The property next door to my PPOR was bought by an investor whose intent was to develop it at some point, so periodically I would check the council online facility to see if any development applications have been lodged, more out of curiosity than anything else. The other day I found that he has in fact lodged an application. Some quick facts :- - The block slopes away from the street. From the front of the block to the back is roughly a 1.5 metre drop. Currently, colorbond fence just follows the natural ground level. - In the proposed plan the site next door will be filled in to level it off to street level, presumably for storm water run off, as the alternative would mean some sort of pump system. - In the proposed plan, in order to fill in the site, there is provision for what looks like a retaining wall of roughly 35 metres in length. The height of the retaining wall increases as it's going along the length of the block. The top of the retaining wall looks like it's meant to be in line with street level. I'm a bit concerned about this as I've never had to deal with anything like this before, and just thought I'd ask some of the experienced people here at propertychat if I should be doing anything now rather than waiting until it's too late. So, my question(s) to the propertychat community are (in no particular order) :- - Should I be worried or concerned about this ? - Does my neighbour need to get my approval ? - If he does, could I object and insist he doesn't fill in the site ? - Is my assumption that he's filling in the site just for stormwater runoff incorrect ? Could there be other valid reasons for filling in the site ? - If in fact a retaining wall does need to be built, what about on-going maintenance in the future ? - The existing colorbond fence is in fairly good condition. I assume it would have to be knocked down and replaced. Can I insist he puts another colorbond fence in it's place ? Anything else I need to consider that I haven't thought of ? I've attached a pic of what the development will look like looking at it from my PPOR.