I had a good time in this very authentic fishermen's house. João gave me a warm welcome, even with a basket full of wonderful things (fresh bread, mild, jam and eggs from his hens!) and a lot of recommendations for the nearby area.
The house itself is really nice and I especially enjoyed the fireplace. Keep in mind Portuguese houses do not have a proper heating, so it can get colder. There have been two movable heaters plus the fireplace, so I was perfectly fine during my stay.
The house is located directly at the street. Although it is calm at night, you can hear the (bigger) cars during the day.
Assenta and it's two beaches was a quite and wonderful place to stay. Be sure to visit the fish restaurant in the harbor- one of the best I have been so far!
You definitely need a car to move around. Great spots for surfing in nearby Ericeira and St. Cruz.