If I allow them to install curtains, then the installer will need to drill holes on my wall. I'm not going to pay for the installation cost. Under the lease agreement, I have a provision that says the tenant will bear the cost of any modification, subject to the landlord's approval. I also have a provision that says if she moves out, the apt will need to be under the same condition when she first moved in. If she moves out in a year or two and removes the curtains at that time, I can take money away from her security deposit if she doesn't patch the holes and paint the wall, right?
更新1:
also, under the lease agreement, I do have a provision that says I can make deduction from the security deposit if there is any damage.