Why two spirit houses?

Why two spirit houses? - 23:32, April 16, 2002
On our way back from the south of Thailand, we noticed that most buildings between Hua Hin and Petchburi had two spirit houses side by side--a tall pedestal with a spirit house in the style of a Thai wat and a low pedestal with a larger spirit house often in the style of a traditional Thai house. Does anyone know the reason for two spirit houses?
An answer - 07:45, April 19, 2002
Suchada writes: The smaller spirit house is a shrine for a dead person who has been deified. The taller is the shrine of the household god (or spirit).