Cost, Time and Fragmentation: What Holds Back Circular Construction Across the UAE

Researchers examined how obstacles connect across the UAE construction industry, using professional survey responses and a probability-based model. The findings identify transition complexity, fragmented responsibilities, and pressure to prioritise cost and time as the most influential barriers.

A building's useful materials do not have to become waste when renovation or demolition begins. Circular construction keeps materials in use through better design, repair, reuse, and recycling, reducing the need to extract new resources. Turning that idea into everyday practice depends on decisions made across a building's life, from purchasing materials to planning their recovery.

The study, "Systemic barriers to circular economy adoption in UAE construction: Bayesian network evidence and a transition framework," published in Frontiers in Built Environment, explores what makes this change difficult. Sabreen Dar Amer and colleagues examined how obstacles connect across the UAE construction industry, using professional survey responses and a probability-based model. The findings identify transition complexity, fragmented responsibilities, and pressure to prioritise cost and time as the most influential barriers.

For readers wondering why construction waste remains difficult to tackle, the research offers an explanation grounded in how projects operate. A contractor's ability to reuse materials depends on reliable information, suitable standards, recovery facilities, willing buyers, and decisions made by other organisations. Progress requires these parts of the industry to work together, with responsibilities and incentives that support material recovery throughout a project.

How the Researchers Mapped Circular Construction Barriers

The researchers identified 25 barriers from existing literature, covering technology, economics, regulation, organisational practices, infrastructure, and behaviour. Eight experts reviewed the list for clarity and relevance to the UAE, confirming the barriers without proposing additions. An emailed survey collected 60 complete, eligible responses from approximately 100 invited professionals over four weeks, including contractors, consultants, developers, suppliers, and government-related participants.

Participants rated each barrier on a five-point scale, which the researchers grouped into low, medium, and high impact levels. A Bayesian Belief Network mapped relationships between the barriers, allowing the team to explore how information about one obstacle changed the estimated probabilities of others. The researchers compared conventional individual rankings with Network Propagation Impact, or NPI, a measure of how strongly each barrier was associated with changes across the model.

Three Barriers That Changed the Priority List

The complexity of switching to circular construction ranked first under both approaches, receiving an NPI score of 0.1245. Industry fragmentation ranked second at 0.1212, followed by prioritising cost and time at 0.1071. Financial risks and inadequate circular economy infrastructure occupied fourth and fifth place, showing the importance of investment conditions and practical recovery capacity.

Fragmentation rose from eleventh place in the individual ranking to second in the network ranking, exposing the importance of disconnected responsibilities. Cost-and-time priorities moved from twelfth to third, reflecting the wider influence of project decisions that favour low initial spending and fast delivery. Missing government incentives fell from third to joint twenty-fourth, a result that describes their influence within this model without making incentives unimportant.

Transition complexity involves changes to design, purchasing, documentation, sorting, certification, and recovery, creating demands that individual project teams can struggle to manage. Separate organisations often control different stages of a building's life, leaving material reuse dependent on information and commitments that do not travel smoothly between them. Procurement focused on immediate costs and deadlines can leave little room for the early planning, material checks, and coordination that circular construction requires.

Practical Changes That Could Make Material Reuse Easier

The model connected limited awareness with reluctance to invest, and connected transition complexity with investment reluctance and missing practical tools. Immature technologies and weak demand for recovered materials were linked to tool availability, suggesting that technical development needs a functioning market around it. Financial planning was connected to information gaps and capital requirements, identifying a need for clearer knowledge about implementation costs, recovery options, and potential value.

A further modelled pathway connected data availability, standards for recovered materials, and regulatory development, supporting the authors' call for coordinated action across these areas. Their proposed framework links six broad barrier categories to the three leading obstacles, then connects intervention priorities with expected improvements in readiness, reuse, waste reduction, and resource efficiency. Those priorities cover coordinated governance, procurement reform, practical tools, market infrastructure, awareness, and investment.

For policymakers, the proposed approach brings material standards, waste reporting, enforcement, and reuse incentives into a coordinated programme that builds on existing UAE initiatives. Clients and developers can include circular requirements in tender assessments, design briefs, contracts, and supplier expectations, giving greater weight to value across a building's life. Contractors and consultants need usable sorting procedures, reuse assessments, shared digital inventories, and material passports that record information needed for future recovery.

Building Information Modelling can help teams organise material information and plan recovery when it is integrated into ordinary project work. Recovered-material markets need testing, certification, transport capacity, accessible sales channels, and dependable demand to make reuse practical and credible. Training and clear responsibilities across designers, builders, demolition teams, and recyclers would support these measures, giving people the knowledge and accountability needed to use them.

What the Findings Can Tell the Construction Industry

The research offers exploratory evidence from 60 deliberately selected professionals, rather than a representative picture of the entire UAE construction workforce. Responses captured perceptions at one point in time, so the network describes probability-based relationships without proving that one barrier causes another. Grouping five-point ratings into three categories removed some detail, and possible overlap between related barriers needs further testing.

The researchers tested network stability through 300 resampled datasets, finding that only one of the 23 connections appeared in more than 70% of those tests. Average connection stability was 35.3%, which means many individual pathways should be treated as tentative, and the NPI scores should remain specific to this dataset. Larger studies across emirates, project types, and professional groups could test the findings using measured waste volumes, recovery rates, costs, and material records.

The proposed framework describes expected benefits that still need to be tested through projects and research tracking change over time. Its central lesson is that the obstacles people rate most severely can differ from those most closely connected to difficulties elsewhere in the system. A workable circular construction strategy brings purchasing decisions, shared responsibilities, reliable material information, and recovery markets into the same conversation.