The owner, Angeles, has been very kind before and during our stay in Madrid. Unfortunately when we booked the flat we didn't read about any works in the building in the notes that described the flat on the web site of airbnb. Really these notes were reported in the bottom of the text (“En la actualidad se está restaurando la fachada de la finca y la escalera interior, pero eso no afecta al interior del apartamento”) but I read them after my return...That was my fault.
Anyway, after the unexpected impact with work of renovation of the facade, the following morning we had the bad experience of hand and pneumatic drills in action starting from 8,30 a.m. exactly at eleventh floor, that of the flat. I advised Angeles immediately of the big noise. After this hard beginning in the next days we did not have other problems. We never met Angeles because she was out of Madrid but I have to say that she satisfied our request of food for breakfast and more in general she answered fastly to all questions we sent to her also because her son - that received us at arrival – has not been more reachable in the following days.
I believe that Angeles is in good faith and that a chain of accidents and misunderstanding has unfortunately damaged us in this circumstance. I also believe that sensitive information - like work in progress in the building - should be reported at the top of the description of the flat, not in marginal and less visible position. It would appear more honest with the client.