You know how kitties are! Some of them just can't handle disruption within their territory. She really should go to the vet to rule out UTI but this may be her only way of letting you know just how stressed the remodeling is for her. Have you got a litterbox in a private spot away from noise and strangers? My cats get very nervous with strangers coming in and out and they don't deal well with lots of noise. We have lots of company around holiday time and they will hide out upstairs so I always put a litter box, food and water upstairs for them. They have to have a safe spot where they feel like nobody can get to them. Even if her litter box is in a private spot she may not want to even pass the noisy, full of strangers area to get to it. If it's not UTI then I would try to find her a quiet spot and put her litter box there. She is just trying to tell you that she is either in pain or very very stressed. Give her lots of lovin and hopefully it will all be over soon!! Poor baby. Hope I was of some help.