I had a very good stay at a hotel on probably the best street of Sapanca. There is a big lawn with seating places at the front of the hotel where you can sit, eat or drink something. And the room has a kettle, so you can even have your own tea or coffee. The owner of the hotel is as well an intellectual, hospitable and friendly person. It is true that there is a not-so-busy street where the long lawn ends, but I think noise of the cars passing by every now and then could not disturb anybody.
If you are looking for a modest place and not luxury, this hotel will serve you well considering its price, the hospitality, quietness and its bucolic atmosphere.