CDM/General/TBT-CDM-013

F10 Notification Requirements

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F10 Notification Requirements

Toolbox Talk Record

Ref: TBT-CDM-013  |  Issue: 1  |  Date: March 2026
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What?

  • An F10 notification informs the HSE that a construction project is about to start.
  • CDM 2015 Regulation 6 requires notification for projects lasting longer than 30 working days with more than 20 workers.
  • Notification is also required if the project exceeds 500 person-days of construction work.
  • The client is responsible for ensuring the F10 is submitted to HSE before the construction phase begins.
  • The F10 must include project details, client information, and appointments of principal designer and contractor.
  • A copy of the F10 must be displayed in the site office where it can be read by all workers.
  • The notification must be updated if key details change during the project such as PC or PD appointment.
  • Failure to notify is a criminal offence under CDM 2015, enforceable by the HSE.
  • The F10 can be submitted electronically through the HSE website at no charge.
  • Notification helps HSE target inspection resources at higher-risk construction projects.

Why?

Legal requirementCDM 2015 makes F10 notification mandatory for qualifying projects — failure to notify is a criminal offence.
HSE oversightNotification allows the HSE to plan inspections and target resources at projects with higher risk profiles.
Project accountabilityThe F10 establishes a formal record of duty holder appointments and project details from the outset.
Do Don't
  • Check whether your project meets the F10 notification thresholds under CDM 2015
  • Submit the F10 to HSE before the construction phase begins on site
  • Include the names of the client, principal designer, and principal contractor
  • Display a copy of the F10 notification in the site office for all to see
  • Update the F10 if key appointments or project details change during works
  • Record the date of submission and retain confirmation from HSE
  • Ensure the client understands their duty to arrange notification
  • Include the estimated project duration and peak number of workers
  • Use the HSE electronic notification system for straightforward submission
  • Brief the site team that the F10 has been submitted and is displayed on site
  • DON'T start the construction phase without submitting the F10 where required
  • DON'T assume notification is the principal contractor's responsibility — it is the client's
  • DON'T leave the F10 unfiled — it must be visibly displayed in the site office
  • DON'T ignore changes to key appointments — update the F10 with HSE promptly
  • DON'T calculate thresholds incorrectly — include all workers across all trades
  • DON'T forget that 500 person-days triggers notification regardless of project duration
  • DON'T treat F10 notification as optional — it is a legal requirement under CDM 2015
  • DON'T submit incomplete information — HSE requires accurate project details
  • DON'T discard confirmation of notification — keep it in the project health and safety file
  • DON'T confuse the F10 with other notifications such as asbestos or demolition notices

See also: CDM 2015 Awareness | Client Duties Under CDM
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