Final answer:
In the 19th century, the most common building construction method was timber frame.
Step-by-step explanation:
In the 19th century, the most common building construction method was timber frame. Wood, brick, stone, or mud bricks were stacked and piled to reach the desired height, and a lightweight wooden roof was added. This method of construction was widely used and many stone or brick buildings from that time period are still standing today.