I`m interested in hearing what happens here. My next door neighbour has plans to remove 100% of the grass on her property and replace it with interlock. I`m not very happy about this, but I don`t want to start a war.

Still waiting for Engineering to call back. But I highly suspect what the admin told me was entirely true. I cannot be the first one in the entire neighbourhood who is thinking of replacing the grass with something else more useful or requiring less maintenance.

But your last sentence is interesting... why are you not happy about your neighbour wanting to do the same thing I am planning to do? I don't understand how that would make you upset. Are you concerned it will cause drainage problem to you? Do explain please.

First of all, being right next door, we share a lawn and the space between the houses, all of which is grass. Secondly her house grade is significantly higher than mine. I'm concerned that if it's not done correctly, than I will suffer with the water drainage problems. She wants a 100% maintenance free (ie. sealed) interlock, which means it will have to be sloped away from the house.. towards mine.

That's a valid concern. I'd assume if it's done by experience contractor, perhaps one of those highly rated landscapers from homestars.ca, that they would know how to do it correctly. Plus, I am thinking there is always an easement in one of the house(s) around the neighbourhood to help ensure rainwater drains properly. But by all means if you could spell out exactly how you think it should be done correctly, I am all ears. I'll help make sure the contractor follow whatever you think is the proper way... unless he has a better suggestion/approach.

By the way, unlike your neighbour, although I am removing all the grass, I am not replacing it with just stone patio. Towards the fence, I am keeping flower beds and there will also groundcover planted. On the other hand, I am also using HPB to help make sure proper drainage (from my perspective obviously). But does that change your view/fear?

I am interested in your insight because my back neighbour and the two houses adjacent have grading that are indeed lower
than mine. One of them already freaked out when I build a pergola in the backyard, complaining how tall it is/looks. Only to realize that it's really only 9 feet tall and that my grading is about 1.5 - 2 feet taller than theirs.

Why would anyone want to get rid of nice green grass and replace it with stone/concrete/whatever?

In our situation, the lady next door is elderly and wants a maintenance free yard.
Currently I do all of the maintenance for her, but as she quotes "This is my last home, I'm never moving again. You won't be my neighbour forever and no one will be here to maintain the property when you move"

So don't move!

Why would anyone want to get rid of nice green grass and replace it with stone/concrete/whatever?