Where an employee works only one day a week from home must the employer carry out a risk assessment?

Yes. The employer is responsible for the health and safety of employees, including when they are working from home. Employers are required to carry out a sufficient risk assessment of all the work activities carried out by their workers under the Management of Health and Safety at Work Regulations 1999 (SI 1999/3242). With regard to homeworkers the employer must identify the hazards that are present in the home, assess the extent of the risks and make decisions on how to manage the risks, so far as is reasonably practicable. This duty applies even where a hybrid worker works only one day a week from home.

Depending on the nature of the work and the premises, it is likely to be sufficient for the employee to carry out the risk assessment, under the direction of the employer.