en la casa del mayordomo is the spanish for at the butler's house
house = casa
'in-house' - interior, interno/a
el casa = a house
"hen house" translates to, "gallinero" in Spanish.
Butlers, valet, chefs.
old house = casa vieja.
A beautiful house in Spanish is "Una casa hermosa".
Wealthy households in Victorian times would typically have maids and butlers.
tu casa es mi casa
casa nueva
Casa blanca
en mi casa