~ㄴ/은: Attached to a verb to describe a noun where the action occurred sometime in the past. There is no additional meaning given to it. All we know is that at some point in the past, the action happened.

~던: Attached to a verb to describe a noun where the action is recalled to have occurred repeatedly in the past, and continually repeating to the present (or to the time described in the sentence).

~았/었던: Attached to a verb to describe a noun where the action is recalled to have occurred in the past, but has finished occurring and currently does not occur.

I don’t like distinguishing these grammatical principles based on their English translations. Given the number of possible situations that could come up, there is no perfect way to accurately translate any of them. However, the examples below show common translations for each of these grammatical principles in use:

내가 산 집 = the house where I lived
내가 살던 집 = the house where I used to live
내가 살았던 바지 = the house where I had lived.(I didn't live in the house anymore)

Could you explain me?

Could you explain me the grammar - 살던 집?

살다 = live

살았다 = had been living (type of a past participle and progressive form)

살던(살았던) 집? = the house where you had been living at?

여기가 당신이 살던 집 인가요? = Is this the house where you had been living at?