What does your DS have in his room? Was it done from scratch like that or did it happen organically, as he grew up? DS's bedroom will be about 4m x 4m.
DS had his own bedroom as a little boy but has been sharing with his sister these past 3 years. Now we are having DD2 to share with DD1 and DS can have his own bedroom. He's not all that bothered and could quite happily continue to share with his sisters, but I'll be working from home 2 days a week from March and I need some proper workspace and thought I could use DS's desk (when we buy one) during the day.