Client Cost Aversion and Professional Risk Perception in Kenya’s Green Building Adoption

Kenyan built environment from a prevalent Supply-Side Deficit Model (focusing on legislation and training) to a Demand-Side Market Failure Model centered on the client-designer financial conflict. Analyzing survey data from a whole population of interior design practitioners in Kenya (N=56) using Mean Ranking (MR) and Principal Component Analysis, the study reinterprets the factors that impede sustainable specification. While the Absence of mandatory legislation (F9) ranked highest (xˉ=4.39), its primary consequence is the enabling of Client unwillingness to utilize green strategies (F12) (xˉ=4.00) and Overall Client Control (F13) (xˉ=3.64).The paper argues that in a voluntary regulatory environment, client cost aversion acts as the proximal cause of marginalization, creating an immense professional risk perception that suppresses the designer's motivation to specify sustainable solutions, even if they possess the technical know-how (F2). This perspective shifts the focus from simply lacking skills or laws to managing the financial and liability risks inherent in proposing optional, high-cost sustainable solutions in a competitive, cost-sensitive market. The study concludes that market dynamics, driven by client resistance, must be countered by financial de-risking mechanisms and performance guarantee schemes rather than solely relying on future mandatory codes.