White floor base constitutes addition. These areas will need new foundation. Celings will be vaulted in MBR and MBA. MBA location is designed to reduce cost because it shares a wall with existing bathroom, thereby enabling straightforward connection to water/drainage. NHD labels are new heat registers/vents. New hardwood floor will be needed in MBR and MC. Would like floor to match existing hardwood in house in terms of strip width/stain/oak. Would like to expose existing redwood beams in MBA. Would like to expose existing/new (matched) redwood beams in MBR.