Please could anyone advise me on the laws/regs regarding ownership of a property in Spain.

I am officially resident, partner is not. 

We are looking to (jointly) purchase/own a property here.

I have heard that if the owner is non-resident then the IBI/other bills - basura, comm fees etc? is higher and you also have to pay a tax as if you were earning rental income - even if you don’t!
Would we be better to register the property in my name only? Or is it possible to have a resident and non-resident on the escritura etc… and not be landed for non-resident taxes on it?

Also… Can anyone remind me regarding the annual ‘Declaracion de la Renta’.  I have not filled one in for 5 years as basicaly I have been unemployed (and living on handouts from parents - UK based).  Is there a minimum threshold where one does not have to fill one in each year, or am I going to be in trouble when I file one next year if I become a property owner?!

PS - The value of the property we are looking at (well the sale price anyway!) is Euros 35,000. Not sure if this is important in the decision making on above.

Thanks to anyone how has the know!