I am hoping that someone might be able to help me with some information. Our back boundary wall is adjacent to a business that sells surfwear and jet skis. A couple of weeks ago we noticed that they were putting up what we thought was a fence, and initially we were not too upset as it would stop them seeing into our garden. Our neighbour however realised that this was not a fence but that they were about to put a roof on and use this wooden structure for testing outboards. They immediately went over and said that they need to stop under the Party Wall Act (we are new here, they are not and they have had many disputes with the owners over the years due to unreasonable behaviour (i.e. testing jet skis all day and late into the evening despite environmental health outlining to them that this should not be the case).
Initially it seems that they stopped the building process, but I have noticed today that struts? have now gone up for the roof. If this goes ahead they will overhang our border line, and well into our garden, and the water from this structure will thus drain directly into our garden.
What rights do we have to stop this or at least seek to get the work a) undertaken so that there will not be an excess of water into our gardens, and b) how we can ensure that they do not use the building (which is made solely of wood) to test outboards, without suitable ventilation at all hours of the day.
Sorry for the length of the post
Thank you in advance.