Begin your desk plans by determining how you will use the finished desk. Besides space for a computer, consider including shelves or enclosures for the computer's various components, such as printers, external drives, a keyboard and a mouse. If there is space in the room for a larger desk, also consider space for a router or modem, as well as storage for CDs, DVDs and general office supplies.
Measure all of the computer components you plan to store or house in the desk. Looking at pictures of desks or visiting a furniture story may help you get ideas for the layout of your desk.
Purchase lumber for your desk. Although a computer desk can be made of many different materials, wood is best for cost, ease of construction and long-term durability. If you plan to paint the desk, use inexpensive plywood. For a more formal desk, use oak or pine and make plans to varnish or stain the wood after the desk has been assembled.
To determine the size of your desk as a while, measure the space in the room where it will be used. Also, measure your desk chair. Do this by measuring from the ground to the level of your arms when seated in the chair. Use this measurement to determine the height of the space under the desk so that you will be able to type comfortably without putting strain on your arms.
Begin by building the base of the desk. Next add shelves and drawers, and finally affix the desk surface. This is the best way to make sure that your desk can support its own weight, along with the weight of a computer and other items.
Join your desk together using wood glue and small, stainless steel nails. Clamp all of your joints and allow the wood to dry thoroughly before attaching the next piece. If your carpentry skills are more advanced, consider using a decorative technique for joining corners such as a tongue and groove or dovetailing.
During the construction, make sure that any enclosures that will house computer components are fully ventilated to prevent the devices from overheating. You can leave the back of the desk open if it will be placed against a wall, or affix lightweight wood paneling to serve as a finished back. Cut holes in the backing to allow access to the devices and for the cables that will connect them.