The cost of building a custom home in Perth can vary significantly depending on factors such as the size of the home, the quality of materials and finishes, the complexity of the design, and the location. Luxury custom home builders in Perth like Trendsetter Homes typically start from around $1,000,000 for luxurious custom homes. To get an accurate quote for your specific requirements, it is recommended to consult with a reputable custom home builder like Trendsetter Homes.