Yes, SODDY is a Scrabble word!

Letter values in Scrabble US: S 1, O 1, D 2, D 2, Y 4.

Is it a valid word?

SODDY is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

a house built of sod or adobe laid in horizontal courses
English chemist whose work on radioactive disintegration led to the discovery of isotopes (1877-1956)

Also: sod house, adobe house, frederick soddy.