The nest is constructed with mud pellets and lined with grass or feathers, and may be built on natural sites under cliff overhangs or on man-made structures such as buildings, dam walls, culverts and bridges. It is often reused for subsequent broods or in later years. The rock martin is a solitary breeder, and is not gregarious, but small groups may breed close together in suitable locations.
The nest is constructed with mud pellets and lined with grass or feathers; it can be found on natural sites under cliff overhangs or man-made structures such as buildings, dam walls, culverts, and bridges. The nest may be reused for subsequent broods or in later years. Rock martins are solitary breeders that do not gather in groups but small clusters might breed close together in suitable locations.