The waste produced by thermal power plants, commonly known as fly ash, shares a chemical composition similar to that of traditional raw materials used in brick manufacturing. Recognizing this similarity, the primary objective of this project is to replace conventional brick constituents with fly ash waste, while ensuring the retention of brick properties and environmental safety. By utilizing fly ash in brick production, this initiative aims to mitigate the environmental impact associated with waste disposal from thermal power plants while simultaneously addressing the raw material scarcity in traditional brick manufacturing. To achieve this objective, brick specimens incorporating varying proportions of fly ash (ranging from 0 to 30% by mass) are manufactured and subjected to rigorous testing by Bureau of Indian Standard (BIS) specifications. These tests encompass a comprehensive assessment of key properties including compressive strength, water absorption, efflorescence, bulk density, porosity and initial rate of absorption. Following the manufacturing process, which includes firing the brick specimens at 1000 °C for 24 h to ensure proper consolidation, the specimens undergo a thorough evaluation to determine their performance characteristics. The results obtained from the testing reveal notable trends, particularly about the influence of fly ash content on certain properties. It is observed that as the proportion of fly ash increases, both compressive strength and water absorption tend to increase. This indicates the potential of fly ash to enhance certain properties of the bricks, thereby offering insights into optimizing the composition for improved performance and sustainability in brick manufacturing.