This study characterizes a biodegradable composite made from rice husk ash, coconut husk fiber, recycled glass, and epoxy resin, targeting to the development of sustainable materials. Two composite material formulations were used and based on tensile and flexural testing, the optimal composition, 55% epoxy resin, 20% recycled glass, 15% coconut husk fiber, and 10% rice husk, was chosen for further analysis. From experimental results, the mechanical properties were used as input for finite element analysis for real-world performance. The model represents a console table of 20 mm thick, fabricated from the composite material; it should include all the dimensions and properties of the material of the structure for its correct analysis. The synthesis consists of a combination of components where epoxy is the binding matrix, which adds to the mechanical strength by adding recycled glass to it; coconut husk fiber improves the tensile properties, and rice husk ash is added to provide rigidity and environmental resistance. The deformation, stress–strain characteristics, and vibrational properties of the proposed composite material were analyzed for making structural applications. The results of flexible testing show that the maximum deformation over the load area was 0.11572 mm. The maximum equivalent (von Mises) stress and strain were obtained as 11.81 MPa and 0.42254 mJ. Moreover, the modal analysis acquired ranged from 15.08 Hz to 430.21 Hz.