| Abbreviation | Definition |
|---|---|
| LDG | Lodge |
| LDO | Luxury Decor Option |
| LE | Location Extension |
| LEAD | Living Edge Architects and Designers |
| LEAF | Leading European Architects Forum |
| LEAPS | Leading Edge Architecture for Prototyping Systems |
| LEED | Leadership in Energy and Environment Design |
| LEL | Lower Explosive Limit |
| LF | Load Factor |
| LGA | Lucchesi Galati Architects |
| LHPA | Lee Harris Pomeroy Architects |
| LINA | Learning Interacting and Networking in Architecture |
| LISA | LCA in Sustainable Architecture |
| LISA | Local Integrated Systems Architecture |
| LLA | Laguarda Low Architects |
| LLA | Logical Layered Architecture |
| LLAG | London Landscape Architecture Group |
| LLF | Light Loss Factor |
| LOHA | Lorcan O Herlihy Architects |
| LOHA | Lorcan O'Herlihy Architects |