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Granny Flat Costs: $120K to $320K in 2026
In 2026, constructing a granny flat ranges from $120,000 to $320,000, influenced by unit type, square footage, site challenges, and material selections. Options from garage conversions to standalone builds provide varied paths to added space or income. Delve into cost breakdowns, construction timelines, investment returns, and essential planning steps for your accessory dwelling unit.
By Susan Weiland
5 min read