Microcement fireplace cost is typically quoted as a total project price rather than a fixed square foot rate due to the highly skilled, artisanal nature of the work. However, to provide an estimate, pricing for a typical fireplace project starts around $25 per square foot. For large-scale projects exceeding 1,000 square feet, the price can be lowered to as low as $20 per square foot. Please note that the final cost depends heavily on the complexity of the surface (corners, edges, mantel details) and the condition of the existing substrate.