200mm level i.e. the level above the road. This is due to provision basement / basement & due to the specific instruction by the individual owner to have the plinth height higher than the normal plinth height i.e. 600mm provided in general villas. Hence, resulting in extra cost of foundation work & filling of earth with in the built up area etc.

Extra cost varies from Rs. 40 to Rs. 50/- per sft for extra height of plinth i.e. 1200 mm in place of 600 mm

Plinth level of villas those have provision basement is 1200mm in place of 600mm like villa 33 & 29

3 In some of the villas clear height is more than the normal height i.e. 3.20m in general, hence, the variation in the cost.

Extra cost varies from Rs. Rs. 4/-to Rs. 5/- per sft for every 10cm addl. height


S.S.N.N.

Factors affecting the Factors affecting the variation in the costvariation in the cost Cost implicationCost implication Remarks Remarks

4 Wherever the double story or triple story has constructed in the villas, (i.e. garage with servant quarter or the first floor on main villas) the cost of terrace work along with parapet wall etc. and the cost of foundation is divided & hence the per sft cost is lower than single story

Extra cost varies about Rs. 50/- per sft

Villa no. 2 & 87 both are normal plots but cost of foundation & terrace comes to Rs. 245/- and Rs. 193/- per sft respectively.

5 Due to selection of wood works from teak and marandi as per individual choice, cost variation takes place

Extra Cost varies from Rs. 55/- to Rs. 70/- per sft for using teak wood in place of marandi

Many villas have the same like villa no. 29 & Villa no. 33 etc.

6 Due to sloping design of sunshades instead of normal design

Cost of normal & sloping sunshades are Rs. 85/- & Rs. 335/- per sft respectively

All villas have sloping sun shades in place of normal.

7 Due to variation in design and number of electrical points cost varies from plot to plot. Also, cost varies due to full and half electrical works, selected by the individual members.


PART- IVPART- IV

COST JUSTIFICATION FOR FEW VILLASCOST JUSTIFICATION FOR FEW VILLAS

COST JUSTIFICATION FOR FEW COST JUSTIFICATION FOR FEW VILLASVILLAS

S. S. No.No. ParticularsParticulars Amount (Rs.)

A Villa construction Total cost 1,631,029.52 Total covered area 2,261.04 Cost per sft (A) 721.36 Extra cost due to 1 Provision of basement wall (B) 552 Teak wood (C) 553 Plinth height 1200 mm in place of 600mm (D) 40 Per sft Villa Cost after deduction of extra cost of

provision of basement and teak wood (A- (B+C+D))

571

COST JUSTIFICATION FOR FEW COST JUSTIFICATION FOR FEW VILLASVILLASS. S.

No.No. ParticularsParticulars AmountAmount

B EDC Total cost excluding the cost of earth that will cost on

proportionate basis (A)469,403.69

Extra cost due to 1 Independent boundary wall= 30.612 Rm @ Rs. 645/- Rm 19,744.74 2 Extra height of boundary wall due to park facing = 30.612 Rm

@ Rs. 375/- Rm 11,479.50

3 Spiral staircase for approaching to garrage roof 20,837.00 4 Earth filling = 618.07- Avg (360) @ Rs. 180/- 46,452.60 5 Providing and mixing manure in the earth = 257.156- Avg (140)

@ Rs. 116.70/ cum13,672.11

6 Plumbing work: extra length of sewer line including excavation, PCC & haunching etc. = 72.4- Avg (35) @ Rs. 653/- per Rm

24,422.20

7 Plumbing works: extra no of manhole due to extra length of sewer line = (7-5) @ Rs. 4500/-

9,000.00

8 Electrical works: extra length of copper conductor wire = 32.5- Avg (15) @ Rs. 455/- per Rm

7,962.50

Total cost (B) 153,570.65

EDC cost after deduction of extra cost as mentioned above (A-B)

315,833.04


No.No. ParticularsParticulars Amount (Rs.)

