CPCCBC4004A Assessment: Detailed Building Project Cost Estimation

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Added on  2023/06/15

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This document presents a detailed cost estimation report for a building project, encompassing various aspects of construction from preliminary tasks to handover. It includes a summary of the bill cost budget, itemized costs for hydraulics, electrical work, kitchen cupboards, insulation, and more. The report also provides detailed calculations for bored excavation, bulk excavation, N25 concrete requirements, SL72 reinforcing mesh, structural steel, roof construction, external openings, plasterboard, and finishes. It incorporates prime cost items and provisional sums as per the CPCCBC4004A assessment requirements, offering a comprehensive overview of the project's financial aspects. The report breaks down each construction phase, providing quantities, rates, and total costs, making it a valuable resource for understanding building project expenses. This document is available on Desklib, a platform offering a wide range of solved assignments and study resources.
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ESTIMATED COSTS FOR BUILDING PROJECTS 1
Estimated Costs for Building and

Construction Projects

Summary

Summary Of Bill
Cost
Budget in

$

1- Preliminary
8320
Bored excavation for 300mm diameter

piers

7000

Bulk excavation for general site

preparation

75000

N25 concrete for the ground slab (beams,

patio slab and pad footings)

30500

SL72 reinforcing mesh for the ground slabs
30000
Lengths of SL12TM for ground slab

construction

9200

Structural steel
89000
Roof construction
1035
External opening
4586.5
Plasterboard
1880
Finishes
3720
Ceramic floor tiles
9320
Plumbing
6310
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ESTIMATED COSTS FOR BUILDING PROJECTS 2
Drainage
10490
Electricity
13950
Subtotal
300311.5
margin
15% 374202.1
3

GST
3% 86066.49
Total
760580.1
2
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ESTIMATED COSTS FOR BUILDING PROJECTS 3
Preliminaries

Item
Particulars Unit Quantity Rate Cost in $
1
1. Hydraulics works
including plumbing,

drainage and roof

plumbing

2.
Electrical work complete
3.
Kitchen cupboards
4.
Insulation to walls and
ceilings

5.
Shower screens
6.
Garage door
7.
Staircase
8.
Landscaping
9.
Floor coverings
Each
1 $20,000.00
$15,000.00

$12,000.00

$ 4,000.00

$ 1,200.00

$ 4,000.00

$ 5,000.00

$12,000.00

$10,000.00

Total
$83,200
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ESTIMATED COSTS FOR BUILDING PROJECTS 4
Bored excavation for 300mm diameter piers

Total volume is calculated by considering bulking factor of soil
(Peterson, 2014).
Summary:

A total of 53
53 Ø300mm and 2.5m deep pier bores shall be excavated. For all the 53 piers, a
total volume of about 14m
3 of soil material will be excavated for the piers to be bored.
Ite

m

Particulars
Unit Quantit
y

Rate
Cost in $
1
Bored excavation volume for 53 Ø300mm
and 2.5m deep piers

Cross sectional area of pier = πr
2 = π x 0.152 =
0.07m
2
Volume of pier = cross sectional area x depth

= 0.07 x 2.5 = 0.18m
3
Volume of 53 piers = 0.18m
3 x 53 = 9.54m3
Assume bulking factor of 1.4 (clay soil), total

volume of soil material to be excavated for

boring of piers = 1.4 x 9.54 = 13.6m
3
m
3 14 $500 $7,000
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ESTIMATED COSTS FOR BUILDING PROJECTS 5
Bulk excavation for general site preparation
(DelPico, 2012)
Summary:

A total of 150m
3 of shall be excavated from the site during general preparation of the site. This
bulk volume includes working space, which extends outside the building towards the boundary

by 1m. The longest side of the building shall also be battered at an angle of 45 degrees and a

width of 1m from the building. The total bulk volume of 150m
3 to be excavated includes the
actual site of the house, working space and battered volume. The subcontractor has to use this

Ite

m

Particulars
Unit Quantit
y

Rate
Cost in $
2
Bulk excavation m3 150 $500 $75,000
Overall bulk area of excavation (plus working

space) = (12.83 + 4.08 + 2.00) x (11.87 +

2.00)

= 18.91 x 13.87 = 262.28

Estimated depths at corners: NE – 0.69m,

NW - 0.55m, SE – 0.50 and SW – 0.45)

Average depth = (0.690 + 0.54 + 0.45 +

0.40)/4 = 0.55m

Volume of bulk excavation = area x depth

= 262.28m
2 x 0.55m = 144.25
Assume that only one side is battered =

18.91m x 1.0m wide x 0.55m = 10.40m
3
Since battering is done at 45 degrees, battered

volume is = 0.5 x 10.40 = 5.20

Total volume of bulk excavation = 144.25 +

5.20 = 149.45
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ESTIMATED COSTS FOR BUILDING PROJECTS 6
value to determine the most suitable equipment to use for bulk excavation and if the excavated

material will have to be cart away.

