| SMITH | — | — | — | Open → |
| SMITH | — | — | — | Open → |
| SMITH | — | — | — | Open → |
| SMITH | — | — | — | Open → |
| So Sound Design | Nr Selby | — | — | Open → |
| Solihull Metropolitan Borough Council | Solihull | buildingcontrol@solihull.gov.uk | 0121 704 6000 | Open → |
| Solve Architecture | Leeds | — | — | Open → |
| SONHANPAL | — | — | — | Open → |
| Sonia King | Leeds | — | — | Open → |
| Sonya Facey | Leeds | — | — | Open → |
| Sophie Booth _Harris | Leeds | — | — | Open → |
| SOPHIE ATKINSON | — | — | — | Open → |
| Sophie Booth Harris | Leeds | — | — | Open → |
| Sophie Parkinson | Beverley | sophie_parkinson@hotmail.co.uk | — | Open → |
| Sophie Spencer | York | — | — | Open → |
| Sophie Twitchen | — | — | — | Open → |
| SOUTH | — | — | — | Open → |
| South Ayrshire Council | Ayr | — | 01292 612000 | Open → |
| South Bedfordshire District Council | Dunstable, Bedfordshire | — | 01582 474075 | Open → |
| South Bucks. District Council | Slough | buildingcontrol@southbucks.gov.uk | 01753 676211 | Open → |
| South Cambridge shire District Council | Cambridge | building.control@scambs.gov.uk | 01223 443203 | Open → |
| South Cave Tractors | Brough | — | — | Open → |
| South Derbyshire District Council | Swadlincote, Derbyshire | — | 01283 228030 | Open → |
| South Gloucestershire Council | Thornbury, Sth. Gloucestershire | — | 01454 863450 | Open → |
| South Gloucestershire Council | Bristol | — | 01454 863534 | Open → |