You can easily install a shower door on your own with a few tools and some free time on hand. The materials for shower door installation would cost between $300 and $500. As long as you are completely focused on the job at hand, there is no reason why you shouldn't be able to install a new shower door on your own.

First, make sure that you have the right sized door. Measure the size of your enclosure and if you are installing a swinging door, measure how far the nearest obstacles are to your door opening.  Once you have all the right materials, the first thing that you will install is the base track.  This helps to keep water out and your door in place.  Cut the base track to the length of the shower opening and install it at the center of the shower's lip.  Mark its location just in case it slips during the rest of the process.

The next step in shower door installation is to install the vertical jambs.  Use a level to make sure they are at a 90 degree angle with the base track. If you are installing a swinging door, you will install the hinge side track first; if it is a sliding door, you have to do both catch jambs.  In order to ensure that your jambs stay fast as you start to drill into the wall, mark the screw holes with a pencil when the jamb is in place.  Then use an awl or punch to chip the glaze of the tile so that your drill will go in easily. Drill the holes, tap in plastic anchors and then screw your jambs to the wall.

Next to hang your shower door.  For a swinging door, make sure that it is hinged to swing out and slide that side into the hinge track.  Use a level to make sure that your shower door is hanging properly. Unless your walls are warped, you should have about ½ inch of wiggle room around the jamb.  Once everything is level, screw the door hinge into the hinge track.  If it is a sliding doors, you should be able to slide the doors into their wall tracks.  Again, you may have to make small adjustments if your walls are not properly aligned.

Once your doors and side jambs are in place, the last step of shower door installation is to put in the header.  It should be in alignment with the two side jambs and screwed into place.  Keep the door open during this part of the installation to make sure it doesn't interfere with your plumb line.  Once the major components of your shower door are in place, you can install the handle, door framing, and drip rail.  Finish the shower installation project with waterproofed caulk.