We really need a downstairs toilet. One preteen and one teen, two adults and an upstairs bathroom is manageable but a second, downstairs toilet would make life easier and possibly add value. However, I also have three relatives with mobility issues and the stairs are becoming impossible for them which means they can't visit.
We originally quoted up for a small extension from the back door out to the kitchen window which is big enough for a toilet and sink but it's ££ and financially, not the best choice as we wouldn't add the value compared to the cost.
Every builder (and MN!) suggested converting the cupboard under the stairs as a cheaper and quicker option but the builders have all said we would have to brick up the back door and incorporate the back vestibule/hall into the toilet because just the space under the stairs wouldn't meet building regs. The problem is that it would mean the toilet door is off the dining room which makes me deeply uncomfortable.
I don't want to do it if when we come to sell, it puts people off and it's as weird an idea as it feels but we really want a downstairs toilet so that my family can visit and we can have a wee when the main bathroom is occupied.
Have I missed an obvious solution? Other than moving of course.