N25 concrete for the ground slab (beams, patio slab and pad footings)

Thickness of slab = 150mm = 0.15m

Thickness of beam = 450mm = 0.35m

Width of beam = 100mm = 0.1m

Item
Particulars Unit Quantity Rate Cost in $
3
N25 Concrete for ground slab m3
Slab on ground = length x width x slab

thickness

= 12.83m x 11.87m x 0.15m = 22.84

m
3 23 $1000/m3 $23000
Patio slab = length x width x thickness

= 6.35m x 1.67m x 0.15m = 1.59

m
3 2 $500/m3 $1000
Family room = length x width x thickness

= 5.51m x 4.08m x 0.15m = 3.37

m
3 4 $500/m3 $2000
Beams on slab = total length of beams x

width of beam x depth of beam

= 82.82m x 0.1m x 0.45m = 3.73

m
3 4 $500/m3 $2000
Pad Footings

Area = 10(1.2 x 0.9) + (0.35 x 2.4)

= 10.80 + 0.84 = 11.64m
2
Volume = area x depth

= 11.64 x 0.35 = 4.074

m
3 5 $500/m3 $2500
Total
m3 38 $30,500
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ESTIMATED COSTS FOR BUILDING PROJECTS 7
Summary:

A total volume of 38m
3 of N25 concrete shall be required for the whole ground slab, including
beams, patio slab and pad footings but excluding piers. Depending on the mix design

recommended by the engineer, it noes becomes easier to determine the volume of concrete

ingredients (concrete, coarse and fine aggregates and sand) needed for the ground slab.

SL72 reinforcing mesh for the ground slabs

Item
Particulars Unit Quantit
y

Rate
Cost in $
4
Number of SL72 Reinforcing Mesh Sheets
4
Area of ground slab to be reinforced with
mesh (including 50mm cover)

= length x width = 11.98m x 11.02m

= 132.02m
2
Area of family room to be reinforced with

mesh

= length x width = 4.66m x 3.68m = 17.15m
2
Total area of slab to be covered = 132.02 +

17.15 = 149.17m
2
m
2 150 $200/m2 $30,000
Number of sheets = total area of slab/

effective area of SL72

Total area of slab to be reinforced with SL72

mesh = 150m
2
Effective area of SL72 sheet = 5.8m x 2.2m =

12.76m
2
Number of SL reinforcing mesh sheets =

150/12.76 = 11.76

No
12
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ESTIMATED COSTS FOR BUILDING PROJECTS 8
Summary:

The total area of slab that requires to be covered by the SL72 reinforcing mesh is 150m
2. Based
on this area (and putting into consideration the required overlap length and cover at the edges),

the number of 6.0m x 2.4m with 400mm lap SL72 reinforcing sheets required to complete the

slab is 12.

Lengths of SL12TM for ground slab construction

Summary:

Ite

m

Particulars
Unit Quantit
y

Rate
Cost in $
5
Length and number of SL12TM Trench Mesh
Length of trench mesh (including 200mm lap)

= length of one trench x number of trenches

= 13.23m x 3 = 39.69m

= length of one trench x number of trenches

= 12.27m x 3 = 36.81m

= length of one trench x number of trenches

= 4.48m x 2 = 8.96m

= length of one trench x number of trenches

= 5.91m x 1 = 5.91m

Total length of trench mesh = 39.69 + 36.81 +

8.96 + 5.91 = 91.37

m
92 $100 $9,200
Number of SL12TM trench mesh

16 sheets

= Length of trenches/length of trench sheets

= 92/6 = 15.33

No
16
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ESTIMATED COSTS FOR BUILDING PROJECTS 9
The total length of SL12TM trench mesh needed for ground slab (including overlap of 200mm at

each end) is 92m. Since each trench measure comes in 6m lengths, the number of lengths of

SL12TM trench mesh needed is 16. Therefore the contractor will have to supply 16 sheets of 6m

long SL12TM trench mesh.

