Prehistoric remains show that people have lived in the Munkedal area since the Stone Age. The early industrialization was favored by the rich natural resources, especially the proximity to forests and water. The fjord opened up the area to the world and provided good opportunities for export. These conditions attracted wealthy merchants and traders who boosted the area's economic development. The affluent built lavish manor houses, which led to a concentration of manor house complexes around the inner part of Gullmarsfjorden. The manor houses have origins from the 1700-1900th century and are more or less preserved today. Their strong connection to the area's history permeates the entire study. The result shows that the manor houses possess high cultural-historical values and should be treated accordingly. In the detailed development plan, all manor houses should have legally binding protection against alteration and be marked with the letter "q". With inadequate knowledge combined with insufficient legal protection, the manor houses and with them, a large part of the area's history, are at risk of being lost. Today, several of them are well preserved, but some inappropriate measures have been taken and three have been demolished. Very little of the gardens, park environments, and other farm buildings are preserved.