Granny flats have become one of the smartest property investments in Perth. Homeowners are building them for rental income, multigenerational living, or to increase property value. However, one important decision often creates confusion — should you choose a custom granny flat or a standard granny flat? Both options have clear benefits. The right choice depends on your budget, block size, lifestyle needs, and long-term goals. In this guide, we break down the key differences w