[Grammar] Ted, a 36-year-old man, suddenly woke up

[Nikitus]

Hello.

Are the following sentences grammatically correct?

Ted, a 36-year-old man, suddenly woke up in a apartment located in downtown, whose walls have recently been painted in white, with the certainty that he has fallen asleep again and will be late. That confirmed it by looking at his alarm clock, which is at least 30 years old which he cares as if it were one of his favorite treasures.

Thanks.

 

[Tarheel]

If you just want to know if it should be rewritten, yes. (The first sentence should be three sentences.)

What's the relevance of the walls having been recently painted?

Say:

He felt certain that he had overslept.

And:

He confirmed that by looking at his alarm clock.

You don't need the rest (which is irrelevant and ungrammatical).