Minor works Class I, II and III explained (and types A to H)
BD groups minor works into three classes by nature, scale, complexity and risk. A contractor needs both the class and the type of the work on its registration.
| Class I | Class II | Class III | |
|---|---|---|---|
| Complexity and risk | High | Medium | Low |
| Number of items | 58 | 68 | 61 |
| Prepares and signs prescribed plans | Prescribed building professional and prescribed registered contractor | Prescribed registered contractor | Prescribed registered contractor |
| Submit before works start | At least 7 days | At least 7 days | Not required |
| Submit after completion | Within 14 days | Within 14 days | Within 14 days |
| Contractors who may do it | RGBC, or RMWC (company) registered for Class I | RGBC, or RMWC (company) registered for Class II | RGBC, RMWC (company) registered for Class III, or RMWC (individual) |
What does “I,II,III / A,B” on the register mean?
Classes before the slash, types after it. “I,II,III / A,G” means Types A and G at Classes I to III; “II,III / D” means Type D at Classes II and III only. Each company page here turns these into an A-to-H table.
The eight types
A alteration and addition, B repair, C signboards, D drainage, E structures for amenities, F finishes, G demolition, H ventilation systems inside buildings. Find contractors by type: minor works contractors by type
Sources (government pages)
- BD: Introduction to the Minor Works Control System
- BD: Who can carry out minor works
- BD: Types of minor works
Written by us and checked against the pages above in October 2026; where they differ, the government pages prevail.