How much $ for a basement??

[toyotadriver]

I've built my shop building and am planning the house build. We are planning to build a 33x33 basement for the house. I think the standard is 8 inch thick but feel free to tell me I need more or less. We are going with a poured foundation. I dislike block foundations. We are planning for 9 foot walls.

I realize that prices will vary depending on location but can anyone give me a ballpark estimate of how much it could cost to pour the basement??

Thanks!!!

 

[rsanter]

have you looked at using the ICF (insulated concrete forms) for the basement walls?
they are foam blocks that you stack like legos and then fill with concrete.
they are the form and then they are the insulation

bob

 

[bigbubba]

have you looked at using the ICF (insulated concrete forms) for the basement walls?
they are foam blocks that you stack like legos and then fill with concrete.
they are the form and then they are the insulation

bob

I have heard of these but never saw them used,Is this something you can do yourself?

 

[toyotadriver]

I have heard of ICFs. My main reason for not using them is that they are not very common around here so I would be concerned with the concrete guy not knowing how to use them properly. I want a wall that is completely impervious to water...or as impervious as I can make it. I have already planned the waterproofing for the basement and the drain pipe around the foundation. I'm going to go WAY overboard on the waterproofing.

 

[Milton Shaw]

I have seen several blow outs on the insulated forms, I would not use them unless I was a lot further north than where I am. Any weak spot in the forms could blow out and ruin the wall and make a big mess while you are cleaning it up, you are paying for the waiting concrete pump and trucks and the rest of the wall is setting up.

 

[Silent One]

9' pour is typically 10" thick; BUT, what are your soils like? Crappy soils could result in the need for additional steel reinforcement, beefier footings and drainage on the soil side. You may want to check with a foundation engineer.

As far as cost - hard to say - how many corners? Any 45's? Any window blockouts? Would you like 6 bag cement? What time of year - hot water in the truck during winter or retarder in the summer? All adds to cost.

 

[cowboyjosh]

In my part of the world basements and plans need to be 'ok'd by a Structural Engineer and a soils test completed before submitting to the AHJ. The SE determines the specs for the foundations. Cost vary and its tough to give a "ballpark" estimate.

 

[toyotadriver]

I will be hiring a concrete contractor. I'm assuming that he'll know what the appropriate mix is.

There are no inspections in the area that this house will be built. The soil will be clay type of soil. The foundation will be above grade and I'll be building up the soil around the house to ensure that any rain or water runs away from the house.

The plan is very simple. 33x33 square. I neglected to mention but this will be a walkout basement so there will only be concrete on 3 sides.

 

[rsanter]

I have heard of these but never saw them used,Is this something you can do yourself?

we have one of these buildings at work and a friend of mine built his house with these and did it himself

he did the excavation himself because he had access to the equipment. he had guys come in and set and pour the floor and footing.
he than started stacking the blocks for the sub level and then called the concrete truck and guided the pumping hose himself while friends were using the 'vibrators' to work bubles out of the pour.
to prevent blowouts you will want to pour the concrete in 2-3 foot lifts and let the concrete just start to flash or setup a little before the next lift so that it will support the next lift.
waterproofing will be done the same way as needed for block or cast in place walls.

the great thing about this is that you CAN do it yourself

bob

 

[toyotadriver]

Ok. Does anyone have a ballpark estimate?

I've estimated $30k. That includes the other concrete work for the house garage and the concrete pad joining the house garage and the shop.

I'd like to know how far out my estimate is.

I do understand that in some areas, the price would be much higher. In my area, construction costs are pretty low. I built my current house for $55 per sq foot in 2008 so it's much lower here than elsewhere. I did a lot of the work myself but had a contractor build the structure and finish the exterior.

 

[BAREIN97]

Around here requires 4 ft frost walls, so you would need concrete walls on all 4 sides, which would be a step down on your exposed part. 9 ft walls around here run about $55 a running ft. 4ft about $35, Floors run around $3 a sq ft. These prices do not include excavating, but does include grading the floor. The contractor will be paying about $85 for a yard of crete around here. Clay do a proper drain tile in and out.

 

[toyotadriver]

Thanks for the numbers. A little lower than I expected...but that's a good thing!!

We don't need much of a footing around here since the frost depth isn't deep at all. Less than 12 inches. It can get cold around (0*F) here but never for very long.