ᐅ Costs for Pad Foundations and Carport Drainage

Created on: 13 Oct 2017 21:56
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stefanc84
Hello,

I received a quote from our construction company for the preparation of a carport foundation:
- 12 pad footings, 40x40x80 cm (WxDxH)
- about 1 meter (3 feet) of drainage pipe (sewer/inspection chamber is right next to it)
- removal of the excavated soil is not included
=> €4,050 including tax

It should be noted that the house connections and the slab foundation are being done at the same time, so the structural builder doesn’t have to make a separate trip just for a few holes.

Is it very naive of me to have expected around €1,000?
They only need to excavate a few small holes and pour about 1.5 cubic meters (53 cubic feet) of concrete into the footing holes during the slab pouring, right?

What costs would you consider realistic?

Best regards
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Fightthenew
14 Oct 2017 16:14
A concrete garage measuring 9m by 3m (30 feet by 10 feet) is not much more expensive either.
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HERR_bau
14 Oct 2017 19:45
I have two quotes for my precast concrete garage with the dimensions L/W/H 6.5m (21.3 ft)/3m (9.8 ft)/2.5m (8.2 ft), ranging between 8,000 and 10,000 euros, and I am also estimating about 1,000 euros extra for the pier foundation, just like you.
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Nordlys
14 Oct 2017 22:06
Try 6 by 3 meters (20 by 10 feet). Then a width of about 8 meters (26 feet) with the foundation might be possible. My building consultant explained it to me like this: 6 by 3 meters (20 by 10 feet) means you can load two units onto a single truck and transport them without special permits. This cuts the shipping costs in half compared to larger sizes. I find that dimension quite spacious. You can fit a workbench, five wall shelves, two bicycles, a lawn mower, a grill, a wheelbarrow, a refrigerator, winter tires, and still have enough room to move around comfortably inside. Karsten
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Gartenfreund
15 Oct 2017 08:19
It’s not possible to say what the ground conditions are like at your location. However, the foundations could be constructed, for example, like this.

Use an earth auger to drill the holes. Then, if necessary, place thick pipes into the holes and have them extend slightly above ground level. Make sure everything is leveled. After that, just add reinforcement steel and concrete.

This way, you should be able to manage with the $1000 and still have some money left over for a few cases of beer.
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Anoxio
15 Oct 2017 09:36
For our carport, we installed 6 foundations. The work was quite straightforward and manageable, and with instructions, it was easy for me to handle.
First, dig holes using a mini excavator, insert reinforcement, build and align a formwork on top. Pour in concrete, place the post anchors, compact the concrete, ensure the correct height, and that’s it.
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stefanc84
15 Oct 2017 10:37
I personally wouldn’t include any reinforcement. Is it really necessary? And does the foundation really have to be engineered by a structural engineer? I don’t think so, right?
Regarding digging by hand, using an earth auger, etc., I should mention that there is already compacted gravel on the site, so you’d at least need a mini excavator.