"Su casa es su casa". In Spanish, the posessive pronouns for "Your" and "their" are the same. To avoid confusion, you could say "La casa de usted es la casa de ellos".
house = casa
'in-house' - interior, interno/a
el casa = a house
"hen house" translates to, "gallinero" in Spanish.
en la casa del mayordomo is the spanish for at the butler's house
old house = casa vieja.
A beautiful house in Spanish is "Una casa hermosa".
tu casa es mi casa
casa nueva
Casa blanca
en mi casa
Casa abierta