Structural steel

Ite

m

Particulars
Unit Quantity Rate Cost in $
6
Structural steel tonnes 1.78 $5000
0

$89, 000

B1

Weight = 25.7kg/m x 12.83m = 329.73kg

B2

Weight = 32kg/m x 12.83m = 410.56kg

B3

Weight = 14kg/m x 11.87m = 166.18kg

B4

Weight = 14kg/m x 11.87m = 166.18kg

B6

Weight = 14kg/m x 11.87m = 166.18kg

B5

Weight = 31.6kg/m x 12.83m = 405.43kg

L1

Weight = 14.6kg/m x 4.08m = 59.57kg

L2
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ESTIMATED COSTS FOR BUILDING PROJECTS 10
Summary:

The total weight of structural steel needed for the project is 1.78 tonnes.

Roof construction

Weight = 14.6kg/m x 5.51m = 80.45kg

Total weight = 329.73 + 410.56 + 166.18 +

166.18 + 166.18 + 405.43 + 59.57 + 80.45 =

1784.28kg

Ite

m

Particulars
Unit Quantit
y

Rate
Cost in $
4
Roof construction m3
4 (a)
Rafters and beams
Length = 150 mm

Width = 50 mm

Area = 150 mm * 50 = 7500 mm
2
Total time to be taken = 5 hrs

Total amount on labor = 5 hours * $45 = $225
Hours 5 $45 $225
4 (b)
Strut
100 mm * 50 mm = 5000 mm
2
Total time taken = 5 hours

Total amount on labor = 5 hours * $45 = $225
Hours 5 $45 $225
Purlins

75 mm * 50 mm = 1750 mm
2
Total time taken = 3 hours
Hours 3 $45 $135
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ESTIMATED COSTS FOR BUILDING PROJECTS 11
External opening

Total amount on labor = 3 hours * $45 = $135

Ridges boards

225 mm * 25 mm = 5625 mm
2
Total time taken = 5 hours

Total amount on labor = 5 hours * $45 = $225
Hours 5 $45 $225
Fiscial board

200 m * 25 mm = 5000 mm
2
Total time taken = 5 hours

Total amount on labor = 5 hours * $45 = $225
Hours 5 $45 $225
Rate of Carpenter rate per hour = $45.00

Total cost of construction of roof = $1035

$1035

Ite

m

Particulars
Unit Quantity Rate Cost in $
6
External opening
External opening

Door frames and finishes

Wrot mahogany

Rebated frame

200 mm * 50 mm = 0.2 m * 0.05 m = 0.01 m
2
Number of frame = 3000

Quantity = 0.01 * 3000 = 30 m
2
M
2 30 $45 $1350
Architrave
M2 62.5 $45 $2812.50
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ESTIMATED COSTS FOR BUILDING PROJECTS 12
50 mm * 25 mm = 0.05 m * 0.025 m =

0.00125 m
2
Total number = 1000

Quantity = 0.00125 * 1000 = 1.25 m
2
Total area = 30 + 1.25 = 31.25

Number of doors = 2

Total area = 31. 25 m
2 * 2 = 62.5 m2
Carpenter rate per hour = $45

Windows

Windows size = 1500 mm * 1500 mm =

2250000 mm
2
Number of windows = 4

Total area = 4 * 2250000 mm
2 = 9000000
mm
2 = 9.0 m2
M
2 9 $45 $405
Windows board

125 mm * 25 mm = 3125 mm
2 = 0.003125
m
2
M
2 0.003125 $300 $1.0
Curtain rod

25 mm diameter chrome curtain rod

20 mm diameter curtain

Number of curtain rod = 6

Fixing of curtain rod = 6 hours

Rate of fixing curtain rod per hour = $3

Total cost = 6 hours * $3 = $18

Hours
6 $3 $18
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ESTIMATED COSTS FOR BUILDING PROJECTS 13
Plasterboard

Item
Particulars Unit Quantity Rate Amount
Plasterboard

Area of plasterboard

Assume that the height of plasterboard wall is

2.4m

Area of wall = length of wall x height of wall

A1 = 11.93m x 2.4m = 28.63m
2
A2 = 11.93m x 2.4m = 28.63m
2
A3 = 11.93m x 2.4m = 28.63m
2
A4 = 11.93m x 2.4m = 28.63m
2
A5 = 10.97m x 2.4m = 26.33m
2
A6 = 10.97m x 2.4m = 26.33m
2
m
2 188 $10 $1880
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ESTIMATED COSTS FOR BUILDING PROJECTS 14
Summary:

The total area of wall that will be covered with plasterboard is 245m
2 and a total of 86
plasterboard sheets measuring 1200mm wide and 2400mm long shall be required for the project.

