noun
every house; each household
Often used adverbially with に (〜に) to mean 'at every house' or 'from house to house'.
新聞配達は戸ごとに新聞を届ける。
The newspaper delivery person delivers newspapers to every house.
戸ごとに違う花が植えてある。
Different flowers are planted at each house.
Similar meaning 'every house', but 家ごと is more colloquial and uses 家 (house/building) instead of 戸 (door/household).
Compound of 戸 (こ, 'house') + ごと ('each, every'). The reading こ for 戸 is an older or literary reading, while ごと is a suffix meaning 'each'.