Cost for Garage concrete slab

[Rusty105]

OK, need some advice and cost numbers on this one.

We are looking at a house that has a garage addition. It was done 10+ years ago. What they did was build a 22x28 garage over the existing driveway, one of the walls is the existing wall of the house. Other than the asphault floor, it looks like it was done well. If we buy the house i would like to get rid of the blacktop floor and pour a concrete floor. Any idea what would be involved, and cost? We are in New York. Also, how hard to DIY a door opening cut into an 8 inch poured concrete wall??

Thanks
Rusty

 

[uncletater]

Also, how hard to DIY a door opening cut into an 8 inch poured concrete wall??

Hire this out.

Taking up the asphalt could be a DIY. Cutting a 8 inch wall is not in my opinion.

 

[Rusty105]

Also, how hard to DIY a door opening cut into an 8 inch poured concrete wall??

Hire this out.

Taking up the asphalt could be a DIY. Cutting a 8 inch wall is not in my opinion.

I was thinking the same, but had to ask.

I think we could rip up the asphault, scrape out enough materiall to then go back with the base, then have someone else do the pour and finish. I can do smaller pads, maybe 10x10, but have no confidence in a 22x28.

 

[uncletater]

Agreed. I can pour small slabs but a space that big I will leave to the pros. My luck it would come out looking like **** and I would have to bust it up.

 

[shaun oriold1]

OK, need some advice and cost numbers on this one.
Also, how hard to DIY a door opening cut into an 8 inch poured concrete wall??

Are you sure its a poured concrete wall above grade? Thats not very common, unless you're buying a concrete house.

 

[Rusty105]

Are you sure its a poured concrete wall above grade? Thats not very common, unless you're buying a concrete house.

Yep, 95% sure the wall that is part of the house is poured. The other walls for the garage may be block, will have to look closer in better light. The reason I am 95% sure is that I can see the outline of the forms left in the wall. The entire lower level is contrete. I would estiimate that 75% of the lower level is below grade on both sides and back of the house.

 

[stikman56]

I just priced it for our home build in Washington State. $3.52 a sq. ft. for 4" thick.

 

[uncletater]

I paid 1900 for a 24 x 28 slab in NC

 

[kbs2244]

Installed concrete varies a lot by area and season.
You need to get some local quotes.

What kind of foundation is under your garage walls?
From your description I would wonder if this was a permitted and inspected job.
An attached garage should have a perimeter, below the frost line, foundation.

 

[Rusty105]

Installed concrete varies a lot by area and season.
You need to get some local quotes.

What kind of foundation is under your garage walls?
From your description I would wonder if this was a permitted and inspected job.
An attached garage should have a perimeter, below the frost line, foundation.

Remains to be seen/discovered. Will have to go back for a more intense inspection. Garage goes back many years, if you look on Google Earth and use the time slider, I can make out the garage in 1991. But the town has good records, so I may be able to pull the original permit, maybe...

 

[Rusty105]

Following up a little. Acording to the permit at the town hall, the garage was added in 1972. Aside from excavating the walls down to the footing, how can I be sure there is a proper footing? I would think with 40+ years of freeze/thaw there would not be much left of the walls if there was not a proper footing??

Thanks again

 

[bczygan]

Here is what I would do.

First ask if you can have an inspector do an inspection that includes excavating the foundation at 3 places to see what it consists of. And also at at least one place to see what is under the asphalt paving in the garage (It could even be old concrete).

If the seller won't agree to this, assume a worse case condition in every respect, and get bids to remedy that condition completely.

Decide on your offer for the house and reduce it by that figure to account for the costs you will incur when you buy it.