Greenhills day service (Hemel Hempstead) For adults with a physical disability. Greenhills day service Tenzing Road Adeyfield Hemel Hempstead Hertfordshire HP2 4HS Map and directions We're open Monday to Friday, 9am to 5pm. Facilities Wheelchair access. Parking outside. Hearing loop. View the AccessAble access guide for this venue. Want to come to Greenhills day service? You'll need an assessment before you can start going to Greenhills day service. This is just where someone will talk to you about your needs. We'll see if a day service is the right thing for you. Get an assessment to join Greenhills day service Could you volunteer at a day service?