Translation of "big house" into Spanish

Successful real estate agent, sells big houses to folks escaping crime in your city.

Un agente inmobiliario exitoso que le vende casas grandes a gente que huye del delito en su ciudad.

She should be at school, you know, not rattling round a big house on her own.

Debería estar en la escuela, ya lo sabes, no dando vueltas sola en un viejo caserón.

He's been rattling around in that big house on his own for too long now.

Si, ese lleva ya mucho tiempo solo en esa casona.

A big house will be built.

Será construida una gran casa.