This viola music for Up On the Housetop is in the key of D. Select the image below for a printable PDF of the melody. The Up On the Housetop string play-along page has more versions of this carol, so you can play it with violin, cello, and bass. You can play along with wind, brass, and other instruments by visiting the lead sheet page for Up On the Housetop, which has versions of the carol in seven different keys, in treble, bass, and alto clefs. You can also view and print the lyrics to Up On the Housetop.
See the transposition page for explanations and charts to help you determine the appropriate key to play in when performing with instruments that are not in concert key. More Christmas songs for viola.