noun which may take the genitive case particle 'no'
house-to-house; door-to-door; each house
Used as a no-adjective to describe activities done at every house, such as visits, deliveries, or surveys.
警察が戸別訪問を行った。
The police conducted house-to-house visits.
戸別配達はコストがかかる。
Door-to-door delivery is costly.