| Abbreviation | Definition |
|---|---|
| OPRA | One Piece Reduced Area |
| OS | Off-Street parking |
| OSB | Occupancy Standards Bureau |
| OSP | Off-Street Parking |
| OSRD | Open Space Residential Design |
| OT | Occupancy Threshold |
| OTB | Option To Buy |
| OTH | On The House |
| OTHS | Others |
| OTM | On The Market |
| OTP | Option To Purchase |
| OVH | One Vision Housing |
| OVN | Oven |
| OWNOCC'D | Owner Occupied |
| OWNOCCUP | OWNer OCCUPied |
| OYO | Own Your Own |
| P | People |
| P | Poor |
| PBV | Project-Based Vouchers |
| PCH | Porch |