To say 'No' to this viewing?

[DoWhatWhen]

Renting a holiday cottage and we've just had a message from the owner asking if we would mind an estate agent bringing people round tomorrow for a viewing.

I don't want this to happen as I feel like I'll need to stay in to keep an eye on our stuff or lock valuables in the car. We had planned to be out at the time the viewing is taking place.
I also don't want to have to pack all of our clothes into the cases.There aren't any wardrobes here so we've got clothes on chairs in the bedrooms.

When we arrived and saw the 'For Sale' sign we did ask if there would be any viewings and were told no but the owner is saying the viewer can't do any other time.

AIBU to refuse to let them do a viewing. Can I actually refuse to let them?

Yes, all of what Dungeon says. Plus the owner told the OP when she asked that there wouldn't be any viewings while she was there, so they've reneged on this. That's more to the point for me personally.

Ok. I accept some people might find the brief intrusion a much bigger deal than others. That's why it's not U to refuse. But given that lots of people wouldn't be bothered at all I still don't think it's in the least U for the request to be made.

But given that lots of people wouldn't be bothered at all I still don't think it's in the least U for the request to be made.

Alternatively, given that a lot of people would be very bothered it is unreasonable to make the request. Not everyone will know that they can refuse and some people find it quite difficult to say no. People shouldn't be put in that position when they have paid for a relaxing holiday, particularly considering the high rates that are charged in August. At the very least the owner should have offered a partial refund when making the request.

I’d be cross to even be asked tbh. I tend to live quite messily in holiday cottages (always leave them pristine, but take the chance to relax a bit during the week) and would feel I needed to tidy up. If I said no, I’d end up feeling guilty and that would affect the holiday too

This ^^

And its in Ireland, it has been pissing down all week I wouldn't want people in tramping their wet feet everywhere