on building a home recording studio

hi guys :D my name is tutti caringal from manila, philippines. i'm planning on building a home recording studio. there's no existing room yet as the house is to be renovated. so i'm building the room from scratch. i have absolutely no idea as to how to build one. i'm only basing it from the designs in this site. the room space i have is approximately 5x7 meters which includes the mixing room already. what is the ideal height for that area? how should the walls be treated with regards to materials to be used, symmetry, sound proofing, acoustics, floor, etc. i would appreciate it if you guys can help me out. there aren't many people here who i can consult about this. thank you :D