The FIB shares the classroom areas on the North Campus with the School of Telecommunications Engineering of Barcelona (ETSETB) and the School of Civil Engineering of Barcelona (ETSECCPB). The classrooms where FIB classes are held are in the A4, A5 and A6 classroom areas with the following distribution:
| Classroom | CLASSROOM AREA 4 | CLASSROOM AREA 5 | CLASSROOM AREA 6 |
| capacity
| morning | afternoon | capacity | morning | afternoon | capacity | morning | afternoon |
| 001 | 120 | | | 120 | FIB | | 120 | FIB | FIB |
| 002 | 120 | FIB | | 120 | FIB | FIB | 120 | FIB | FIB |
| E01 | | | | 140 | FIB | FIB | 140 | FIB | FIB |
| E02 | | | | 140 | FIB | FIB | 140 | FIB | FIB |
| 101 | 84 | | | 84 | FIB | | 84 | FIB | FIB |
| 102 | 132 | FIB | | 132 | FIB | FIB | 132 | FIB | FIB |
| 103 | 84 | | | 84 | FIB | FIB | 84 | FIB | FIB |
| 104 | 40 | | | 14T/28 | FIB | FIB | 14T/28 | FIB | FIB |
| 105 | 45 | | | 14T/24 | FIB | FIB | 14T/28 | FIB | FIB |
| 201 | 60 | | | 62 | FIB | FIB | 126 | | |
| 202 | 99 | FIB | | 28T/56 | FIB | FIB | 51 | FIB | |
| 203 | 60 | FIB | | 16T/32 | | | 35 | | |
| 204 | 59 | | | 60 | FIB | FIB | | | |
| 205 | 59 | | | 57 | FIB | FIB | | | |
| 206 | 59 | FIB | FIB | 59 | FIB | FIB | | | |
Classroom equipment:
| Fixed videoprojector | Network connection + fixed videoprojector | Public-address system
| Public-address system + fixed videoprojector | Public-address system + network connection + fixed videoprojector |