AIBU about not allowing in laws to smoke in a house we bought them?

[LaraAxelrod]

We are in the fortunate position of being able to buy a house for my parents in law to live in. They wanted to move back to England but didn't have enough money of their own to buy somewhere nice close to us. We have therefore offered to buy a house which they can live in. They are both heavy smokers (30+ a day each). The idea would be that it's an investment for us. However our daughter has asthma and I am worried about 1) her being able to even visit the house and 2) how badly the smoking will have affected the house when it comes to selling it on.

Is it unreasonable to expect them to smoke outside or even just isolate their smoking to one room?

I would do what haffdonga^ says. Tell them you are happy for them to live in your property rent free but only if they agree not to smoke inside. I don't think that's unreasonable at all. Nobody I know who smokes does so inside their house because it really damages properties!

Not unreasonable at all, with smoking that heavily it will ooze out of the plaster and ceiling even if you re-paint. You should have had this discussion earlier though.

My friend had to have a property gutted due to smoke. Stripped back to brick and replastered. Smoking indoors would damae and devalue your property. It should be non-negotiable. If they don't want your gift, rent it out.

I don't think you are unreasonable at all. I say that as an ex smoker (20+ a day - quit 4 years ago). I have never smoked in my house. Ever.

YABU to let them live there rent free. If they are not paying any rent & you have agreed to that, there is no contract therefore you have no rights to enforce any conditions. You could charge them a nominal rent but it would count & if they breached the conditions, namely no smoking indoors, you could do something about it. (NB I'm not a solicitor, I just work in the industry.)