Association of Quantity Surveyors (AQST), Thailand is a professional Quantity Surveying organization registered in Thailand that promotes the Quantity Surveying profession in Thailand.

The objectives of AQST in its constitution include the advancement and unity of quantity surveyors by education and research, continuing professional development and to secure uniformity in education standards and methodology by quantity surveyors in Thailand.

Members include persons who are also members of internationally recognized QS professional bodies such as RICS, AIQS, HKIS, SISV, RISM, etc. based in Thailand. AQST corporate membership is open to corporate members of internationally recognized QS professional bodies and to QS trained engineers/architects/allied professions with at least 5 years of relevant QS services work experience in Thailand and subject to passing an Assessment of Professional Competence (APC) interview and a Code of Conduct paper.

Other grades of membership include Fellows, Affiliates, Graduate and Student membership subject to their specific qualification requirements.