A Villa construction Total cost 1,190,510.74

Total covered area 1,501.75

Cost per sft (A) 792.75

Extra cost due to 1 Provision of basement wall (B) 552 Teak wood (C) 553 Plinth height 1200 mm in place of 600mm (D) 40 Per sft Villa Cost after deduction of extra cost of provision of

basement and teak wood (A- (B+C+D))643

COST JUSTIFICATION FOR FEW COST JUSTIFICATION FOR FEW VILLASVILLASS. S. No.No. ParticularsParticulars AmountAmount

B EDC Total cost excluding the cost of earth that will cost on proportionate basis

(A)447,934.40

Extra cost due to

1 Independent boundary wall= 30.612 Rm @ Rs. 645/- Rm 19,744.74

2 Extra height of boundary wall due to park facing = 30.612 Rm @ Rs. 375/- Rm

11,479.50

3 Spiral staircase for approaching to garrage roof - 4 Earth filling = 572.82- Avg (360) @ Rs. 180/- 38,307.60 5 Providing and mixing manure in the earth = 288.409- Avg (140) @ Rs.

116.70/ cum17,319.33


26,146.12


18,000.00


(227.50)

Total cost (B) 130,769.79

EDC cost after deduction of extra cost as mentioned above (A-B) 317,164.61



A Villa construction Total cost 2,663,491.50

Total covered area 4,477.53

Cost per sft (A) 594.86

Extra cost due to 1 Provision of basement wall (B) 02 Teak wood (C) 553 Plinth height 1200 mm in place of 600mm (D) 0 Per sft Villa Cost after deduction of extra cost of

provision of basement and teak wood (A- (B+C+D))540



proportionate basis372,453.1

5 Extra cost due to 1 Independent boundary wall @ Rs. 645/- Rm - 2 Extra height of boundary wall due to park facing @ Rs. 375/- Rm - 3 Spiral staircase for approaching to garrage roof 20,837.00 4 Earth filling = 283.16- Avg (360) @ Rs. 180/- (13,831.20)5 Providing and mixing manure in the earth = 215.063- Avg (140)

@ Rs. 116.70/ cum8,759.85


20,510.73


4,500.00


9,009.00

9 Extra DB & cooper conductor for basement @ Rs. 364/- 12,703.60 Total cost 62,488.98 EDC cost after deduction of extra cost as mentioned above (A-B) 309,964.17



A Villa construction Total cost 988,030.56 Total covered area 1,399.80 Cost per sft (A) 705.84 Extra cost due to 1 Provision of basement wall (B) 552 Teak wood (C) 03 Plinth height 1200 mm in place of 600mm (D) 40 Per sft Villa Cost after deduction of extra cost of

provision of basement and teak wood (A- (B+C+D))

611



proportionate basis

310,003.80

Extra cost due to 1 Independent boundary wall @ Rs. 645/- Rm - 2 Extra height of boundary wall due to park facing @ Rs. 375/- Rm - 3 Spiral staircase for approaching to garrage roof - 4 Earth filling = 283.16- Avg (240) @ Rs. 180/- 5,991.84 5 Providing and mixing manure in the earth = 171.651- Avg (95) @

Rs. 116.70/ cum3,693.67


18,003.21


9,000.00


3,549.00

9 Extra DB & cooper conductor for basement @ Rs. 364/- Total cost 40,237.72 EDC cost after deduction of extra cost as mentioned above (A-B) 269,766.08

• Further details of the costing shown above are Further details of the costing shown above are

available at the Project site office and can be shown available at the Project site office and can be shown

at the convenience of the members. at the convenience of the members.

• However, we will appreciate if all required However, we will appreciate if all required

clarifications can be completed by 15clarifications can be completed by 15thth August 09. August 09.

Thank youThank you

factors affecting the cost variation. presentation structure external development works external...

Documents

villa construction works

main villa works

cost variation slide

external development

cost of earth filling

villas cost justification

construction of basement

area of basement