| BARNARD | — | — | — | Open → |
| Barnsley Building Services | Barnsley | — | — | Open → |
| Barnsley Metropolitan Borough Council | Barnsley | buildingcontrol@barnsley.gov.uk | x | Open → |
| BARRASS | — | — | — | Open → |
| BARRITT | — | — | — | Open → |
| Barrow In Furness Borough Council | Barrow In Furness, Cumbria | — | 01229 842241 | Open → |
| BARRY NICHOLS | — | — | — | Open → |
| BARTON | — | — | — | Open → |
| BARWICK DEVELOPMENTS LTD | — | — | — | Open → |
| Basildon Borough Council | Essex | buildingcontrol@basildon.gov.uk | 01268 294182 | Open → |
| Basingstoke & Deane Borough Council | Basingstoke | building.control@basingstoke.gov.uk | x | Open → |
| Bassetlaw District Council | Worksop, Nottingham | building.control@bassetlaw.gov.uk | x. Office number is 01909 533184 | Open → |
| BATA LTD ( BEVERLEY) | — | — | — | Open → |
| BATEY | — | — | — | Open → |
| Bath & North East Somerset Council | Bath | — | 01225 477501 | Open → |
| BAXTER | — | — | — | Open → |
| BAYSTON | — | — | — | Open → |
| BDA Architects | — | — | — | Open → |
| BDS BUILDING | — | — | — | Open → |
| BDS BUILDING LTD | — | — | — | Open → |
| BDS BUILDING LTD | — | — | — | Open → |
| BDS Building Ltd | York | — | — | Open → |
| BDS BUILDING LTD | — | — | — | Open → |
| BDS building LTD | — | — | — | Open → |
| BDS BUILDING SERVICES | — | — | — | Open → |