Putting it together took me 4 hours, but I'm 5'5 115 lbs and I did it all by myself!  So it can be done.  You'll probably want an electric screw driver for the L brackets on the back side of the stairs, but otherwise the supplied tools are adequate.  Also, I'm echoing what another reviewer said: LAY EVERYTHING OUT IN ORDER BEFORE YOU BEGIN.  Figure out all of the hardware (I made piles on top of the pictures) because they many are VERY similar.  Each piece of the bed is numbered so i lined those pieces up.  Made it much better.  My only complaint is the smell.  I've had the bed for over a month and it still has a very noticeable painty/varnishy smell.