| Building | Room | Area | Caucus | Number of caucuses held | Comments |
|---|---|---|---|---|---|
| Centre Block | 112-N | 100m2 (1,100 sq.ft.) | Liberal Rural | 25 | Room shut down for 2 years during the construction of CBUS, explaining low occupancy. Prime location and good size are key advantages of room. |
| 237-C | 250m2 (2,700 sq.ft) | National Liberal | 19 | One of the largest rooms with best location. Considered to be prime caucus space. | |
| 238-S | 100m2 (1,100 sq.ft.) | National Liberal | * | Opens up into 237-C and acts as antechamber to the caucus meeting. A number of telephones are installed in that room for MPs to use during National Caucus meetings (requirement particular to this caucus). | |
| Liberal Manitoba | 15 | ||||
| Liberal National Capital Region | 15 | ||||
| Liberal National Children | 15 | ||||
| 253-D | 250m2 (2,700 sq.ft) | Liberal Ontario | 19 | One of the largest rooms, not used by a national caucus as adjacent room (256-S) does not belong to the HoC. | |
| 340-S | 100m2 (1,100 sq.ft.) | Bloc Québécois Planning | 47 | Under jurisdiction of the Privy Council. | |
| Liberal South Western | 15 | ||||
| 160-S | N/A | Liberal Quebec | 14 | Belongs to the Senate, used by a regional caucus. | |
| 172-E | N/A | Liberal Hamilton Niagara | 14 | Belongs to the Senate, used by a regional caucus. | |
| 356-S | N/A | Liberal North Western | 14 | Belongs to the Senate, used by a regional caucus. | |
| 263-S | N/A | Liberal Atlantic | 13 | Belongs to the Senate, used by a regional caucus. | |
| 256-S | N/A | National Progressive Conservative | 15 | Belongs to the Senate, used by a regional caucus. | |
| West Block | 208, 209, 269 | National Bloc Québécois | 17 | The rooms 208, 209, and 269 are used together to create a space large enough to hold all members because a single large room is not available. | |
| 208 | 70 m2 (775 sq.ft.) | Liberal Greater Toronto | 19 | ||
| 209 | 175m2 (1,900 sq.ft.) | ||||
| 269 | 150m2 (1,600 sq.ft.) | Liberal Economic Development | 16 | ||
| 306, 307, 308 | National Reform | 23 | The rooms 306, 307, and 308 are used together to create a space large enough to hold all members because a single large room is not available. | ||
| 306 | 60m2 (650 sq.ft) | Liberal Northern Ontario | 19 | ||
| 307 | 70m2 (785 sq.ft) | Liberal Ontario Executive | 19 | ||
| 308 | 175m2 (1,900 sq.ft) | ||||
| 371 | 150m2 (1,600 sq.ft) | National NDP | 21 | ||
| NDP Nova Scotia | 20 | ||||
| East Block | 362 | 150m2 (1,600 sq.ft) | Progressive Conservative Staff | 19 | |
| Confederation Building | 300 | 40m2 (460 sq.ft.) | Liberal Atlantic | 5 | This room has recently been allocated to for use by the HoC and is considered to be a small meeting room. |
| Total | 19 Rooms | 418 | 19 rooms are used for caucuses — only 12 are under jurisdiction of the House of Commons. |
Note: N/A = data not available.
* Used as antechamber