One of the reasons why it would be better to build your own darkroom is because it is far less expensive compared to having it developed by “darkroom technicians” who charge overrated fees. If you're sold to the idea of having your own darkroom, here are the things that you have to remember.
A basic darkroom is composed of a sturdy workplace, 100% light blockage and running water. There is the “dry side” of a darkroom where essentially all printing, reel loading and other tasks which do not involve chemicals take place. It also has a “wet side” where all of the chemical tasks are done.
film tanks and reels wherein you load the film to process them.
an enlarger to project the negative onto paper
a paper safe where you will store printing paper.
a safe light which will give you light which is close to the color amber so you will be able to see what you are doing without ruining the paper
timer for your exposures
easel which will hold the paper under the enlarger as it is being exposed
a grain magnifier for the enlarger
rotary paper cutter for your photographs printed on the printing paper
dodging and burning kit so you'll be able to adjust exposures to parts of a photograph
enough storage space for the above materials
running water with temperature control
sink that's big enough for different trays
deep tray with holes on one side
short hose to be used for the deep tray
four 11x14 trays
print tongs for handling the paper
film clips to hold the paper
different containers for mixing of the chemicals
surgical gloves and face masks
These are the materials. You also need to remember a few things while constructing your very own darkroom. You should remember to ask help from people who know the best materials. There are even pre-packaged kits for darkrooms. This will most probably ensure that you have all of the materials you need. This is a good starting point however your needs might increase as you become more frequent in taking pictures.
Be sure to block all light sources. Even those that seep in through the window's small crevices. If you absolutely cannot work without light, then a changing bag might be the best option for you. Also remember to have ample ventilation. This is for the different chemicals one will be exposed to.
Also remember to have enough electrical sockets because of the different electrical equipment needed to develop your film. These are the timers, amber lights, dryers and the enlarger.
Be sure that you have enough space to be able to move about and not knock things over while you are developing. There's nothing more frustrating in knocking off the piece of stop bath you need for your pictures. These are just a few reminders on how to create a personal darkroom. When you are ready to push through with this endeavor, then it will be a rewarding experience once you get through it and look at your very first print.