"W domu mojej babci zawsze jest czysto."

Translation: It is always clean at my grandmother's house.

[JoanieKatz]

come on, now! Home and House are the SAME.
Especially if it's your Grandmother's personal 'home'

[Jellei]

OK, added "home".

[bluebird998042]

I can't believe you mark it as a mistake just because I missed the Apostroph it is incredible...

[Jellei]

Well, technically it changes "grandmother's" into plural "grandmothers".

I am a bit surprised that it's not accepted as a typo, but well, technically it's wrong.

[Arnoldpitt]

How would you translate : At home my grandmother is always clean? This is how I translated this sentence. What indicates that it is a possessive home?

[Yola448704]

Most of the time, word by word translations do not make sense.

Your sentence is an incorrect translation. It provides information about the grandmother, who is always clean when at home (and dirty when outside?)

The original sentence provides information about the grandmother's place.

[DPan76]

Could you also say "U mojej babci zawsze jest czysto"?

[Jellei]

Yes, we can. And it works here.