You must also consider what you want to do with the space that's present in your attic at the very moment. You may also wish to expand your attic while converting it and this can be done properly as well. Should you find any specific task that you want to complete after that, it would also be ideal to prepare them ahead of time. In a project such as this one, timing is everything and an experienced contractor would know how to work things out on schedule.
When considering attic conversions keep in mind you will have to have a staircase, add some kind of window or windows, install electricity and possible even put in a phone line.Other portions of the attic conversion to consider could include wall framing, ceiling, drywall, heat, air and plumbing if you need water or a bathroom. Plumbing and electricity are two main areas that should be completed by a professional. It may cost you more upfront but it can save you trouble later on.
Before heading into a renovation it is vital to know exactly what you are getting into, or at least as much as possible. After you have cleared all the clutter, furniture and cobwebs out of the space take a close look at every square foot of the room. You are looking for signs of critter, bird or insect intrusion, mold, rotting wood, asbestos (depending on the age of the house) and the general condition of the space. If you suspect there is asbestos please be sure to contact a professional to come and test your insulation, as asbestos can be harmful to your health. Check to see if there is insulation under the subfloor. If the walls are dry walled, cut out a small hole in each wall to check for insulation.
Repairing any existing damage or elements of neglect is important, as a renovation should begin with a clean slate. Design the space in terms of what you want, taking into account all the elements of the room. Consider electrical, plumbing, structure, height and windows. Now let's move on to the rest of the process.