Buying / selling property with annex for multigenerational living.

[Brambblee]

Hello we are in the process of selling a house with a large self contained annex, ideal for multigenerational and or those interested in a holiday let/ Airbnb.
Are there any websites/ specific locations that people use when looking for this type of property?

I think there is a Facebook page for Airbnb homes for sale UK
Also there seem to be a lot of Facebook pages for local areas where you could list and anyone googling those key words could find you