I was surprised to find a nice hotel with clean modern rooms at a reasonable price close to Heathrow. This hotel is about a 500m walk from the Osterley underground station, but is convenient enough to walk if you don't have too much luggage. One can walk from the hotel to the station, grab the underground train, and be at Heathrow in 30 minutes.
The hotel is modern and well kept as of June 2013. Staff was slow and not particularly friendly but the room was a pleasant surprise. Bar closes at 11:00 on weekdays.