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When Is a Project Notifiable Under CDM 2015?
A construction project must be notified to HSE on form F10 when the work is expected to last longer than 30 working days and have more than 20 workers working at the same time at any point, or to exceed 500 person-days. Either test on its own is enough. The client has the duty to notify, as soon as practicable before the construction phase begins, though someone else may submit it on their behalf.
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The two tests
| Test | Notifiable when the work is scheduled to |
|---|---|
| Duration and headcount | last longer than 30 working days and have more than 20 workers working simultaneously at any point |
| Volume of work | exceed 500 person days |
The first test needs both halves. A long job with a small crew never meets it, and nor does a short job with a big one, however many people turn up. That is what the second test is for: a long job with a small crew can still pass 500 person-days. A working day is any day on which construction work takes place (regulation 2).
Worked examples
| Project | Working days | Peak workers | Person-days | Notifiable? |
|---|---|---|---|---|
| Office refit | 25 | 30 | 400 | No: not over 30 days, not over 500 person-days |
| Warehouse extension | 60 | 22 | 900 | Yes: over 30 days and over 20 at once; also over 500 person-days |
| Long job, small crew | 120 | 5 | 600 | Yes: over 500 person-days |
After the answer
If the project is notifiable, the client (or someone acting for them) submits form F10 online through HSE. The notice must be displayed in the site office where workers can read it, and updated if the particulars change. Notification does not decide whether you need a construction phase plan: every project needs one. The construction phase plan builder will draft it. For the traps in the word "simultaneously" and what happens when the programme grows, read our CDM 2015 notifiability guide.
Frequently asked questions
When is a construction project notifiable under CDM 2015?
When the construction work is scheduled to last longer than 30 working days and have more than 20 workers working simultaneously at any point in the project, or to exceed 500 person days (regulation 6).
Who has to notify HSE?
The client, in writing, as soon as is practicable before the construction phase begins. The client may ask someone else to submit it on their behalf. For a domestic client, the contractor (or principal contractor) normally takes on the client's duties, including notification.
How is a project notified?
Using HSE's online form F10. HSE no longer accepts paper, email or posted notifications. The notice must also be displayed in the construction site office where workers can read it.
What is a working day under CDM 2015?
Regulation 2 defines a working day as any day on which construction work takes place, so weekend working counts and days with no work on site do not.