noun
friend's house; home of a friend
Neutral term for the residence of a friend. Often used when visiting or referring to the location.
週末に友人宅へ遊びに行った。
I went to visit a friend's house over the weekend.
彼は今、友人宅に泊まっている。
He is currently staying at a friend's house.
友達の家 is a more casual, everyday way to say 'friend's house', while 友人宅 is slightly more formal and often used in written contexts.
Compound of 友人 (friend) and 宅 (house, residence).