Building services acoustics manages both internal and external sound environments within buildings, ensuring comfort and compliance with regulations. External noise & planning considerations are critical for minimising the impact of plant noise on surrounding receptors, especially in urban areas. At the same time, projects often aim for BREEAM, WELL, LEED, and SKA certifications to meet sustainability and well-being goals. Vibration isolation is essential for preventing the transmission of vibrations from sources like lifts and mechanical systems, ensuring a quieter and more stable environment. Internal noise is also a key focus, addressing sound insulation from  common areas and between individual units to support productivity, comfort, and privacy. Other matters which require detailed design assessment is heating and cooling ventilation ducting which can lead to problems such as crosstalk from one office to another and mechanical noise which can be disturbing within office environments.