C5 GmbH represented by the managing directors

Frauke Kaven, Dipl. Ing. Architect and
Anja Rosen, Prof Dr. Ing. Architect

Bült 13
48143 Munster
Telephone: +49 - 251 - 37.977.366

Commercial register

Amtsgericht Münster HRB 20381

VAT identification number according to §27s UStG

DE 353917723

Supervisory authority of C5 GmbH

Chamber of Industry and Commerce North Westphalia,
Public corporation
Sentmaringer Weg 61, 48151 Münster

Professional Liability Insurance

There is professional liability insurance for architects and civil engineers with VHV Allgemeine Versicherung AG, VHV-Platz 1, 30177 Hanover. The insurance protection relates to the services of an appraiser and expert and exists for personal injury, property damage and financial loss.

Design and programming of the website


Content and works on these pages are subject to German copyright law. The duplication, processing, distribution, and any kind of exploitation outside the limits of copyright require the prior written consent of the company. Downloads and copies of this site are only permitted for private, non-commercial use. On the project and services pages, the authors or rights holders of photographs are usually identified by a note next to the respective image. The author or owner of the rights to the images presented by the team is: Daria Yakina.

Limitation of Liability

As the publisher of this site, we are responsible for our own content on these sites in accordance with Section 7, Paragraph 1 of the German Telemedia Act (TMG). According to §§ 8 to 10 TMG, however, we as the publisher are not obliged to monitor transmitted or stored third-party information or to investigate circumstances that indicate illegal activity. Obligations to remove or block the use of information according to general laws remain unaffected. However, liability in this regard is only possible from the point in time at which knowledge of a specific infringement of the law is known. As soon as we become aware of any violations of the law, we will remove this content immediately.


C5 makes it easier to build sustainably. We offer creative consulting for circular and certified construction.

C5 GmbH
Bült 13
48143 Münster
+49 251 37.977.366

© 2022 C5 All rights reserved