A7 = 10.97m x 2.4m = 26.33m
2
A8 = 10.97m x 2.4m = 26.33m
2
A9 = 3.63m x 2.4m = 8.71m
2
A10 = 3.63m x 2.4m = 8.71m
2
A11 = 4.61m x 2.4m = 11.06m
2
A12 = 4.61m x 2.4m = 11.06m
2
Total area of walls = 4(28.63) + 4(26.33) +

2(8.71) + 2(11.06) = 259.38m
2
Deduct area of doors and windows

Total area of doors = 2(31.25 m
2) = 62.50m2
Area of windows = 4(2.25 m
2) = 9.0m2
Total area of doors and windows = 9.00 +

62.5 = 71.50 m
2
Net measure = 259.38 – 71.5= 187.88 m
2
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ESTIMATED COSTS FOR BUILDING PROJECTS 15
Finishes

66x18mm finished DAR primed pine skirting

Item
Particulars Unit Quantity Rate Amount
66x18mm finished DAR primed pine skirting

Length of skirting

L1 = 11.93m

L2 = 11.93m

L3 = 11.93m

L4 = 11.93m

L5 = 10.97m

L6 = 10.97m

m
114 $20 $2280
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ESTIMATED COSTS FOR BUILDING PROJECTS 16
Summary:

L7 = 10.97m

L8 = 10.97m

L9 = 3.63m

L10 = 3.63m

L11 = 4.61m

L12 = 4.61m

Total length of skirting = 4(11.93) + 4(10.97)

+ 2(3.63) + 2(4.61) = 108.08m

Plus 5% wastage

Total length of skirting (including wastage) =

1.05 x 108.08 = 113.48

Number of skirting lengths

The selected length of 66x18mm finished

DAR primed pine skirting is 2.7m

Number of skirting lengths = length of

skirting/ selected length of skirting

L1: 11.93m/2.7m = 4.42 = 5 sheets

L2: 11.93m/2.7m = 4.42 = 5 sheets

L3: 11.93m/2.7m = 4.42 = 5 sheets

L4: 11.93m/2.7m = 4.42 = 5 sheets

L5: 10.97m/2.7m = 4.06 = 5 sheets

L6: 10.97m/2.7m = 4.06 = 5 sheets

L7: 10.97m/2.7m = 4.06 = 5 sheets

L8: 10.97m/2.7m = 4.06 = 5 sheets

L9: 3.63m/2.7m = 1.34 = 2 sheets

L10: 3.63m/2.7m = 1.34 = 2 sheets

L11: 4.61m/2.7m = 1.71 = 2 sheets

L12: 4.61m/2.7m = 1.71 = 2 sheets

Total sheets = 8(5) + 4(2) = 48

No
48 $30 $1440
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ESTIMATED COSTS FOR BUILDING PROJECTS 17
The total length of skirting is 114m and a total of 48 lengths of 66x18mm finished DAR primed

pine skirting measuring 2.7m long shall be required for the project.

Ceramic floor tiles

Ite

m

Particulars
Unit Quantity Rate Amount
Ceramic floor tiles

Amount of ceramic floor tiles

Floor tiles: 4.59m x 6.11m = 28.04m
2
Plus 10% wastage = 1.10 x 28.04m
2 =
30.85m
2
Wall tiles (under cupboards) = 2(4.59m x

1.8m) + 2(6.11m x 1.8m) = 38.52m
2
m
2 77 $40/m2 $3080
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ESTIMATED COSTS FOR BUILDING PROJECTS 18
Summary:

Plus 10% wastage = 1.10 x 38.52m
2 =
42.37m
2
Total kitchen = 30.85 + 42.37 = 73.22m
2
74m
2
Foyer/stair area = 1.71m x 1.09m = 1.86m
2
Plus 10% wastage = 1.10 x 1.86m
2 = 2.05m2
≈ 3m
2
Total = 74 + 3 = 77 m
2
Number of boxes of floor tiles

Number of boxes of floor tiles = area of floor

tiles/1.2m
2 = (31 + 3)/1.2 = 34m2/1.2m2 = 28
No
28
Number of boxes of wall tiles

Number of wall tiles = area of wall tiles/1.4m
2
= 43m
2/1.4m2 = 31
No
31
Cost of floor tiles

Supply rate provided

Floor tiles = $40.00 per m
2
Amount = 34 m
2 * $40 = $1360
Cost of wall tiles

Supply rate provided

wall tiles = $30.00 per m
2
Amount = 30 m
2 * $40 = $1200
Labour cost of fixing tiles

