Keeping up with new engineering trends, the Electrical and Mechanical Services Trading Fund applied MultiTrade Integrated Mechanical, Electrical and Plumbing (MiMEP), Building Information Modelling (BIM) technology and digital technologies such as Government Wide IoT Network, sematic AI etc. for the first time to replace four chillers which had been in service for more than 20 years in Tai Lung Veterinary Laboratory (TLVL) under the Agriculture, Fisheries and Conservation Department. The pilot project essentially leverages the benefits brought by BIM in wider aspects such as 3D laser scanning, Augmented Reality, MiMEP, asset management and project management with the adoption of various digitalization features. Incorporating the advanced technologies not only provides clients with more efficient services, a shorter construction period, better quality control, enhanced work safety and site management, and minimise the impact of the project on clients’ daily operation, but also reduces materials consumption and boosts productivity. The success of the MiMEP pilot project at TLVL demonstrates that technological applications such as MiMEP are not limited to new projects but can also benefit Repair, Maintenance, Alteration and Addition projects. This gives us solid confidence and lays a concrete foundation for future attempts to adopt MiMEP/BIM in similar retrofitting projects by industry.