From UW main campus:

• Go south along 15th Ave NE and cross NE Pacific St.
• Bear left to Columbia Rd. and pass through gate house
• Continue along Columbia Rd.
• There will be a small blue CHDD sign on your right
• Walk towards the end of the main CHDD building and across the elevated bridge
• This is the CHDD South Building. Enter and turn right. IDL is in room 202