When can I come and see it?

• This is something you might say if you are trying to rent somewhere to live.
• This means: 'when can I come and look at the room/flat to see whether I want to live there or not?'
• It = the room / the flat
• Remember that, as it's a question, it's not 'I can come…' but 'can I come…?'

This sentence is an example of houses, renting a flat.