"Minha casa não é verde."

Translation: My house is not green.

[Arc7an]

Is there difference between 'casa minha' and 'minha casa'?

[luiz.calheiros]

There is no difference. You can use the possessives in on word "meu, minha, seu, sua, teu, tua, nosso, nossa" before and after the noun. But I want to make you sure if you put right after the thing people will think you want to be elegant.

[Arc7an]

Thanks!

[Reizh]

By any chance, could green in this sentence also mean energy efficient? I'm merely curious.

[Paulenrique]

Yes, you are right! But I think it needs to be used in a correct context in order people grasp its meaning.