Estimating the Cost for a
Foundation and Footing
Estimating the Cost for a
Foundation and Footing
•
•
•
•
•
•
The Foundation
The Footing
Calculate and Convert
Vertical Rebar
Horizontal Rebar
Total Cost
The Foundation
Base = 900 ft2 (36 x 25 ft)
Calculate the required
concrete and reinforcing rod
The Foundation
Foundation
8in. thick
8ft high
Volume of foundation = 8in. x 8ft x 122ft (perimeter)
The Footing
Footing
8in. thick
16in. wide
Volume of footing = 8in. x 16in. x 122ft (perimeter)
Calculate and Convert
Calculate
Foundation
Footing
 1ft 
3
8 in. 

8
ft

122
ft

650
.
6
ft

 12 in. 
 1ft 
 1ft 
3
8 in. 

16
in.

122
ft

108
.
4
ft



12
in.
12
in
.




759.0 ft3
Convert
3


1
yd
3
3
(750 ft ) 

28
.
11
yd
3 
 27 ft 
Order 28.5 yards3 for foundation system
Vertical Rebar
A 10 ft long rebar piece
is vertically placed every
3 ft
How many 10 ft pieces
are needed for a 122 ft
perimeter?
122 ft
 40.7
3 ft
41 pieces
Horizontal Rebar
Two rows of horizontal rebar are needed for
the foundation and two for the footing.
6in. of each 10ft section of rebar is
overlapped. Therefore assume a
9.5 ft length. Determine the number
of pieces needed at 9.5ft.
How many 10 ft pieces are needed
for 4 rows with a 122 ft perimeter?
122 ft  4
 51.4
9.5 ft
52 pieces
Total Cost
Concrete Cost
28.5 yards3 x $98/yard3 =
$2,793.00
Rebar Cost
93 pieces x $4.75 =
$441.75
Total Cost
$2793.00 + $441.75 = $3,234.75
Note: This does not include labor, excavation, gravel,
forming material, etc.
Estimating the Cost for a
Foundation and Footing
•
•
•
•
•
•
The Foundation
The Footing
Calculate and Convert
Vertical Rebar
Horizontal Rebar
Total Cost
Image Resources
Microsoft, Inc. (n.d.). Clip art. Retrieved July 20, 2009, from
http://office.microsoft.com/en-us/clipart/default.aspx