Cost of accessory dwelling unit — Boca Raton, FL
Last updated: September 24, 2026
What affects the price
Building an ADU involves several moving parts that shape your total investment. The final figure depends heavily on whether you choose a prefab unit or a custom build from the ground up. Site conditions are another major factor; if your property requires extensive grading, utility trenching, or foundation work, costs will climb. You also have to consider your choice of finishes, like high-end appliances or custom cabinetry. Navigating local permit fees and impact assessments also adds to the total.
About this service
Building an ADU involves several variables that shift the total investment. Your site conditions, the type of foundation, and the quality of finishes you choose will dictate whether you land on the lower or higher end of the spectrum. Because every lot is unique, we provide a breakdown of your specific project requirements to ensure full transparency. Exact pricing confirmed free on the call.
Frequently asked in Boca Raton
Are accessory dwelling unit homes a good investment in Boca Raton?
Where can I find an accessory dwelling unit for rent in Boca Raton?
What is the process for an ADU permit in Boca Raton?
What are the options for a detached accessory dwelling unit in Boca Raton?
How do I get started with a backyard accessory dwelling unit project in Boca Raton?
What are the benefits of modular accessory dwelling units?
What services are available for accessory dwelling units in Boca Raton?
Also serving nearby: Pompano Beach · Coral Springs · Fort Lauderdale · Sunrise · Davie
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Boca Raton — population 99,974; about 3,426 residents per square mile across 29.2 sq mi. ZIP codes covered include 33427, 33428, 33429, 33431, 33432, 33433, 33434, 33464.
Neighborhoods served in Boca Raton: East Boca Raton, West Boca Raton, Downtown Boca Raton, University Park, Harbour Isles — and every surrounding area.
Areas we serve
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