Thanks for your answer, I will take a look.
Thanks Ferdinand,
They presented me a plan with no encroachment and explicit saying that under any circumstance they will pass the boundary. He is going to change it, so it should be fine. No outlets, so that's good.
Yeah, is not a problem of space is taking for granted that you can do whatever you want. Really cheeky attitude.
Yes, is not the best problem of the world, however when someone agrees that this is not going to happen then... (problems arise).
In summary, after presenting their planning an their emails they are going to fix it. Happy ending I guess.
Thanks everyone for your responses!