hey julia888, since pim is abroad and probably not here as much as she would like to be, i can field this one (i think).
yes, those are euros per month. there is also most likely a 1 month security deposit as well to be paid which you get back when you give up the room.
there are a LOT of available rooms and flats in madrid these days due to the mass student exodus out of the city for the summer.
270 euros/month is a good deal if sharing with a few others.
the area is very residential and not a long metro or bus ride to the city center. it is also just about smack in the middel of the casa de campo if you are into that.
at any rate, if you are interested you should telephone or e-mail Marcelo as indicated above by pim.
saludos,
jer...