| Lichfield District Council | Lichfield | enquiries@southernstaffs-buildingcontrol.co.uk | 01543 414000 | Open → |
| Lichfield Fire & Rescue Service | Staffordshire | — | 01543 263229 | Open → |
| Liftspot Ltd | Leeds | — | — | Open → |
| Lilly Marchesi | Leeds | lillymarchesi@gmail.com | — | Open → |
| LINA CHINA | — | — | — | Open → |
| Lincolnshire Fire & Rescue | Lincoln | fire.safety@lincoln.fire-uk.org | 01522 582258 | Open → |
| Lincs Building Consultancy | Louth | lbc@lincsbc.gov.uk | 08707551696 | Open → |
| Linda Barnes | Selby | — | — | Open → |
| LINDA BROWN | — | — | — | Open → |
| Linda Dray | Leeds | — | — | Open → |
| Linda Etherington | Leeds | — | — | Open → |
| LINDA HARDWICK | — | — | — | Open → |
| Linda Milton | Leeds | — | — | Open → |
| Linda Murray | Huddersfield | lindamurray19517@gmail.com | 07989038325 | Open → |
| LINDA PENNINGTON | — | — | — | Open → |
| LINDA SADDLER | — | — | — | Open → |
| LINDA WILKINSON | — | — | — | Open → |
| LINDLEY BUILDERS (LEEDS LTD ) | — | — | — | Open → |
| Lindsay Burr | Stamford Bridge | — | — | Open → |
| Lindsay Dawes | Retford | westlandsfmshop@btconnect.com | 07443564314 | Open → |
| Lindsay Martin | Leeds | — | — | Open → |
| Lindsey Burr | Malton | — | Lindsay Burr Sutton Grange Developments Sutton Grange Norton Malton YO17 9PU | Open → |
| Linked Design Studio | Ellerton | — | — | Open → |
| Linley & Simpson | Keighley | — | — | Open → |
| Linleys Builders | Leeds | — | — | Open → |