Two-bedroom house to be built in a garden on the Ladder

I just received a letter (see attachment) from the Haringey Planning Service. It's about a planning application for a 2-bedroom house, to be built in a garden nearby.

Now I don't want to interfere with anybody's plans, but I can't help feeling that gardens are not houses for a reason, and exist for people to have a bit of outside space, for wildlife, providing drainage for rainwater (esp. in conditions where climate change is likely to cause more frequent flooding) etc. Looking up the application online, I also noticed that the people applying for it are not the ones living at the address. So it does look a bit like it might be an attempt by a landlord to cram in as many people as possible into a space that hasn't been constructed for it. It just generally doesn't strike me as a brilliant idea.

Anyway. Does anybody else have views on this, and what is the best thing to do? I do feel like I probably want to object, but would also like some opinions first, as well as what would be the best grounds on which to do so.

Thank you!