"She would need a bigger house."

Translation: Ela precisaria de uma casa maior.

[Libor]

would not 'mais grande' work here?

[Importuno]

"Mais grande" is not correct in portuguese. It would be same as saying "more big" instead of "bigger"

[fredodo]

Would "Ela precisaria de uma maior casa" be OK? Or is it more natural to put the maior after the noun in this case ?
Thanks.