My son built the loft all my himself.  He is sixteen yrs old.  He wanted to do it by myself and he finished it with no problem.  I just had to assist with holding the sides so he was able connect it.  He loves his new loft.  It gives him so much more room.  He has more floor space in the small room he is in currently.  He has even added lights on the underside of the bed.  They change colors.  He is very happy with the selection he made.  He had picked several options for a bed but the loft was perfect because it has a desk for when he needs to study for school.  The under desk tray is great for easy access to documents.  We are seeing about adding some shelfs on the sides of the loft.  We are very happy with this purchase.