About one or two months can be completed. Underground garage belongs to the subsidiary part of the house building, foundation construction is the top priority of building construction, so the construction period will be longer. However, you need to pay attention to the following aspects:

1, before remodeling to carry out a comprehensive inspection to ensure structural safety, so as to avoid accidents;

2, rearranging the space, removing the original facilities;

3, reinforcing the wall, replacing lamps and lanterns to ensure safety;

4, checking the fire safety facilities, to ensure safety and so on.