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Granny Flats Cost $85K to $300K in 2025
In 2025, constructing a granny flat ranges from $85,000 to $300,000, with average professional builds at $160,000. Factors such as size, materials, and location drive these costs, while strategic choices can increase property value by 25 to 35 percent. This guide details breakdowns, packages, and tips to optimize your investment in this versatile backyard addition.
By Daniel Burnett
6 min read