Universal Design (UD) is increasingly recognized as an essential framework for promoting accessibility and

inclusivity within the built environment; however, its integration into construction practice remains inconsistent,

particularly in developing countries. This study examines the level of awareness of Universal Design among

construction professionals and identifies key barriers affecting its adoption within construction projects in

Nigeria. A quantitative cross-sectional survey design was employed using a structured questionnaire

administered to construction professionals, including architects, engineers, quantity surveyors, contractors,

project managers, builders, and procurement officers. A total of 102 valid responses were analyzed using

descriptive statistical techniques, including frequencies, percentages, mean scores, and ranking analysis.

market driven factors than by lack of professional knowledge.

In order to facilitate the broader incorporation of Universal Design principles in construction practice, especiall

y in developing nation contexts, the study provides empirical evidence emphasizing the necessity of addressing

structural hurdles within project delivery environments.

Keywords: Universal Design, accessibility, construction professionals, inclusive design, implementation

barriers, Nigeria

Designing the built environment for a diverse population requires accommodating a wide range of physical,

sensory, and cognitive abilities. Universal Design (UD) has emerged as a critical framework for promoting

inclusivity, accessibility, and usability in architectural and construction projects (1). UD emphasizes creating

application gap include insufficient professional education, limited continuous professional development

opportunities, weak enforcement of regulations, and inadequate access to digital design tools (6,7).

The principles of UD, which include equitable use, flexibility in use, simple and intuitive use, perceptible

information, tolerance for error, low physical effort, and size and space for approach and use, are fundamental

to creating an inclusive learning environment (8,9)

Additionally, systemic barriers such as perceived cost burdens, client preferences, and socio-cultural perceptions

further restrict UD adoption (10,8). For example, accessible features may be deferred or removed during

construction due to budget prioritization or the belief that UD is only relevant for persons with disabilities. This

gap between awareness and practice underscores the need to investigate both the knowledge and perception of

construction professionals regarding UD, as well as the structural constraints influencing adoption. In Nigeria,

Concept of Universal Design in the Built Environment

Universal Design (UD) refers to the design of products, environments, and services that can be used by all people

to the greatest extent possible without the need for adaptation or specialized design. The concept promotes

inclusivity by ensuring that buildings and infrastructure accommodate individuals regardless of age, physical

ability, or social background (2,1).

Unlike traditional accessibility approaches that emphasize disability-specific modifications, Universal Design

adopts a proactive strategy that integrates accessibility into the early stages of project planning and development.

This approach benefits not only persons with disabilities but also older adults, children, pregnant women, and

individuals with temporary injuries (3). Consequently, UD has become an essential component of sustainable

Despite these benefits, the implementation of Universal Design within construction practice remains

inconsistent, particularly in developing countries where regulatory enforcement mechanisms and professional

training structures are still evolving (4).

When it comes to incorporating Universal Design concepts into the built environment, construction professionals

are essential. From conceptual planning to project execution, design decisions are influenced by contractors,

engineers, architects, and project managers. Therefore, their knowledge and comprehension of Universal Design

have a direct impact on how much inclusive features are included in building projects. (7).

Studies indicate that while many professionals are familiar with the concept of accessibility, their knowledge of

Universal Design principles is often limited to basic compliance requirements rather than comprehensive

Professional education also plays an important role in shaping awareness levels. Research suggests that

architecture and engineering curricula in many developing countries provide limited training on inclusive design

principles, resulting in insufficient preparation of professionals to implement Universal Design effectively in

Digital tools such as Building Information Modeling (BIM) and simulation technologies have been identified as

Economic considerations represent one of the most frequently reported barriers to Universal Design

implementation. Many construction professionals perceive accessibility features as additional project costs rather

than long-term investments that enhance building usability and value (16). Client preferences often reinforce

these perceptions. In situations where project budgets are constrained, accessibility provisions are sometimes

treated as optional components rather than essential design requirements. As a result, Universal Design features

may be reduced or eliminated during project execution stages. However, research suggests that early integration

of Universal Design principles during project planning significantly reduces long-term modification costs and

improves building lifecycle performance. Despite this evidence, misconceptions regarding affordability continue

to influence decision-making within construction practice (10).

further complicates enforcement processes. Responsibilities for accessibility compliance are often distributed

across multiple agencies, resulting in unclear accountability structures. This reduces the effectiveness of

regulatory frameworks intended to support Universal Design adoption (10).

Limited technical knowledge represents another important constraint affecting Universal Design

implementation. Although construction professionals may understand the importance of inclusive environments,

they often lack the technical guidance required to integrate accessibility features effectively into project designs

(4).

The absence of standardized implementation frameworks and technical reference materials contributes to

uncertainty during project development stages. As a result, professionals may rely on conventional design

as a universal requirement for inclusive environments (8). These perceptions affect both client priorities and

professional decision-making processes. As a result, Universal Design features may not receive adequate

consideration during project planning stages. Public awareness campaigns and professional education initiatives

have been identified as important mechanisms for addressing these misconceptions and promoting broader

This study adopted a quantitative cross-sectional survey design to examine construction professionals’ awareness

of Universal Design (UD) and identify perceived barriers affecting its adoption within the Nigerian construction

industry. A structured questionnaire was used to collect standardized responses from professionals involved in

the planning, design, supervision, and execution of construction projects. The quantitative approach was

considered appropriate because the study sought to measure perceptions systematically and rank barriers

influencing UD adoption using statistical indicators. In addition, the design enabled objective comparison across

professional groups and supported the use of descriptive statistical tools for identifying dominant patterns

Universal Design principles in construction projects. A non-probability purposive sampling technique was

adopted to ensure that respondents possessed relevant professional experience in construction practice and

familiarity with project delivery processes. In addition, convenience sampling was applied due to accessibility

constraints and reliance on voluntary participation through professional networks and online communication

platforms such as email and professional WhatsApp groups. Although the survey targeted construction

professionals across Nigeria, the majority of responses were obtained from professionals practicing within Borno

State, with limited participation from other regions. Therefore, while the sampling approach ensured informed

professional perspectives on Universal Design adoption within the Nigerian construction industry, the findings

should be interpreted as indicative of trends within the sampled professional context and may not fully represent

conditions across all geopolitical zones of Nigeria.

Similarly, awareness levels were high across the sample, with 56.9% of respondents indicating that they were

Despite this high level of familiarity, responses relating to the frequency of applying Universal Design principles

revealed some variation. While 38.2% reported always applying Universal Design principles and 40.2%

indicated frequent application, 17.6% reported occasional use and 3.9% indicated rare or no application. This

suggests that although awareness levels are high, consistent implementation remains uneven across construction

The second objective of the study examined perceived barriers affecting the adoption of Universal Design in

construction projects. Responses were measured using a five-point Likert scale, where higher mean values

indicate stronger agreement with each barrier statement.

The results indicate that client priorities related to cost and aesthetics ranked as the most significant barrier (Mean

= 4.33), followed closely by the perception that Universal Design features increase project costs (Mean = 4.27).

The absence of explicit client demand for Universal Design features also emerged as a major constraint (Mean

= 4.19), highlighting the influence of client expectations on accessibility-related decisions during project

delivery.