I have a thatched cottage with the thatch on all 4 sides, whereas most cottages just have it on 2 sides.Does this or the style of thatching have anything to do with the age of the house?
Yes, the traditional mud and stud cottages in Lincolnshire often had hip roofs. The thatch eave makes an overhang that protects the wall from too much rain so its useful to have it going all the way round. With a brick or stone gable it would not be so important. I guess the shape of the roof has more to do with the building materials of the wall than the age of the cottage.