After a bit of advice please. We've had notification of our neighbour having submitted a planning application for a rear single (part converting an existing detached garage) extension and side double storey extension. After initial surprise, the rear single storey extension seems fine but the side extension is a bit more concerning.
The side of our detached property is at the rear of their detached property (newish build so not massive gardens anyway) and our garden is beyond their boundary (hope that sort of makes sense).
I think my main concern is the double extension is a gable to the rear end and this is beyond the existing line of their building, and two new Windows. Our stairs window is probably the only window effected and this gives us all the daylight into hall stairs landing, and I think the extension will effect this.
I've read about the 45 degree rule but not sure if this effects all Windows or if applies at all. I don't think I would have been so concerned if they had extended the existing 4 sided pointed roof somehow and not broke the existing boundary. Also we will loose some privacy and light into the garden.
Also the plans look like they are having an additional 3 bathrooms, their drain already runs under our patio which frequently gets blocked which we have to sort.
The existing house is 5 bedroom and this will make it 7 bedroom and 2 offices in the loft (I think they will loose an office downstairs).
Sorry about the long message, but is it worth objecting, relations are okish with them but I'm not bothered about upsetting them as they weren't bothered to let us know what they were planning (not that they have to but they could have given us a heads up).