When did people start using concrete for basements?
Cement blocks would make it newer than a poured concrete or a stone wall basement. Without architectural features of the house it could be when cement blocks were first created right up to the present. The type of wiring could be a clue: fuses, circuit breaker box and the date on the panel, the type of wiring, the outlets. The slope of the roof is another indicator of certain styles or times of buildings. Genreally, the more modern the house, the lower the ceiling, until recently. If it’s a ranch style house, block basement and the electrical outlets aren’t grounded, it could be 50s or early 60s.
