Reasonably easy to put together single handed, however, there are areas I would ask you to consider for improvement! The triangle shape does not slip over the tongue and groove top. The bottom bar sits on top of the top bar of the front panel and the groove in the bottom piece of the triangle does not slide over the tongue of the front panel. There are three pieces which are door stops but a fourth piece is needed on the floor. The front of the floor is a groove and is easy to break when stepped on. The fourth piece would complete the square and help strengthen the floor. It would help if the 16 x strips for the window were pre drilled. They are rough pieces of timber and the nails are so small which makes it difficult to hold the strip of wood in place, hold the nail and hold the hammer to knock the nail in! Hope this helps.