A gift or celebration given to someone who has built or bought a new house (housewarming); can refer to the party or the gift itself.
友人が家を購入したので、新築祝いに観葉植物を贈った。
A friend bought a house, so I gave a potted plant as a housewarming gift.
新築祝いの席で、親戚がごちそうを振る舞ってくれた。
At the housewarming party, relatives treated us to a feast.
新築祝いの相場は地域や関係性によって異なる。
The typical amount or type of housewarming gift varies by region and relationship.