Labour cost provided

Ceramic tiler = $50.00 per m2

Total area = 74 m
2
Amount = 74 * $50 = $3700

m
2
m
2
m
2
34

40

74

$40

$30

$50

$1340

$1200

$3700
Document Page
ESTIMATED COSTS FOR BUILDING PROJECTS 19
A total area of 115m
2 (including family room, meals room, kitchen and foyer/stair area) shall be
tiled. 60 boxes of floor tiles and 31 boxes of wall tiles shall be required for the project

Plumbing

Plumbing

Item particulars
Unit Quantity Rate Cost
A Plumbing work to Powder,

Laundry, ensuite and Bathroom

areas including the supply and fixing

of all fittings.

B Supply prices from provided

PC schedule

C Labour constants per

Rawlinson 2014

D Toilet suites to areas as noted;
No 4 $800 $3,200
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ESTIMATED COSTS FOR BUILDING PROJECTS 20
Powder - 1

Laundry - 1

Ensuite - 1

Bathroom
– 1
4

Supply (PC)

$600

Labour 2.50 hrs @ $80/hr =

$200

$800 each WC pan and cistern

E Shower bases to areas as

noted;

No
3 $740 $2,200
Powder - 1

Laundry Nil

Ensuite - 1

Bathroom
- 1
3

Supply (PC)

$500

Labour 3.00 hrs @ $80/hr =

$240

$740

Per shower base

F Baths to areas as noted;
No 1 $910 $910
Bathroom -1

Supply (PC)

$750

Labour 2.00 hrs @ $80/hr =

$160

$910

Per bath

Total
$6,310
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ESTIMATED COSTS FOR BUILDING PROJECTS 21
Drainage

Drainage

Item particulars
Unit Quantity Rate Cost
A Drainage work to Powder,

Laundry, ensuite and Bathroom areas

including the supply and fixing of all

fittings.

B Supply prices from provided PC

schedule

C Labour constants per Rawlinson

2014

D Toilet suites to areas as noted;
No 5 $1,200 $6,000
Document Page
ESTIMATED COSTS FOR BUILDING PROJECTS 22
Powder - 2

Laundry - 1

Ensuite - 1

Bathroom
– 1
45

Supply (PC)

$600

Labour 5 hrs @ $120/hr =
$600
$1,200

E Shower bases to areas as noted;
No 4 $800 $3,200
Powder - 2

Laundry Nil

Ensuite - 1

Bathroom
- 1
4

Supply (PC)

$500

Labour 3.00 hrs @ $100/hr =

$300

$800

Per shower base

F Baths to areas as noted;
No 1 $1,290 $1,290
Bathroom -1

Supply (PC)

$750

Labour 3.00 hrs @ $180/hr =

$540

$1,290

Per bath

Total
$10490
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ESTIMATED COSTS FOR BUILDING PROJECTS 23
Electricity

Electricity

Item particulars
Unit Quantity Rate Cost
A Toilet suites to areas as noted;
No 4 $840 $3,360
Powder - 1

Laundry - 1

Ensuite - 1

Bathroom
– 1
4

Supply (PC)

$600

Labour 3 hrs @ $80/hr =
$240
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ESTIMATED COSTS FOR BUILDING PROJECTS 24
$840

B Shower bases to areas as noted;
No 3 $740 $2,200
Powder - 1

Laundry Nil

Ensuite - 1

Bathroom
- 1
3

Supply (PC)

$500

Labour 3.00 hrs @ $80/hr =
$240
$740

Per shower base

C Baths to areas as noted;
No 1 $910 $910
Bathroom -1

Supply (PC)

$750

Labour 2.00 hrs @ $80/hr =

$160

$910

Per bath

D
Hot tub areas as noted; No 2 $740 $1480
Ensuite - 1

Bathroom
- 1
3

Supply (PC)

$500

Labour 3.00 hrs @ $80/hr =
$240
$740

E Tape ware areas as noted;
No 3 $1,160 $3,480
Laundry -1

Ensuite - 1

Bathroom
– 1
3

Supply (PC)

$1000

Labour 2.00 hrs @ $80/hr =
$160
$1,160

Vanity areas as noted;
No 3 $840 $2,520
Document Page
ESTIMATED COSTS FOR BUILDING PROJECTS 25
Laundry -1

Ensuite - 1

Bathroom
- 1
3

Supply (PC)

$600

Labour 3.00 hrs @ $80/hr =
$240
$840

Total
$13950
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