Development
1932
Company found by Kastor Sonntag with the focus on structural engineering.
1959
Josef Sonntag leads the enterprise and concentrates more on underground construction,
road construction and civil engineering.
1964
Erection of a branch office in Bingen.
1983
Moves in own establishment in the industrial area Bingen-Kempten on an area of approx.
12,000 m².
1986
First construction site uses electronically controlled pipe jacking.
1988
Move of the headquarter from Gondershausen to the industrial area Dörth. The property
size amounts to approx. 21,000 m². The fastened areas are used as building court,
workshop and store.
1989
Entrance to the “RKS Gravel- and Split-Plant”, Eckelsheim.
1990
Environmental protection price for an environment conscious corporate management.
1991
Foundation of SONNTAG Bau GmbH in Hönow near Berlin.
1996
The managing partners Grad.-Eng., Grad.-Ind.-Eng. Bernd Sonntag and Grad.-Eng. Marion
Sonntag lead the consortium SONNTAG with the partners Grad.-Eng. Josef Sonntag and
Iris Sonntag.
2004
SONNTAG takes over the ferro-concrete and prestressed concrete precast plant Monnerjahn
in Halsenbach.
2007
World premiere in Worms! A 464 m long culvert pipeline is pressed with the new developed
Direct Pipe® method under the Rhine for the first time.