Tudor houses were mainly made of wood and are sometimes called 'half timber' houses because they were timber frames filled in with wattle and daub (a mix of interwoven branches, the wattle, and mud, the daub), mortar, brick or some other fill. They would still be called half timbered even if the ground floor was made from stone or brick.
To extend a Tudor House you just added more frames to the front, back, sides or top as you needed.
In most houses there were no sanitary facilities. Water had to be brought from the nearest well and any slops or human waste was just thrown out of the window onto the street!
This encouraged vermin like rats and mice and led to health problems such as cholera, plague and dysentery.
Chimneys and enclosed hearths were a new feature that heralded the decline of the great hall and open hearth. The chimney allowed hearths to be placed upstairs, which encouraged the design of multi-storey buildings. Chimneys tended to be quite tall and were often decorated on some of the bigger houses.