Estimated Costs for Building and Construction Projects

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

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

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

ESTIMATED COSTS FOR BUILDING PROJECTS 4
Bored excavation for 300mm diameter piers
Total volume is calculated by considering bulking factor of soil (Peterson, 2014).
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 = πr2 = π x 0.152 =
0.07m2
Volume of pier = cross sectional area x depth
= 0.07 x 2.5 = 0.18m3
Volume of 53 piers = 0.18m3 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 = 13.6m3
m3 14 $500 $7,000
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 14m3 of soil material will be excavated for the piers to be bored.

ESTIMATED COSTS FOR BUILDING PROJECTS 5
Bulk excavation for general site preparation (DelPico, 2012)
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
= 262.28m2 x 0.55m = 144.25
Assume that only one side is battered =
18.91m x 1.0m wide x 0.55m = 10.40m3
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
Summary:
A total of 150m3 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 150m3 to be excavated includes the
actual site of the house, working space and battered volume. The subcontractor has to use this
value to determine the most suitable equipment to use for bulk excavation and if the excavated
material will have to be cart away.

ESTIMATED COSTS FOR BUILDING PROJECTS 6
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
m3 23 $1000/m3 $23000
Patio slab = length x width x thickness
= 6.35m x 1.67m x 0.15m = 1.59
m3 2 $500/m3 $1000
Family room = length x width x thickness
= 5.51m x 4.08m x 0.15m = 3.37
m3 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
m3 4 $500/m3 $2000
Pad Footings
Area = 10(1.2 x 0.9) + (0.35 x 2.4)
= 10.80 + 0.84 = 11.64m2
Volume = area x depth
= 11.64 x 0.35 = 4.074
m3 5 $500/m3 $2500
Total m3 38 $30,500
Summary:
A total volume of 38m3 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.