Yes, but of course some conditions apply. Generally, box trailer sides can be made higher, lower or removed completely. This is because our designs are such that the chassis frame is structural and does not rely on the sides for strength.
Changing the length of any plan becomes a bit more complicated. Plans can generally be shortened (in length or width) but not extended (longer or wider). Increasing length or width usually requires bigger/stronger sections. Talk to us about the specific changes you are thinking about making, we are here to help.