dwelling house

NOUN
14 LETTERS · STARTS WITH D

dwelling house is a valid 14-letter word worth 21 points in Scrabble and 25 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
D2W4E1L1L1I1N1G2H4O1U1S1E1
2 + 4 + 1 + 1 + 1 + 1 + 1 + 2 + 0 + 4 + 1 + 1 + 1 + 1 =21 PTS
DOUBLE WORD → 42TRIPLE WORD → 63
MEANING

What does dwelling house mean?