Horizontal cracks in interior and exterior walls (semi-detached house)

Hello,

we are interested in a semi-detached house built in 1993. The solid house is located on a slope. The outer masonry is 30 cm thick, the concrete partition wall to the other semi-detached house is 24 cm. Interior walls are made of calcium silicate solid brick (KSV) and 24 cm thick.

In the ground floor and upper floor there are some exclusively horizontal cracks in the rough plaster (mostly < 1 mm), partly 2 - 3 m long. These are mainly visible on the concrete partition wall to the other semi-detached house, but also on other interior and exterior walls. According to the owner, the cracks are not new and no longer changing. Some of the cracks have been covered with acrylic paint. I have attached four pictures.

Has anyone experienced similar cracking and can help to assess them.

Thank you very much! Fabian

According to the owner, the cracks are not new and are no longer changing.

I find both statements credible, and none of the shown hairline cracks dramatic. Semi-detached house means there is a second half. If this is built technically identically (mixed semi-detached houses were not common back then), I would also interview the neighbor.

Interview neighbors.

Thank you! Today we visited the neighbors in the semi-detached house. The house is identical and he had the same issue, a long time ago. However, he eventually removed the plaster and protected the new plaster against cracking with fiberglass mats.