F10 notification: check if you need one, and prepare it
Pro and above
Open your project's F10 Notification page. First it answers the question that matters: does this job need notifying at all?
If your project is notifiable
Review the Pre-filled F10 Data panel.
Start date, duration, principal contractor and designer, worker and contractor counts — pulled from your project so you're not re-deriving them on the HSE form. Gaps show as "Not set": fill them on the Details tab first.
Check the Works supervisor line names the right person.
It comes from the works supervisor in your project's People section — set it in Edit project → People. If you haven't named one, it falls back to a worker with the Site Manager role, and shows "Not assigned" when there is neither.
Click Open HSE F10 Portal and copy each field into the HSE's online form.
Back here, click Mark F10 as Submitted.
The submission date is recorded against the project — your evidence that notification happened before work began.
Submit before work starts
The F10 must be in before the construction phase begins — it's the first thing an inspector checks on a notifiable job. Generate your Construction Phase Plan alongside it; the pre-filled data confirms a CPP is in place.
Frequently asked questions
When does a project need an F10?
Under CDM 2015: construction work lasting more than 30 working days with more than 20 workers on site at once, or exceeding 500 person-days. The page checks your project's duration and workforce automatically and tells you either way.
Who is responsible for notifying the HSE?
For a commercial project, the client is responsible for notification. For domestic projects, client duties normally pass to the contractor on a single-contractor job or the principal contractor when more than one contractor is involved. A principal designer can take on those domestic-client duties by written agreement. Check who holds the duty for your project; see the HSE guidance for commercial clients and domestic clients.
Does The Site Book submit the F10 to the HSE for me?
No — the HSE only accepts F10s through its own online form. We pre-fill the data for you to copy across, link you to the HSE portal, and record the date once you mark it submitted.
Can I record the F10 from the mobile app?
Yes. In the Site Book app, open the project and tap F10 Notification under Compliance. Open HSE F10 portal takes you to the HSE form in your browser; back in the app, tap Mark F10 as notified and confirm with Mark notified to record today's date (Update notification date re-stamps it; Clear notification removes it). The app doesn't run the notifiability check — do that on the web page. Recording the F10 needs Pro (£39/mo) or above. The app checks your access for the project when it opens the screen: if F10 isn't included it shows an upgrade prompt instead of the Mark F10 as notified button, and if it is — including a project with the setup service purchased, or an account with legacy F10 access — the button is there with no prompt. If access cannot be checked, reload the screen and try again. An open confirmation is cancelled when your account, role or project access changes; open a new confirmation once access is available.
The check says my project isn't notifiable — is that recorded?
Yes, the page states the project doesn't exceed the thresholds, based on the details you've entered. If the job grows (longer duration, more workers), update the project details and check again — notifiability can change.
Related guides
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