住宅 is a formal term for residence or housing.
COMMON COLLOCATIONS:
- 住宅ローン (housing loan, mortgage)
- 住宅街 (residential area)
- 住宅価格 (housing prices)
- 公営住宅 (public housing)
- 集合住宅 (apartment complex)
- 一戸建て住宅 (detached house)
COMPARISON:
- 住宅: housing (formal, often for policy/statistics)
- 家/住まい: home, residence (general)