Although both riads and dars are traditional Moroccan townhouses, there are some differences in their architecture. Riads are known for their central courtyards with gardens, fountains, and often elaborate decorations such as mosaics, ornamental arches and wood carvings. Dars, on the other hand, are usually smaller and plainer than riads. While they too may have a central courtyard, their decoration and architectural style varies greatly depending on the region and owner.
However, one should always keep in mind that the terms "riad" and "dar" tend to be used interchangeably and especially riad is often used for advertising purposes.