This document provides an overview of the key changes to the Construction Design and Management (CDM) regulations that will take effect in April 2015 in the UK. Some of the main changes include: 1) Projects will only need to be notified to the HSE if they last over 30 days with over 20 people on site, rather than 30 days or 500 person days; 2) Domestic projects involving two or more contractors will now be included; 3) The role of the CDM Coordinator will be replaced by the Principal Designer who will have design phase responsibilities. The client will have new duties including appointing the Principal Designer and Contractor and ensuring they fulfill their roles.