We've recently out out that the new neighbours next door are planning a huge extension to the back of their house which means they extend out 4 metres beyond where the back of our houses currently end. Our current view from our kitchen is of blue sky and trees. This will now be replaced with a huge wall (side of their extension). Last year, the new neighbours on the other side built a similar extension which went out 3 metres and we had months and months of disruption, including damage to our property and hassle from their builders. This has already affected the amount of light we get and is also an eye sore for us as we stare out at their brick wall. I'm now depressed at the thought of being hemmed in on both sides and the ever reducing skyline and new view of bricks instead of trees. We don't want to extend not least because we don't have £80k to cover the cost of extending but also because we don't need the space.
I don't believe there is a right to light in the UK and there is already precedent on our street with house owners building these long 4 metre extensions. So I'm not sure on what basis we could object and I'm also conscious of good neighbourly relations. We can't afford to move either as the stamp duty cost is so high. AIBU to raise any objections? I don't think the neighbours will care. They naturally want to build the biggest extension they can. I don't know what my options are. AIBU to express any concerns? They can't proceed until I sign the third party wall agreement.
(On top of this, I have concerns about the months long disruption, the noise as I work from home a lot, the possible damage and impact to our property, them wanting to pull our fence down which we only put up last year. Last year's experience when the other neighbours built their extension was not great - we had damage to our property as well as an inconsiderate builder - which is why I'm dreading this one as I fear we may have a repeat.)