The company C. MARAVEAS & Associates Co is registered at the list of the Consulting Firms of the Greek Ministry of Public Works with number 98 and at the undermentioned categories and levels (E level is the highest available):
| CATEGORY | LEVEL |
| 06 Architectural Design | Ε |
| 07 Advanced Architectural Projects | D |
| 08 Structural Engineering | Ε |
| 10 Transportation Projects | D |
| 13 Hydraulics Projects | C |
| 16 Survey Projects | Ε |
| 21 Geotechnics | D |
| 27 Environmental Projects | Α |