Ballpark on basement work
Hello, I have around 800sf of space which I would like to convert into an office space (more questions about the way to approach it I’ll ask in another post), the things I want to do- 1. the ceiling is now about 7 feet. I would like to dig to make it 8-9 feet. 2….
Hello,
I have around 800sf of space which I would like to convert into an office space (more questions about the way to approach it I’ll ask in another post), the things I want to do-
1. the ceiling is now about 7 feet. I would like to dig to make it 8-9 feet.
2. installing small toilet room (there is already piping set for it)
3. enlarging the two windows.
4. digging the front of the house to create a niche for the windows which face the street, and stairs to lead into the door.
I know it is hard to give an estimate but I would appreciate it if someone could give it a shot.
Thanks.
hello, i’m an architect wrapping up a project very much like this – a 900 SF basement we lowered 18″ to make an office, laundry and playroom. you won’t necessarily need to underpin the foundation – there are lots of options including reinforcing from the interior of the space. you will absolutely need an architect or professional engineer to sign & stamp for the DOB – structural work must be filed for approval. permitting and neighborhood approvals are not that much of a hassle. it really depends where the building is located. the cost of digging out and related structural on the current job was about $45K and to be safe, i would at least double that figure for total construction costs. a minimum planning multiplier for interior renovations with structural work would be $150/SF so in the ballpark of $100K. Please feel free to contact with questions – we are always looking for more projects!
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You won’t be able to get an accurate estimate without more information.
For example, you want to dig down 1-2′ below the existing slab. The cost of this will depend on the depth of the existing foundation. If your foundation wall ends only 6″ below the current slab — which is the case in many brownstones — then you will indeed need to underpin the foundation walls as eman1234 noted. This is definitely expensive. You can get a contractor to dig a test pit in a corner of the basement to assess the existing conditions of the foundation wall.
You definitely need an engineer or architect for this work. There are structural & waterproofing issues that must be properly addressed.
This is a big job..You have to do a lot of things.
I think you should call this company City B.R.C. They will be perfect for your job i think.. To contact with them phone no is 718-219-9911. or you can mail them citybrownsotne@yahoo.com.
Please send mail or call Cyrus at 347-743-2435 for meeting and estimate.. Good work done when I did mine
I think what’ll cost the most will be the “niche” out front and the windows.
You want to dig up your airy way, add stairs, windows, etc, etc. I get why you want to do it but I can only imagine the DoB permit hassles you’ll have to go through as well as the neighborhood hassles when you are jacking up your front…
That’s not accurate, actually. I had this done in my house, same size space, and no foundation work was required. It depends on by how much you want to raise the ceiling. But it’s true that it was expensive. You’ll probably also need electrical work done. My ballpark estimate is $40K based solely on my own experience.
a lot…just to lower the floor you will need to underpin the foundation..