If they haven't been there very long depending on construction you just may be able to get them from the exterior. If you would describe the house or have pictures that would be great. We would be more than happy to give you any tips you might have.
Could be up to 6 months. Unfortunately they are behind a deck. I tried taking a picture with my phone but the sun was in a horrid position. This is the best I got.
You can sort of see one of the floor joists sticking out on the left side of the picture. Originally those joists were the support for the deck but those were cut off years ago.
The other cutout that was done in this house was about 7 ft deep in between two joists. That one was done from the due to the deck as well.