The increase in the awareness of healthcare design quality has reached a significant level in almost all parts of the world. For that reason, recent studies have gained great importance in healing environment design in order to increase healthcare quality for patients. The relationships between evidence-based design (EBD) and patient-centred care design (PCCD) and their direct effects on patient health and well-being outcomes have been playing an increasingly important role in healthcare design. This paper aims to explore new trends and paradigms in designing healthcare building facilities as well as measuring and integrating the qualities of the buildings, in light of existing evaluation methods for healthcare facilities. This study also focuses on improving healthcare design quality through international accreditation and certification, based on patient-centred care design and evidence-based design values, with the intention of creating a new ‘hospital design guideline for architects’ to be able to improve health outcomes for patients. As a result, this research contributes to the creation of a newly adapted survey-based assessment method as a post-occupancy evaluation to improve the healthcare quality of healthcare building facilities, while examining the role of physical surroundings on the health and well-being of patients. This has been achieved through the collection of selected hospital design instruments for healthcare facility design from across the world and the comparison of international accreditation systems, through the identification of general advantages and disadvantages and the lack of certain aspects concerning health outcomes. On the other hand, the same comparison has been made for certification and licensure used globally in order to highlight differences and similarities in the healthcare design sector. The necessary requirements for healthcare facility design have been explored to improve the needs of patients. The concept of healing healthcare design alongside patient-centred care design and evidence-based design aspects are used to create a humane healthcare quality to meet international healthcare design standards. This paper concludes that there is a need for a ‘new adapted guideline’ with a view to designing hospital buildings within the standards required to be able to become internationally accredited and to improve healthcare design quality, patient health and well-being outcomes. There is a need to rethink healthcare building design and evaluation methods of healing environments in order to improve existing standards for international accreditation in relation to patient experience within these hospital buildings. Keywords: healing spaces, patient-centred care design, evidence-based design, healthcare quality, international accreditation, healthcare design standards, assessment methods

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