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Tom has recently bought the house which was his sister, which its roof is being repaired, and which he lived in.

- can i use which was ... , which ... , and which .... to describe the house?

- can i use a house

(y) very thank you
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Are you trying to make this all into one sentence, Tommy? If so, it is a difficult task!

I. Separate sentences:

'Tom has recently bought his sister's house.'
'Tom has recently bought the house which/that was his sister's.'

'Tom has recently bought the house (which/that) she/his sister lived in.'

'Tom has recently bought the house whose roof is being repaired.'

II. One sentence:

'Tom has recently bought the house his sister lived in, whose roof is being repaired.'
Comments  
I saw this unsanwered, so I'll try. I'd rewrite it:

Tom has recently bought the house which she lived in, that was of his sister, and whose roof is being repaired.

Let's see what the teachers say.
 Mister Micawber's reply was promoted to an answer.