Maybe I got it wrong or maybe they have improved, but you can now filter for various accessibility features on Trivago.

Looking at a few cottage website the other day I realised that if you have entered dates and there is nothing accessible at that time, then ‘wheelchair accessible’ doesn’t appear as a filter but it will if there are some available – this applies to various sites. Seems like an odd way to do it – other sites show it as greyed out or have a (0) to show there’s nothing available with a particular feature but you live and learn – something to watch out for in the future!