The Master of Philosophy (Building) — often listed as MPhil (Architecture, Building and Planning) or MPhil (Built Environment) at Australian universities — is a postgraduate research degree that sits at the intersection of construction technology, sustainable building practice, building science, and design research. Unlike coursework masters degrees, the MPhil is a higher-level research qualification that requires candidates to conduct independent and sustained research into a specific problem, issue, or topic within the building discipline. Working under the guidance of a supervisory panel of academic experts, students produce a substantial written thesis — typically between 40,000 and 60,000 words — that makes an original contribution to knowledge in the field. The degree is normally completed in 1.5 to 2 years full time, or up to 4 years part time, and may in some institutions be undertaken as a written thesis or as a research-by-design thesis, depending on the nature of the research question.

The MPhil (Building) is designed for graduates from architecture, construction management, building technology, engineering, urban planning, or related built environment disciplines who wish to develop deep expertise in a specialised area through rigorous academic inquiry. Research topics can range from sustainable construction materials and passive building performance to building information modelling (BIM), heritage conservation, housing policy, occupant wellbeing, post-occupancy evaluation, smart buildings, and construction project management. The degree is ideal for those seeking an academic or research career, those intending to progress to a Doctor of Philosophy (PhD), and practitioners who wish to bring evidence-based research skills into professional or policy roles.

Graduates of the MPhil (Building) are well regarded by a wide range of employers across Australia, including government planning and infrastructure agencies, construction and development companies, engineering and consulting firms, research institutes, academic institutions, property developers, sustainability consultancies, and peak industry bodies such as the Australian Institute of Architects, the Australian Institute of Building, and the Green Building Council of Australia. The qualification signals a high level of analytical rigour, independent problem-solving, and specialised expertise that is increasingly valued as Australia's construction industry confronts complex challenges around climate adaptation, housing affordability, digital transformation, and urban growth.

To be considered for entry into an MPhil (Building) program at an Australian university, applicants are typically required to hold an undergraduate Honours degree (Australian Qualifications Framework Level 8) at a minimum of Second Class Division A (H2A, 75–79% or Distinction average), or a coursework Masters degree in a relevant discipline that includes a substantial research component. Some institutions also consider a four-year professional honours degree in architecture, construction management, building, urban planning, or a related built environment field. Applicants who have significant and relevant professional experience in the intended area of research may, in some cases, have that experience assessed as equivalent to academic qualifications by the institution's Higher Degree Research Committee. All applicants must demonstrate that their prior qualifications are in an area directly relevant to their intended MPhil research topic.

A key component of all MPhil (Building) applications is the submission of a detailed research proposal, typically two to four pages, outlining the research question, its significance, the proposed methodology, and a preliminary review of relevant literature. Applicants are also expected to identify a potential supervisor whose research interests align with the proposed topic, and in many cases must secure a written commitment of supervision before an offer of admission is made. Shortlisted applicants may be invited to an interview. Most Australian universities require international applicants to demonstrate English language proficiency through IELTS (Academic), typically a minimum overall band score of 6.5 to 7.0 with no individual band below 6.0, or an equivalent score in TOEFL iBT or PTE Academic. Domestic applicants whose schooling was not conducted in English may also be required to provide evidence of English proficiency.

Domestic students who are Australian citizens or permanent residents are generally eligible to have their tuition fees covered under the Australian Government's Research Training Program (RTP), which funds Higher Degree by Research (HDR) places at accredited universities. Competitively awarded research stipend scholarships are also available through the RTP and through individual universities, providing living allowance support for full-time candidates. International students are required to pay tuition fees, though scholarships such as the Australia Awards and university-specific international HDR scholarships may offset costs. Most programs require candidates to attend the university in person for at least the first six months of candidature, as fully online or entirely distance-supervised research is generally not approved.